Journal of Power Sources最新文献_第8页

Synergistic integration of ferroelectric BiFeO3 and NiFe LDH for enhanced hydrogen production via biochar-assisted water electrolysis 铁电BiFeO3和NiFe LDH协同集成，通过生物炭辅助水电解增强制氢

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-01-21 DOI: 10.1016/j.jpowsour.2026.239379

Zhi Ying, Ruipeng Lei, Xinyue Chen, Xiaoyuan Zheng, Binlin Dou, Guomin Cui

The development of integrated processes for sustainable hydrogen production coupled with biomass valorization is critical for advancing toward a carbon-neutral economy. Herein, we report a novel heterostructured electrocatalyst constructed by synergistically integrating ferroelectric BiFeO₃ (BFO) with NiFe layered double hydroxide on nickel foam (BFO-NiFe LDH/NF) for biochar-assisted water electrolysis (BAWE). The composite catalyst significantly enhances the kinetics of the biochar oxidation reaction (BOR), delivering a low overpotential of 347 mV at 100 mA cm⁻², a small Tafel slope of 40.81 mV dec⁻¹, and exceptional durability over 50 h of continuous operation. Combined experimental and theoretical analyses reveal that the superior performance originates from interfacial electron redistribution, enlarged active surface area, accelerated charge transfer, and optimized adsorption energetics at the BFO-NiFe LDH interface. Post-reaction characterizations further demonstrate that the anodic process upgrades biochar into oxygen-enriched solid residues and value-added liquid chemicals, highlighting the dual-output capability of the system. This work provides an effective strategy for simultaneously achieving energy-saving hydrogen generation and biomass valorization, offering new insights into the design of advanced hybrid electrocatalysts for sustainable energy conversion.

开发可持续制氢的综合工艺与生物质增值相结合，对于推进碳中和经济至关重要。在此，我们报道了一种新型异质结构电催化剂，该电催化剂通过将铁电BiFeO3 （BFO）与NiFe层状双氢氧化物在泡沫镍上协同集成（BFO-NiFe LDH/NF）用于生物炭辅助水电解（BAWE）。复合催化剂显著提高了生物炭氧化反应（BOR）的动力学，在100 mA cm−2时提供了347 mV的低过电位，40.81 mV / dec−1的小塔菲斜率，并且在50小时的连续运行中具有出色的耐久性。结合实验和理论分析表明，BFO-NiFe LDH界面上的优异性能源于界面电子重分布、活性表面积增大、电荷转移加速和吸附能量优化。反应后表征进一步表明，阳极工艺将生物炭升级为富氧固体残留物和增值液体化学品，突出了系统的双输出能力。这项工作为同时实现节能制氢和生物质增值提供了有效的策略，为可持续能源转换的先进混合电催化剂的设计提供了新的见解。

{"title":"Synergistic integration of ferroelectric BiFeO3 and NiFe LDH for enhanced hydrogen production via biochar-assisted water electrolysis","authors":"Zhi Ying, Ruipeng Lei, Xinyue Chen, Xiaoyuan Zheng, Binlin Dou, Guomin Cui","doi":"10.1016/j.jpowsour.2026.239379","DOIUrl":"10.1016/j.jpowsour.2026.239379","url":null,"abstract":"<div><div>The development of integrated processes for sustainable hydrogen production coupled with biomass valorization is critical for advancing toward a carbon-neutral economy. Herein, we report a novel heterostructured electrocatalyst constructed by synergistically integrating ferroelectric BiFeO<sub>3</sub> (BFO) with NiFe layered double hydroxide on nickel foam (BFO-NiFe LDH/NF) for biochar-assisted water electrolysis (BAWE). The composite catalyst significantly enhances the kinetics of the biochar oxidation reaction (BOR), delivering a low overpotential of 347 mV at 100 mA cm<sup>−2</sup>, a small Tafel slope of 40.81 mV dec<sup>−1</sup>, and exceptional durability over 50 h of continuous operation. Combined experimental and theoretical analyses reveal that the superior performance originates from interfacial electron redistribution, enlarged active surface area, accelerated charge transfer, and optimized adsorption energetics at the BFO-NiFe LDH interface. Post-reaction characterizations further demonstrate that the anodic process upgrades biochar into oxygen-enriched solid residues and value-added liquid chemicals, highlighting the dual-output capability of the system. This work provides an effective strategy for simultaneously achieving energy-saving hydrogen generation and biomass valorization, offering new insights into the design of advanced hybrid electrocatalysts for sustainable energy conversion.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"668 ","pages":"Article 239379"},"PeriodicalIF":7.9,"publicationDate":"2026-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146024872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Adaptive shutdown drying of automotive PEM fuel cell systems using embedded impedance-based control 基于嵌入式阻抗控制的汽车PEM燃料电池系统自适应停机干燥

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-01-21 DOI: 10.1016/j.jpowsour.2026.239369

Rajendra Prasad Bandi

Residual water remaining in polymer electrolyte membrane (PEM) fuel cell stacks after shutdown can freeze during cold soak, leading to impaired freeze start performance and accelerated degradation. Conventional shutdown drying strategies rely on fixed parameter settings, which do not account for variability in operating conditions, stack aging, or ambient humidity. This article presents an adaptive shutdown drying strategy for automotive PEM fuel cell systems using an embedded impedance-based control approach. A resistance proxy derived from fixed-frequency electrochemical impedance measurements is employed as a supervisory state to guide drying actuation and termination. Experimental investigations on a fully integrated 70 kW automotive fuel cell power module demonstrate that resistance evolution correlates with cathode humidity gradients and correlates quantitatively with net water removal from the stack. An envelope-based resistance threshold combined with slope-guarded actuation enables robust drying termination across variations in air humidity, airflow, and coolant temperature, while avoiding excessive drying conditions associated with membrane stress. The proposed approach improves freeze-readiness robustness and provides a control-relevant alternative to fixed-time shutdown drying strategies suitable for automotive fuel cell applications.

在关闭后，残留在聚合物电解质膜（PEM）燃料电池堆中的剩余水会在冷浸过程中冻结，导致冻结启动性能受损，加速降解。传统的停机干燥策略依赖于固定的参数设置，而不考虑操作条件、堆老化或环境湿度的变化。本文提出了一种基于嵌入式阻抗控制方法的汽车PEM燃料电池系统自适应停机干燥策略。采用固定频率电化学阻抗测量得到的电阻代理作为监督状态来指导干燥的启动和终止。在一个完全集成的70千瓦汽车燃料电池电源模块上进行的实验研究表明，电阻演变与阴极湿度梯度相关，并与堆的净水去除量相关。基于包膜的阻力阈值与斜坡保护驱动相结合，可以在空气湿度、气流和冷却剂温度的变化中实现稳健的干燥终止，同时避免与膜应力相关的过度干燥条件。所提出的方法提高了冷冻准备鲁棒性，并为适用于汽车燃料电池应用的固定时间停机干燥策略提供了一种与控制相关的替代方案。

{"title":"Adaptive shutdown drying of automotive PEM fuel cell systems using embedded impedance-based control","authors":"Rajendra Prasad Bandi","doi":"10.1016/j.jpowsour.2026.239369","DOIUrl":"10.1016/j.jpowsour.2026.239369","url":null,"abstract":"<div><div>Residual water remaining in polymer electrolyte membrane (PEM) fuel cell stacks after shutdown can freeze during cold soak, leading to impaired freeze start performance and accelerated degradation. Conventional shutdown drying strategies rely on fixed parameter settings, which do not account for variability in operating conditions, stack aging, or ambient humidity. This article presents an adaptive shutdown drying strategy for automotive PEM fuel cell systems using an embedded impedance-based control approach. A resistance proxy derived from fixed-frequency electrochemical impedance measurements is employed as a supervisory state to guide drying actuation and termination. Experimental investigations on a fully integrated 70 kW automotive fuel cell power module demonstrate that resistance evolution correlates with cathode humidity gradients and correlates quantitatively with net water removal from the stack. An envelope-based resistance threshold combined with slope-guarded actuation enables robust drying termination across variations in air humidity, airflow, and coolant temperature, while avoiding excessive drying conditions associated with membrane stress. The proposed approach improves freeze-readiness robustness and provides a control-relevant alternative to fixed-time shutdown drying strategies suitable for automotive fuel cell applications.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"668 ","pages":"Article 239369"},"PeriodicalIF":7.9,"publicationDate":"2026-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146025294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Carbon-confined Ni@NiO nanoparticles anchored on rGO: A dual carbon architecture for long-cycle-life supercapacitors 锚定在氧化石墨烯上的碳约束Ni@NiO纳米颗粒：长循环寿命超级电容器的双碳结构

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-01-21 DOI: 10.1016/j.jpowsour.2026.239378

Rizwan Khan , Shufeng Bo , Junmei Luo , Jun Kang , Jun Beom Kim

Carbon-confined, NiO-encapsulated Ni nanoparticles (Ni@NiO) anchored on a reduced graphene oxide layer (C-Ni@NiO/rGO composite) were investigated to simultaneously enhance capacitance and long-term stability in supercapacitors, and their formation mechanism was also elucidated. The composite was synthesized via solvothermal treatment followed by carbonization, producing a dual-carbon framework that confines Ni@NiO nanoparticles. The dual-carbon protection system effectively buffered volumetric fluctuations, improved electrical conductivity, and mitigated nanoparticle aggregation. Benefiting from this characteristic architecture, our C-Ni@NiO/rGO electrode achieved a specific capacitance of 1108.2 F g⁻¹ at 1 A g⁻¹ and retained 96.3 % of its capacitance after 10,000 cycles, demonstrating its potential as a robust and high-performance electrode platform for next-generation supercapacitors.

研究了锚定在还原氧化石墨烯层（C-Ni@NiO/rGO复合材料）上的碳约束镍包覆镍纳米粒子（Ni@NiO），以同时增强超级电容器的电容和长期稳定性，并阐明了它们的形成机制。该复合材料通过溶剂热处理和碳化合成，产生限制Ni@NiO纳米颗粒的双碳框架。双碳保护系统有效地缓冲了体积波动，提高了导电性，减轻了纳米颗粒聚集。得益于这一特性架构，我们的C-Ni@NiO/rGO电极在1 a g−1时的比电容达到1108.2 F g−1，并在10,000次循环后保持了96.3%的电容，显示了其作为下一代超级电容器强大的高性能电极平台的潜力。

引用次数: 0

Investigation of gas-liquid two-phase flow on the power-generation process of air-breathing microfluidic fuel cell 吸气式微流体燃料电池发电过程的气液两相流研究

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-01-21 DOI: 10.1016/j.jpowsour.2026.239384

Minyue Yan , Xun Zhu , Dingding Ye , Xuefeng He , Yuan Zhou , Yang Yang , Qiang Liao

Air-breathing microfluidic fuel cells (AMFCs) are considered promising micro power sources due to their competitive cell performance, easy integration, and wide range of applications. However, the gas-liquid two-phase flow mechanism in AMFCs remains unclear. In this work, we propose a novel AMFC that enables high-resolution in-situ observation of the dynamic behavior of gas-liquid two-phase flow within the microchannel. A comprehensive analysis is conducted using mechanical models to investigate the cell performance and two-phase flow behaviors under various conditions, including wettability, flow rates, slant angles and the catalyst loading. Additionally, the influence mechanism of anodic pore size on bubble escape behavior is analyzed. We optimize cell power generation, discharge stability and two-phase flow under conditions of a hydrophilic channel, high flow rate and a 90° slant angle. For the porous anode, increasing the catalyst loading reduces the pore size of the anode surface, which is beneficial to promoting the detachment of small bubbles, thereby enhancing fuel transport, power generation and cell stability. This work provides the new insight into understanding the effects of gas-liquid two-phase flow on cell performance to improve the stability of power generation.

吸气式微流体燃料电池（amfc）因其具有竞争力的电池性能、易于集成和广泛的应用范围而被认为是有前途的微电源。然而，amfc中的气液两相流动机理尚不清楚。在这项工作中，我们提出了一种新的AMFC，可以高分辨率地观察微通道内气液两相流的动态行为。利用力学模型对不同条件下的电池性能和两相流行为进行了综合分析，包括润湿性、流速、倾斜角度和催化剂负载。此外，还分析了阳极孔径对气泡逃逸行为的影响机理。我们在亲水性通道、高流速和90°斜角条件下优化了电池的发电、放电稳定性和两相流动。对于多孔阳极来说，增加催化剂的负载减小了阳极表面的孔径，有利于促进小气泡的脱离，从而增强燃料输送、发电和电池的稳定性。这项工作为理解气液两相流对电池性能的影响提供了新的见解，以提高发电的稳定性。

{"title":"Investigation of gas-liquid two-phase flow on the power-generation process of air-breathing microfluidic fuel cell","authors":"Minyue Yan , Xun Zhu , Dingding Ye , Xuefeng He , Yuan Zhou , Yang Yang , Qiang Liao","doi":"10.1016/j.jpowsour.2026.239384","DOIUrl":"10.1016/j.jpowsour.2026.239384","url":null,"abstract":"<div><div>Air-breathing microfluidic fuel cells (AMFCs) are considered promising micro power sources due to their competitive cell performance, easy integration, and wide range of applications. However, the gas-liquid two-phase flow mechanism in AMFCs remains unclear. In this work, we propose a novel AMFC that enables high-resolution in-situ observation of the dynamic behavior of gas-liquid two-phase flow within the microchannel. A comprehensive analysis is conducted using mechanical models to investigate the cell performance and two-phase flow behaviors under various conditions, including wettability, flow rates, slant angles and the catalyst loading. Additionally, the influence mechanism of anodic pore size on bubble escape behavior is analyzed. We optimize cell power generation, discharge stability and two-phase flow under conditions of a hydrophilic channel, high flow rate and a 90° slant angle. For the porous anode, increasing the catalyst loading reduces the pore size of the anode surface, which is beneficial to promoting the detachment of small bubbles, thereby enhancing fuel transport, power generation and cell stability. This work provides the new insight into understanding the effects of gas-liquid two-phase flow on cell performance to improve the stability of power generation.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"668 ","pages":"Article 239384"},"PeriodicalIF":7.9,"publicationDate":"2026-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146025292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Coupling super-delocalized sulfonimide anions with inorganic nanofillers for better composite polymer electrolytes: (II) interphases with lithium metal electrode 超离域磺酰亚胺阴离子与无机纳米填料偶联制备更好的复合聚合物电解质：（II）与锂金属电极的界面相

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-01-21 DOI: 10.1016/j.jpowsour.2026.239339

Jiaxun Yang , Xinxin Zhang , Guanjun Cen , Pu Li , Qixin Wang , Wenfang Feng , Hailong Yu , Michel Armand , Xuejie Huang , Zhibin Zhou , Heng Zhang

The synergy between salt anion and inorganic fillers can effectively modulate the basic properties of composite polymer electrolytes (CPEs). In this work, we herein continue the exploration of the chemical and electrochemical stability of the CPEs comprising a super anion (i.e., sTFSI⁻) and nano-sized alumina against lithium metal (Li°) electrode, and systematically investigate the cycling stability of the Li° electrode, Li° deposition morphology, and surface composition of the as-formed interphases. Our results suggest significant differences in the interfacial behavior of the sTFSI-based CPEs in comparison to the classic sulfonimide [i.e., bis(trifluoromethanesulfonyl)imide anion, TFSI⁻] systems, primarily due to the distinct interaction mechanisms for two anions with different characteristics. Benefiting from the inherent strong negative charge delocalization of sTFSI⁻ anion, it possesses greater reduction stability in the presence of inorganic fillers and plays a dominant role in the interfacial reactions on Li° surface, supporting superior cycle life for Li° electrode and more uniform deposition morphology. This work reveals the critical role of anions and inorganic fillers in modulating the interfacial reactions and film-formation processes between polymer electrolyte and negative electrode, providing important insights for enhancing the performances of solid-state batteries, not limited to lithium systems.

盐阴离子与无机填料之间的协同作用可以有效地调节复合聚合物电解质的基本性能。在这项工作中，我们继续探索由超阴离子（即sTFSI -）和纳米级氧化铝组成的cpe对锂金属（Li°）电极的化学和电化学稳定性，并系统地研究了Li°电极的循环稳定性、Li°沉积形貌和形成界面的表面组成。我们的研究结果表明，与经典的磺酰亚胺[即双（三氟甲磺酰基）亚胺阴离子，TFSI-]系统相比，stfsi基cpe的界面行为存在显著差异，这主要是由于两种阴离子具有不同的相互作用机制。得益于sTFSI -阴离子固有的强负电荷离域特性，它在无机填料存在下具有更强的还原稳定性，在Li°表面的界面反应中起主导作用，使得Li°电极具有更长的循环寿命和更均匀的沉积形貌。这项工作揭示了阴离子和无机填料在调节聚合物电解质和负极之间的界面反应和成膜过程中的关键作用，为提高固态电池（不限于锂系统）的性能提供了重要见解。

{"title":"Coupling super-delocalized sulfonimide anions with inorganic nanofillers for better composite polymer electrolytes: (II) interphases with lithium metal electrode","authors":"Jiaxun Yang , Xinxin Zhang , Guanjun Cen , Pu Li , Qixin Wang , Wenfang Feng , Hailong Yu , Michel Armand , Xuejie Huang , Zhibin Zhou , Heng Zhang","doi":"10.1016/j.jpowsour.2026.239339","DOIUrl":"10.1016/j.jpowsour.2026.239339","url":null,"abstract":"<div><div>The synergy between salt anion and inorganic fillers can effectively modulate the basic properties of composite polymer electrolytes (CPEs). In this work, we herein continue the exploration of the chemical and electrochemical stability of the CPEs comprising a super anion (i.e., sTFSI<sup>−</sup>) and nano-sized alumina against lithium metal (Li°) electrode, and systematically investigate the cycling stability of the Li° electrode, Li° deposition morphology, and surface composition of the as-formed interphases. Our results suggest significant differences in the interfacial behavior of the sTFSI-based CPEs in comparison to the classic sulfonimide [i.e., bis(trifluoromethanesulfonyl)imide anion, TFSI<sup>−</sup>] systems, primarily due to the distinct interaction mechanisms for two anions with different characteristics. Benefiting from the inherent strong negative charge delocalization of sTFSI<sup>−</sup> anion, it possesses greater reduction stability in the presence of inorganic fillers and plays a dominant role in the interfacial reactions on Li° surface, supporting superior cycle life for Li° electrode and more uniform deposition morphology. This work reveals the critical role of anions and inorganic fillers in modulating the interfacial reactions and film-formation processes between polymer electrolyte and negative electrode, providing important insights for enhancing the performances of solid-state batteries, not limited to lithium systems.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"668 ","pages":"Article 239339"},"PeriodicalIF":7.9,"publicationDate":"2026-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146025319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-performance composite electrolytes for solid-state lithium metal batteries: Enhancing ionic conductivity and interfacial compatibility through polyvinylpyrrolidone blending and inorganic filler incorporation 用于固态锂金属电池的高性能复合电解质：通过聚乙烯吡咯烷酮的混合和无机填料的掺入，增强离子电导率和界面相容性

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-01-21 DOI: 10.1016/j.jpowsour.2026.239382

Pratiksha Gami, Sunil Kumar

One of the significant challenges in advancing safe and high-energy-density solid-state lithium metal batteries is achieving high ionic conductivities and ensuring good interfacial compatibility between the solid electrolyte and the electrodes. To address these challenges, the study proposes a composite electrolyte that is made through a solution casting method, utilizing polyvinylidene fluoride hexafluorophosphate (PVDF-HFP) and polyvinylpyrrolidone (PVP) in conjunction with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salt and mid-entropy inorganic filler Li_1.5Sn_1.0Al_0.5Zr_0.5(PO₄)₃. The polymer blend with an optimized ceramic filler exhibits an exceptional room-temperature ionic conductivity 1.48 × 10⁻⁴ S cm⁻¹, a significantly high Li-ion transference number of 0.74, and shows electrochemical stability up to 4.58 V. The symmetric Li||Li cell fabricated with the composite electrolyte exhibits uniform Li⁺ deposition/stripping for over >500 h at 2 mA cm⁻². Further, a full cell with LiFePO₄ cathode and lithium anode is fabricated and shows excellent electrochemical performance with 78% capacity retention after 1000 cycles at 2C. The findings from this study advance the development of practical inorganic polymer electrolytes for fast-charging lithium batteries.

提高安全性和高能量密度固态锂金属电池的重大挑战之一是实现高离子电导率和确保固体电解质与电极之间良好的界面相容性。为了解决这些挑战，本研究提出了一种复合电解质，该电解质采用溶液铸造法，利用聚偏氟六氟磷酸盐（PVDF-HFP）和聚乙烯吡罗烷酮（PVP）结合双（三氟甲烷磺酰）亚胺锂（LiTFSI）盐和中熵无机填料Li1.5Sn1.0Al0.5Zr0.5(PO4)3制成。经过优化的陶瓷填料的聚合物共混物具有优异的室温离子电导率1.48 × 10−4 S cm−1，锂离子转移数0.74，电化学稳定性高达4.58 V。用复合电解质制备的对称Li||锂电池在2 mA cm−2下表现出均匀的Li+沉积/剥离超过500 h。此外，制备了以LiFePO4为阴极和锂为阳极的全电池，在2C下循环1000次后，电池容量保持率达到78%。这项研究的发现促进了用于快速充电锂电池的实用无机聚合物电解质的发展。

{"title":"High-performance composite electrolytes for solid-state lithium metal batteries: Enhancing ionic conductivity and interfacial compatibility through polyvinylpyrrolidone blending and inorganic filler incorporation","authors":"Pratiksha Gami, Sunil Kumar","doi":"10.1016/j.jpowsour.2026.239382","DOIUrl":"10.1016/j.jpowsour.2026.239382","url":null,"abstract":"<div><div>One of the significant challenges in advancing safe and high-energy-density solid-state lithium metal batteries is achieving high ionic conductivities and ensuring good interfacial compatibility between the solid electrolyte and the electrodes. To address these challenges, the study proposes a composite electrolyte that is made through a solution casting method, utilizing polyvinylidene fluoride hexafluorophosphate (PVDF-HFP) and polyvinylpyrrolidone (PVP) in conjunction with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salt and mid-entropy inorganic filler Li<sub>1.5</sub>Sn<sub>1.0</sub>Al<sub>0.5</sub>Zr<sub>0.5</sub>(PO<sub>4</sub>)<sub>3</sub>. The polymer blend with an optimized ceramic filler exhibits an exceptional room-temperature ionic conductivity 1.48 × 10<sup>−4</sup> S cm<sup>−1</sup>, a significantly high Li-ion transference number of 0.74, and shows electrochemical stability up to 4.58 V. The symmetric Li||Li cell fabricated with the composite electrolyte exhibits uniform Li<sup>+</sup> deposition/stripping for over >500 h at 2 mA cm<sup>−2</sup>. Further, a full cell with LiFePO<sub>4</sub> cathode and lithium anode is fabricated and shows excellent electrochemical performance with 78% capacity retention after 1000 cycles at 2C. The findings from this study advance the development of practical inorganic polymer electrolytes for fast-charging lithium batteries.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"668 ","pages":"Article 239382"},"PeriodicalIF":7.9,"publicationDate":"2026-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146025395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anion-dominant coordinated weakly solvating ether electrolyte for silicon anodes 硅阳极用阴离子优势配位弱溶剂化醚电解质

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-01-21 DOI: 10.1016/j.jpowsour.2026.239374

Dain Kim , Juyeon Han , Subeen Park , Hyunjin Kim , Jeeyoung Yoo

Silicon anodes, with theoretical capacity of 3579 mAh g⁻¹, enable high-energy lithium-ion batteries but suffer from large volume change and unstable solid-electrolyte interphases (SEIs). We design a weakly solvating ether electrolyte—2 M LiFSI in ethylene glycol dibutyl ether (EGDE)—that stabilises micro-Si by tuning Li⁺ coordination to reduce solvent participation and increase anion accessibility. Operando Raman spectroscopy and molecular-dynamics modelling reveal an anion-dominated solvation structure (CIP + AGG = 78.7 %) that lowers Li⁺–solvent binding free energy and accelerates desolvation. In this weak-solvation regime, FSI⁻ co-migrates with Li⁺ and reduces at the anode/electrolyte interface, forming a LiF-rich inorganic SEI with improved chemo-mechanical integrity. EGDE affords weaker Li⁺–solvent interactions, faster charge-transfer kinetics, and lower desolvation barriers than DME and DGDE, promoting interfacial transport while suppressing side reactions. mSi‖Li half-cells deliver 1512 mAh g⁻¹ with an initial Coulombic efficiency of 80.3 % and sustain >99 % efficiency for 100 cycles. mSi‖NCM811 full cells provide 136.7 mAh g⁻¹ at 0.2 C and show superior life over 50 cycles. This coordination-centric strategy decouples capacity fade from repeated SEI repair, mitigating electrolyte depletion and particle fracture in micro-Si. EGDE offers a fluorine-additive-free route to inorganic-rich SEI formation and guides electrolyte design for next-generation high-energy lithium-ion batteries.

硅阳极的理论容量为3579 mAh g−1，可实现高能锂离子电池，但存在体积变化大、固-电解质界面不稳定等问题。我们设计了一种弱溶剂化醚电解质-乙二醇二丁基醚（EGDE）中的2 M LiFSI -通过调整Li+配位来减少溶剂参与和增加阴离子可及性来稳定微si。Operando拉曼光谱和分子动力学模型揭示了阴离子主导的溶剂化结构（CIP + AGG = 78.7%），降低了Li+溶剂的结合自由能，加速了脱溶。在这种弱溶剂化状态下，FSI−与Li+共迁移，并在阳极/电解质界面处还原，形成富liff的无机SEI，具有更好的化学机械完整性。与二甲醚和DGDE相比，EGDE具有更弱的Li+ -溶剂相互作用、更快的电荷转移动力学和更低的脱溶势垒，促进了界面传输，同时抑制了副反应。mSi‖Li半电池提供1512 mAh g−1，初始库仑效率为80.3%，并在100次循环中保持99%的效率。mSi‖NCM811全电池在0.2℃时提供136.7 mAh g−1，并显示超过50次循环的优越寿命。这种以协调为中心的策略消除了重复SEI修复造成的容量衰减，减轻了电解液损耗和微硅颗粒断裂。EGDE提供了一种不含氟添加剂的富无机SEI形成途径，并指导下一代高能锂离子电池的电解质设计。

{"title":"Anion-dominant coordinated weakly solvating ether electrolyte for silicon anodes","authors":"Dain Kim , Juyeon Han , Subeen Park , Hyunjin Kim , Jeeyoung Yoo","doi":"10.1016/j.jpowsour.2026.239374","DOIUrl":"10.1016/j.jpowsour.2026.239374","url":null,"abstract":"<div><div>Silicon anodes, with theoretical capacity of 3579 mAh g<sup>−1</sup>, enable high-energy lithium-ion batteries but suffer from large volume change and unstable solid-electrolyte interphases (SEIs). We design a weakly solvating ether electrolyte—2 M LiFSI in ethylene glycol dibutyl ether (EGDE)—that stabilises micro-Si by tuning Li<sup>+</sup> coordination to reduce solvent participation and increase anion accessibility. Operando Raman spectroscopy and molecular-dynamics modelling reveal an anion-dominated solvation structure (CIP + AGG = 78.7 %) that lowers Li<sup>+</sup>–solvent binding free energy and accelerates desolvation. In this weak-solvation regime, FSI<sup>−</sup> co-migrates with Li<sup>+</sup> and reduces at the anode/electrolyte interface, forming a LiF-rich inorganic SEI with improved chemo-mechanical integrity. EGDE affords weaker Li<sup>+</sup>–solvent interactions, faster charge-transfer kinetics, and lower desolvation barriers than DME and DGDE, promoting interfacial transport while suppressing side reactions. mSi‖Li half-cells deliver 1512 mAh g<sup>−1</sup> with an initial Coulombic efficiency of 80.3 % and sustain >99 % efficiency for 100 cycles. mSi‖NCM811 full cells provide 136.7 mAh g<sup>−1</sup> at 0.2 C and show superior life over 50 cycles. This coordination-centric strategy decouples capacity fade from repeated SEI repair, mitigating electrolyte depletion and particle fracture in micro-Si. EGDE offers a fluorine-additive-free route to inorganic-rich SEI formation and guides electrolyte design for next-generation high-energy lithium-ion batteries.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"668 ","pages":"Article 239374"},"PeriodicalIF":7.9,"publicationDate":"2026-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146025150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Atomistically configured niobium latticed biographite structure for high performance lithium-ion batteries 用于高性能锂离子电池的原子配置铌晶格传记结构

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-01-21 DOI: 10.1016/j.jpowsour.2026.239371

Ianca Oliveira Borges , Otávio Augusto Titton Dias , Akhil K. Nair , Carlos M. Da Silva , Cristina H. Amon , Anand Ramesh Sanadi , Gustavo Henrique Denzin Tonoli , Mohini Sain

A sustainable, highly graphitic lithium-ion battery (LIB) anode material was developed by doping biographite derived from coffee husks with niobium (Nb), significantly enhancing electronic conductivity and electrochemical performance. Lattice-engineered biocarbon (BC) doped with Nb exhibited excellent electrochemical performance, delivering a high specific discharge capacity of 375 mAh g⁻¹ at a 0.2C rate and showcasing remarkable rate capability, highlighting the superior electrochemical properties of BG-based materials. Experimental and computational structural analysis revealed that the intrinsic porous network of BG enhances LIB diffusion, while Nb doping significantly improves electrical conductivity, introduces additional redox-active sites, and increases energy density. To assess scalability, a full LIB cell incorporating the BG anode and an NMC cathode was successfully assembled, demonstrating the potential of this material for practical applications beyond half-cell lab tests. These findings position Nb-doped BC as a strong candidate for next-generation LIB anodes, contributing to the development of high-capacity, durable, and more environmentally sustainable energy storage systems.

利用咖啡壳中提取的传记石掺杂铌，制备了一种可持续的高石墨化锂离子电池负极材料，显著提高了电池的电导率和电化学性能。掺杂Nb的晶格工程生物碳（BC）具有优异的电化学性能，在0.2C倍率下具有375 mAh g−1的高比放电容量，显示出显著的倍率性能，凸显了bg基材料优越的电化学性能。实验和计算结构分析表明，BG的固有多孔网络增强了LIB的扩散，而Nb的掺杂显著提高了电导率，引入了额外的氧化还原活性位点，并增加了能量密度。为了评估可扩展性，成功组装了一个包含BG阳极和NMC阴极的完整LIB电池，展示了这种材料在半电池实验室测试之外的实际应用潜力。这些发现将铌掺杂的BC定位为下一代锂离子电池阳极的有力候选者，有助于开发高容量、耐用、更环保的储能系统。

{"title":"Atomistically configured niobium latticed biographite structure for high performance lithium-ion batteries","authors":"Ianca Oliveira Borges , Otávio Augusto Titton Dias , Akhil K. Nair , Carlos M. Da Silva , Cristina H. Amon , Anand Ramesh Sanadi , Gustavo Henrique Denzin Tonoli , Mohini Sain","doi":"10.1016/j.jpowsour.2026.239371","DOIUrl":"10.1016/j.jpowsour.2026.239371","url":null,"abstract":"<div><div>A sustainable, highly graphitic lithium-ion battery (LIB) anode material was developed by doping biographite derived from coffee husks with niobium (Nb), significantly enhancing electronic conductivity and electrochemical performance. Lattice-engineered biocarbon (BC) doped with Nb exhibited excellent electrochemical performance, delivering a high specific discharge capacity of 375 mAh g<sup>−1</sup> at a 0.2C rate and showcasing remarkable rate capability, highlighting the superior electrochemical properties of BG-based materials. Experimental and computational structural analysis revealed that the intrinsic porous network of BG enhances LIB diffusion, while Nb doping significantly improves electrical conductivity, introduces additional redox-active sites, and increases energy density. To assess scalability, a full LIB cell incorporating the BG anode and an NMC cathode was successfully assembled, demonstrating the potential of this material for practical applications beyond half-cell lab tests. These findings position Nb-doped BC as a strong candidate for next-generation LIB anodes, contributing to the development of high-capacity, durable, and more environmentally sustainable energy storage systems.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"668 ","pages":"Article 239371"},"PeriodicalIF":7.9,"publicationDate":"2026-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146025148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Deconvoluting silicon-graphite electrode degradation using acoustic emission and wavelet analysis 基于声发射和小波分析的反卷积硅石墨电极降解

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-01-21 DOI: 10.1016/j.jpowsour.2026.239370

Lukas Noll , Valentin Ruess , Daniel Schröder

This study applies acoustic emission (AE) analysis to identify degradation mechanisms in silicon–graphite composite electrodes during electrochemical cycling. A Random Forest model, originally trained on completely unrelated graphite-based degradation data, was successfully transferred to the silicon-graphite system using wavelet-derived features. Our approach increased classification results by 25 % compared to conventional FFT-based analysis, with 65 % of AE events classified at a confidence above 75 %. The results show that the majority of detectable AE activity can be attributed to fractures of the silicon particles, particularly during first lithiation and subsequent delithiation. Only a minor proportion arises from gas evolution. Wavelet analysis revealed distinct spectral signatures for these mechanisms, confirming that we are able to separate the processes with our analysis. Further, the cross-compositional applicability of the model demonstrates the robustness of wavelet-based AE classification. These findings highlight the potential of AE sensing combined with machine learning as a non-invasive, interpretable diagnostic tool for detecting degradation in real time for many further material classes. Potentially, the tool can be integrated into battery management systems for predictive maintenance and health monitoring.

本研究利用声发射（AE）分析方法确定了电化学循环过程中硅-石墨复合电极的降解机制。随机森林模型最初是在完全不相关的石墨降解数据上训练的，利用小波衍生的特征成功地转移到硅-石墨系统中。与传统的基于fft的分析相比，我们的方法将分类结果提高了25%，65%的AE事件分类置信度高于75%。结果表明，大部分可探测到的声发射活动可归因于硅颗粒的断裂，特别是在第一次锂化和随后的剥蚀过程中。只有一小部分来自气体演化。小波分析揭示了这些机制的不同光谱特征，证实了我们能够通过分析分离这些过程。此外，该模型的跨组合适用性证明了基于小波的声发射分类的鲁棒性。这些发现突出了声发射传感与机器学习相结合的潜力，作为一种非侵入性、可解释的诊断工具，可用于实时检测许多其他材料类别的降解。该工具还可以集成到电池管理系统中，用于预测性维护和健康监测。

{"title":"Deconvoluting silicon-graphite electrode degradation using acoustic emission and wavelet analysis","authors":"Lukas Noll , Valentin Ruess , Daniel Schröder","doi":"10.1016/j.jpowsour.2026.239370","DOIUrl":"10.1016/j.jpowsour.2026.239370","url":null,"abstract":"<div><div>This study applies acoustic emission (AE) analysis to identify degradation mechanisms in silicon–graphite composite electrodes during electrochemical cycling. A Random Forest model, originally trained on completely unrelated graphite-based degradation data, was successfully transferred to the silicon-graphite system using wavelet-derived features. Our approach increased classification results by 25 % compared to conventional FFT-based analysis, with 65 % of AE events classified at a confidence above 75 %. The results show that the majority of detectable AE activity can be attributed to fractures of the silicon particles, particularly during first lithiation and subsequent delithiation. Only a minor proportion arises from gas evolution. Wavelet analysis revealed distinct spectral signatures for these mechanisms, confirming that we are able to separate the processes with our analysis. Further, the cross-compositional applicability of the model demonstrates the robustness of wavelet-based AE classification. These findings highlight the potential of AE sensing combined with machine learning as a non-invasive, interpretable diagnostic tool for detecting degradation in real time for many further material classes. Potentially, the tool can be integrated into battery management systems for predictive maintenance and health monitoring.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"668 ","pages":"Article 239370"},"PeriodicalIF":7.9,"publicationDate":"2026-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146025394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation study of electro-thermal characteristics of cobalt-free lithium battery based on electrochemical-thermal coupling model 基于电化学-热耦合模型的无钴锂电池电热特性仿真研究

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-01-20 DOI: 10.1016/j.jpowsour.2026.239340

Ying Liu, Yanfei Li, Xin Zhang

An electrochemical-thermal coupling model based on COMSOL is developed to study the new cobalt-free lithium battery's changing electro-thermal characteristics under various charge-discharge rates and ambient temperature conditions. The simulated results are then compared to cobalt-containing lithium batteries to examine the impact of the battery's anode material on its characteristics. It is found that in the cobalt-free lithium battery, the degree of voltage drop at the start of the discharge is smaller than in the cobalt-containing lithium batteries; the charging time is shorter; the temperature change is larger; the temperature is higher than in the cobalt-containing lithium batteries under various ambient temperatures; the final temperature of the cobalt-free lithium batteries is higher than in the cobalt-containing lithium batteries by 0–5 °C; and the instability of the battery is found to be exacerbated by the high charge-discharge rate and high-temperature environment. Cobalt-free lithium batteries show excellent cycle stability, retaining 82 % of their capacity after 600 cycles at a 1C rate. This study discusses methods to optimize cobalt-free lithium-ion battery cathode materials, combining research on cathode material modification. This study is of great significance in further investigating the thermal management of new cobalt-free lithium batteries.

为了研究新型无钴锂电池在不同充放电速率和环境温度条件下的电热特性变化，建立了基于COMSOL的电化学-热耦合模型。然后将模拟结果与含钴锂电池进行比较，以检查电池阳极材料对其特性的影响。研究发现，在无钴锂电池中，放电开始时的电压下降程度小于含钴锂电池；充电时间更短；温度变化较大；温度高于含钴锂电池在各种环境温度下的温度；无钴锂电池的最终温度比含钴锂电池高0-5℃；高充放电率和高温环境加剧了电池的不稳定性。无钴锂电池表现出出色的循环稳定性，在1C倍率下循环600次后仍能保持82%的容量。本研究结合正极材料改性的研究，探讨了无钴锂离子电池正极材料的优化方法。本研究对进一步研究新型无钴锂电池的热管理具有重要意义。

{"title":"Simulation study of electro-thermal characteristics of cobalt-free lithium battery based on electrochemical-thermal coupling model","authors":"Ying Liu, Yanfei Li, Xin Zhang","doi":"10.1016/j.jpowsour.2026.239340","DOIUrl":"10.1016/j.jpowsour.2026.239340","url":null,"abstract":"<div><div>An electrochemical-thermal coupling model based on COMSOL is developed to study the new cobalt-free lithium battery's changing electro-thermal characteristics under various charge-discharge rates and ambient temperature conditions. The simulated results are then compared to cobalt-containing lithium batteries to examine the impact of the battery's anode material on its characteristics. It is found that in the cobalt-free lithium battery, the degree of voltage drop at the start of the discharge is smaller than in the cobalt-containing lithium batteries; the charging time is shorter; the temperature change is larger; the temperature is higher than in the cobalt-containing lithium batteries under various ambient temperatures; the final temperature of the cobalt-free lithium batteries is higher than in the cobalt-containing lithium batteries by 0–5 °C; and the instability of the battery is found to be exacerbated by the high charge-discharge rate and high-temperature environment. Cobalt-free lithium batteries show excellent cycle stability, retaining 82 % of their capacity after 600 cycles at a 1C rate. This study discusses methods to optimize cobalt-free lithium-ion battery cathode materials, combining research on cathode material modification. This study is of great significance in further investigating the thermal management of new cobalt-free lithium batteries.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"668 ","pages":"Article 239340"},"PeriodicalIF":7.9,"publicationDate":"2026-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146025149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0