Journal of Power Sources最新文献_第9页

Two-dimensional molybdenum carbide integrated cobalt iron phosphorus trisulfides derived from Prussian blue analogues for bifunctional electrocatalysis 二维碳化钼集成钴铁磷三硫化物衍生自普鲁士蓝类似物双功能电催化

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.2026.239354

Yun-Hsin Chen , Subbiramaniyan Kubendhiran , Chen-Han Lin , Lu-Yin Lin , Kuo-Chuan Ho

To overcome the sluggish kinetics of electrocatalytic water splitting and advance the hydrogen economy with a sustainable process, it's imperative to search for efficient, cost-effective, and durable nonprecious-metal electrocatalysts. Benefiting from well-defined and porous structures, rich compositional variety, and carbon and nitrogen-containing frameworks, Prussian blue analogues (PBAs) have been recognized as promising templates for a myriad of electrochemical applications. Herein, cobalt- and iron-based PBA (CoFe PBA) derived bimetallic phosphorous trisulfide on molybdenum carbide MXene (PS₃-CoFe/MXene) is firstly proposed as a highly promising electrocatalyst to facilitate oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). Taking comprehensive advantages of augmented electrical conductivity and intrinsic properties from MXene, the uniform dispersion of catalytically active PS₃-CoFe/MXene can provide abundant electroactive sites during catalytic processes. It is found that the PS₃-CoFe/MXene possesses competitive HER and OER activities, respectively, with overpotentials of 146 and 240 mV at 10 mA cm⁻² in 1.0 M KOH, outperforming single phosphide or sulfide counterparts. Furthermore, it only takes 1.64 V to deliver a current density of 10 mA cm⁻² and preserves superior long-term stability for at least 120 h under overall water splitting, which implies that the PS₃-CoFe/MXene holds great promise in water splitting applications.

为了克服电催化水分解的缓慢动力学，以可持续的过程推进氢经济，寻找高效、经济、耐用的非贵金属电催化剂势在必行。普鲁士蓝类似物（PBAs）具有良好定义的多孔结构，丰富的成分多样性以及含碳和含氮框架，已被认为是无数电化学应用的有前途的模板。本文首次提出了钴基和铁基PBA （CoFe PBA）衍生的碳化钼MXene上的双金属三硫化磷（PS3-CoFe/MXene）作为一种极有前途的电催化剂来促进析氧反应（OER）和析氢反应（HER）。利用MXene增强的电导率和本征性质的综合优势，催化活性PS3-CoFe/MXene的均匀分散可以在催化过程中提供丰富的电活性位点。结果发现，PS3-CoFe/MXene具有竞争性的HER和OER活性，在1.0 M KOH条件下，在10 mA cm−2条件下的过电位为146 mV和240 mV，优于单一磷化物或硫化物。此外，仅需要1.64 V就可以提供10 mA cm - 2的电流密度，并在整体水分解下保持至少120小时的长期稳定性，这意味着PS3-CoFe/MXene在水分解应用中具有很大的前景。

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引用次数: 0

Strategies for improving the electrosynthesis activity and selectivity of hydrogen peroxide production with metal-free catalysts 提高无金属催化剂过氧化氢电合成活性和选择性的策略

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.2026.239367

Mingyang Ma , Cui Lai , Huchuan Yan , Xiuqin Huo , Dengsheng Ma , Tao Tong , Lei Wu , Wenjun Wang , Lei Qin , Yukui Fu

Electrocatalytic production of H₂O₂ via two-electron oxygen reduction reaction (2e⁻ ORR) is a promising process to substitute traditional anthraquinone process, which is limited by the selective two-electron reaction and limited O₂/H⁺ mass transfer. In the past years, carbon-based metal-free catalysts and emerging materials (covalent organic framework and conductive polymers etc.) have been widely developed for efficiently catalyzing 2e⁻ ORR, due to its easy availability, high specific surface area and easily adjustable structure. Although carbon-based metal-free catalysts and emerging materials have been tuned to impart new properties and functions by adjusting electron transfer and improving mass transfer, the obscure design and catalytic mechanism impedes the further development of H₂O₂ electrosynthesis. Thus, in this paper, the modification methods of metal-free catalysts, including carbon-based materials and emerging materials, are summarized from the perspective of regulating electron transfer. Then, the electrode structure and reactor design are listed from the view of improving mass transfer. Finally, other technologies assisting electrocatalytic production of H₂O₂ are summarized and the challenge and prospect are also put forward. Here, we believe that this review can provide a good foundation for the development and application of electrocatalyst in the future.

电催化双电子氧还原反应（2e - ORR）生产H2O2是替代传统蒽醌工艺的一种很有前途的工艺，传统工艺受限于选择性双电子反应和有限的O2/H+传质。近年来，碳基无金属催化剂和新兴材料（共价有机骨架和导电聚合物等）因其易于获得、高比表面积和易于调节的结构而得到了广泛的发展，以高效催化2e - ORR。虽然碳基无金属催化剂和新兴材料已经通过调整电子转移和改善传质来赋予新的性能和功能，但模糊的设计和催化机制阻碍了H2O2电合成的进一步发展。因此，本文从调节电子转移的角度对无金属催化剂的改性方法进行了综述，包括碳基材料和新兴材料。然后，从提高传质的角度出发，列举了电极结构和反应器设计。最后对电催化生产H2O2的其他辅助技术进行了总结，并提出了挑战和前景。在此，我们相信本文的综述可以为今后电催化剂的发展和应用提供良好的基础。

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引用次数: 0

Model-predictive-control-based hierarchical energy management strategy for fuel cell hybrid electric vehicles considering traffic information 考虑交通信息的燃料电池混合动力汽车分层能量管理策略

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.2026.239387

Jun Liu, Zhendong Sun, Zhanfeng Zhu, Zonghai Chen, Yujie Wang

The variability of driving conditions and the complexity of traffic environment have brought great challenges to the energy management of fuel cell hybrid vehicles. Under the background of the rapid development of Internet of vehicles and intelligent transportation technology, a predictive hierarchical energy management framework for proton exchange membrane fuel cell/lithium-ion battery hybrid vehicles integrated with traffic perception speed prediction is proposed. Using traffic flow simulation and vehicle-to-everything (V2X) data flow, a short-term speed prediction model based on spatio-temporal graph neural network (STGNN) is established. By fusing historical vehicle data and real-time traffic information, the prediction accuracy is significantly improved. Based on the above speed prediction ability, a hierarchical model predictive control energy management strategy considering health is designed. The upper layer completes the planning of battery state of charge reference trajectory by using the long horizon vehicle speed preview information, and the lower layer realizes model predictive control, and carries out real-time multi-objective energy optimization for hydrogen consumption, component life and reference state of charge (SOC) tracking. The simulation results indicate that, in comparison to benchmark energy management strategies, the framework has significant advantages in extending the life of energy system and reducing operating costs.

行驶条件的多变性和交通环境的复杂性给燃料电池混合动力汽车的能量管理带来了巨大的挑战。在车联网和智能交通技术快速发展的背景下，提出了一种融合交通感知速度预测的质子交换膜燃料电池/锂离子电池混合动力汽车预测分层能量管理框架。利用交通流仿真和V2X数据流，建立了基于时空图神经网络（STGNN）的短期速度预测模型。通过融合历史车辆数据和实时交通信息，显著提高了预测精度。基于上述速度预测能力，设计了考虑健康的分层模型预测控制能量管理策略。上层利用长视距车速预览信息完成电池充电状态参考轨迹规划，下层实现模型预测控制，对耗氢量、部件寿命和参考充电状态（SOC）跟踪进行实时多目标能量优化。仿真结果表明，与基准能源管理策略相比，该框架在延长能源系统寿命和降低运行成本方面具有显著优势。

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引用次数: 0

Deep eutectic electrolytes for fast charging and wide temperature lithium metal batteries 用于快速充电和宽温度锂金属电池的深共晶电解质

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.2025.238884

Napat Lertthanaphol , Myat T. San , Md Anwar Hossain , Sarttrawut Tulaphol , Thana Maihom , Ming Wang , Jacek B. Jasinski , Jaroslaw Syzdek , Yang-Tse Cheng , Vance Jaeger , Noppadon Sathitsuksanoh

Lithium metal batteries offer high energy density. However, it requires electrolytes that remain stable under fast-charging and wide temperature fluctuation. Here, we develop a sulfonyl-based deep eutectic electrolyte (DEE) that is nonflammable, thermally stable, and highly conductive (4.1 mS cm⁻¹ at 30 °C). The tailored solvation structure of this DEE reduced Li⁺–anion binding and lowered desolvation barriers, as confirmed by spectroscopy, molecular dynamics, and density functional theory. The DEE formed a robust LiF/SO_x-rich solid electrolyte interphase that enabled long-term cycling. The Li/LFP cells delivered 92 % capacity retention after 1200 cycles at 2C and 30 °C. Moreover, Li/LMFP cells retained 75 % after 500 cycles at 2C and 30 °C. The electrolyte maintained stability under fast charging and repeated thermal transitions between 4 and 70 °C, highlighting its adaptability to demanding operating conditions. These findings establish sulfonyle-based DEEs as a design platform for safe, high-rate lithium metal batteries in grid storage and electric vehicles.

锂金属电池提供高能量密度。然而，它需要在快速充电和宽温度波动下保持稳定的电解质。在这里，我们开发了一种基于磺酰基的深共晶电解质（DEE），它是不易燃的，热稳定的，高导电性（4.1 mS cm−1,30°C）。光谱、分子动力学和密度泛函理论证实，该DEE的定制化溶剂化结构降低了Li+ -阴离子结合，降低了脱溶势垒。DEE形成了一个强大的富含liff / sox的固体电解质界面，可以实现长期循环。在2C和30°C下循环1200次后，Li/LFP电池的容量保持率为92%。此外，在2C和30°C下循环500次后，Li/LMFP细胞保留了75%。该电解质在快速充电和4 ~ 70°C的反复热转变下保持稳定，突出了其对苛刻操作条件的适应性。这些发现将基于磺酰的锂金属电池作为电网存储和电动汽车中安全、高倍率锂金属电池的设计平台。

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引用次数: 0

Nano-scale flexible carbon nanotube framework for enhanced reversibility in cathode-free aqueous manganese-based batteries 用于增强无阴极锰基水电池可逆性的纳米级柔性碳纳米管框架

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.2026.239361

Liujuan Yang , Yixin Li , Qi Zhang , Yougen Tang , Haiyang Wang

Aqueous manganese-based batteries with deposition-dissolution mechanism offer advantages including abundant material sources, low cost and intrinsic safety. However, the continuous accumulation of inactive Mn species during cycling suppresses the reversibility of the Mn²⁺/MnO₂ reaction, and the resulting ion de-intercalation reactions reduce the energy density, hindering the practical application of manganese-based batteries. Herein, we reveals that inactive Mn species primarily arises from the fracture and detachment of the MnO₂ deposition layer from the carbon fiber surface during extended cycling. We constructed a flexible carbon nanotube (CNT) framework on the cathode substrate which effectively prevents the fracture of the deposition layer caused by the volume expansion during the liquid-solid phase transition of the Mn²⁺/MnO₂ reaction, thus preventing the formation of inactive Mn species at the source. Compared with the conventional Cu-MnO₂ cells with the pristine carbon felt substrate which exhibit a Coulombic efficiency below 95 %, the cells assembled with the CNT framework substrate achieve 98 % Coulombic efficiency and increased energy efficiency from 75 % to 80 %. This simple and effective optimization strategy may further promote the application of high-energy manganese-based batteries in large-scale energy storage.

采用沉积-溶解机理的锰基水电池具有材料来源丰富、成本低、本质安全等优点。然而，循环过程中非活性锰种的不断积累抑制了Mn2+/MnO2反应的可逆性，导致离子脱插反应降低了能量密度，阻碍了锰基电池的实际应用。研究表明，在长时间循环过程中，非活性Mn主要来源于碳纤维表面MnO2沉积层的断裂和脱离。我们在阴极衬底上构建了柔性碳纳米管（CNT）框架，有效防止了Mn2+/MnO2反应液固相转变过程中体积膨胀导致的沉积层断裂，从而从源头上阻止了活性Mn物质的形成。与使用原始碳毡衬底的传统Cu-MnO2电池的库仑效率低于95%相比，使用碳纳米管框架衬底组装的电池的库仑效率达到98%，能量效率从75%提高到80%。这种简单有效的优化策略可能进一步推动高能锰基电池在大规模储能中的应用。

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引用次数: 0

Dual pentagonal defects in metal-free carbon enable synergistic catalysis for sodium–sulfur batteries 无金属碳的双五角形缺陷实现了钠硫电池的协同催化

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.2026.239376

Lifeng Wang , Xiangyu Luo , Xuran Cao , Shiqin Wang , Liang Wu , Yaxin Chen , Jiangmin Jiang , Xiangkai Kong , Zheng Xing , Naiqing Ren , Zhicheng Ju

Metal-free carbon-based materials have been recognized as prospective catalysts for energy conversion and storage, offering an economical and environmentally friendly strategy. However, the precise nature of pentagonal defects in carbon-based catalysts for sodium−sulfur (Na−S) batteries has been rarely reported to date. We employ density functional theory simulations to comprehensively investigate the role of different types of pentagon defects in suppressing polysulfide shuttle and promoting their conversion in Na−S batteries. We observe that introducing pentagon defects into carbon materials disrupts the integrity of the π-conjugation, leading to localized electron redistribution. Benefiting from the synergistic effect of armchair and zigzag pentagon defects, the carbon catalysts containing both types of defects exhibit stronger adsorption energies toward Na₂S_n species (−1.37 ∼ −2.31 eV), thereby effectively suppressing the polysulfide shuttle. We also confirmed a significant linear relationship between the power of charge changes (Q) and the adsorption energy: E = 0.73 + 4.76 Q^4.8 for short-chain Na₂S_n (n = 2–4) species. The calculated Gibbs free energy of each elementary sulfur reduction reaction indicates a remarkable decrease in the free energy barrier from 0.90 eV on pristine carbon to 0.75 eV on carbon catalysts with synergistic armchair and zigzag pentagon defects, highlighting their enhanced catalytic activity. This work not only clarifies the nature of intrinsic defects in carbon materials for electrochemical Na−S batteries but also provides the theoretical foundation for the rational preparation of advanced carbon electrocatalysts.

无金属碳基材料是一种经济环保的能源转化和储存催化剂，具有广阔的应用前景。然而，钠-硫（Na - S）电池碳基催化剂中五边形缺陷的确切性质迄今为止很少有报道。本文采用密度泛函理论模拟全面研究了不同类型的五边形缺陷在Na−S电池中抑制多硫化物穿梭和促进其转化的作用。我们观察到，在碳材料中引入五边形缺陷会破坏π共轭的完整性，导致局域电子重分布。得益于扶手型缺陷和之字形五边形缺陷的协同作用，含这两种缺陷的碳催化剂对Na2Sn的吸附能更强（- 1.37 ~ - 2.31 eV），从而有效抑制了多硫化物的穿梭。我们还证实了电荷变化功率(Q)与吸附能之间存在显著的线性关系：短链Na2Sn （n = 2-4）的E = 0.73 + 4.76 Q4.8。计算的各元素硫还原反应的吉布斯自由能表明，具有协同扶手椅缺陷和之字形五边形缺陷的碳催化剂的自由能垒从原始碳的0.90 eV显著降低到0.75 eV，表明其催化活性增强。这项工作不仅阐明了电化学Na−S电池用碳材料固有缺陷的性质，也为合理制备先进的碳电催化剂提供了理论基础。

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引用次数: 0

Ni ion doping effects on Sb2S3 and SnS for anode materials of sodium ion batteries 钠离子电池负极材料中镍离子掺杂对Sb2S3和SnS的影响

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-01-19 DOI: 10.1016/j.jpowsour.2026.239363

Jingya Wang , Mao Zhang , Siyeon Joo , Shinyoung Kim , Minseok Kim , Dayoung Yoo , Dongyun Lee

Sodium-ion batteries (SIBs) have attracted growing attention as cost-effective and resource-abundant alternatives to lithium-ion batteries (LIBs). Among potential anode candidates, sulfide-based materials such as Sb₂S₃ and SnS offer high theoretical capacities but suffer from low Initial coulombic efficiency (ICE) and rapid capacity fading during cycling. In this work, we systematically investigate the effect of nickel (Ni) doping on Sb₂S₃ and SnS anodes. The materials are synthesized by a hydrothermal method, and their structural, morphological, and electrochemical properties are characterized using X-ray diffraction (XRD), Scanning electron microscopy (SEM), and galvanostatic cycling tests. Ni doping induces notable changes in the crystal structure and morphology of both Sb₂S₃ and SnS, leading to improved electrochemical performance. Specifically, Sb₂S₃ with 5 at% Ni doping exhibits a stable capacity of ∼600 mAh·g⁻¹ after 50 cycles at 0.2 A g⁻¹, whereas the undoped sample shows ∼30 % capacity loss (∼400 mAh·g⁻¹). In SnS, the optimal doping concentration is 7 at%, delivering 322 mAh·g⁻¹ after 50 cycles at 0.2 A g⁻¹, while higher doping contents result in performance degradation. These results demonstrate that appropriate Ni doping enhances the cycling stability and alleviates the limitation of low ICE in sulfide-based anode materials for SIBs.

钠离子电池（SIBs）作为锂离子电池（lib）的替代品，其成本效益高，资源丰富，越来越受到人们的关注。在潜在的阳极候选材料中，硫化物基材料（如Sb2S3和SnS）具有很高的理论容量，但在循环过程中存在初始库仑效率（ICE）低和容量快速衰减的问题。在这项工作中，我们系统地研究了镍（Ni）掺杂对Sb2S3和SnS阳极的影响。采用水热法合成了该材料，并利用x射线衍射（XRD）、扫描电镜（SEM）和恒流循环测试对其结构、形态和电化学性能进行了表征。Ni的掺杂使Sb2S3和SnS的晶体结构和形貌发生了显著的变化，从而提高了电化学性能。具体来说，5 at% Ni掺杂的Sb2S3在0.2 a g−1下循环50次后显示出稳定的~ 600 mAh·g−1容量，而未掺杂的样品显示出~ 30%的容量损失（~ 400 mAh·g−1）。在SnS中，最佳掺杂浓度为7 at%，在0.2 A g−1下循环50次后输出322 mAh·g−1，而较高的掺杂含量会导致性能下降。这些结果表明，适当的Ni掺杂提高了sib硫化物基阳极材料的循环稳定性，缓解了低ICE的限制。

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引用次数: 0

Dynamic polarization behavior in a commercial-scale pouch-type lithium-ion battery examined by a three-dimensional electrochemical-thermal modeling framework 用三维电化学-热建模框架研究商业规模袋式锂离子电池的动态极化行为

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-01-19 DOI: 10.1016/j.jpowsour.2026.239358

Daehoon Kim , Jongsup Hong

Experimentally analyzing the polarization behavior of lithium-ion battery cells under dynamic conditions is challenging due to numerous constraints, including significant time and cost requirements. To overcome these limitations, this study conducted a numerical analysis of polarization behavior under such conditions, which are difficult to examine with precision through experiments alone. A multiphysics model incorporating electrochemical–thermal coupling was developed to enable detailed analysis of polarization phenomena arising from individual polarization sources. The parameters for this model were obtained through property extraction experiments. The computational model was used to simulate Hybrid Pulse Power Characterization (HPPC) tests under a range of operating conditions, including different C-rates, states of charge (SoC), and ambient and cell temperatures. This approach allowed for separate evaluation of voltage drops and energy losses based on varying operational conditions. The analysis revealed that during discharge, voltage drop and energy loss are significantly influenced by concentration polarization within the solid-phase active material and activation polarization. In contrast, during charging, these effects are primarily governed by activation polarization alone. This difference arises because the active material in the negative electrode has a relatively large particle radius compared to its diffusion coefficient, making lithium deintercalation during discharge more energy-intensive. As operating temperature increases during discharge, improvements in temperature-dependent material properties enhance mass transport and electrochemical kinetics, resulting in reduced voltage drop and energy loss—especially during charging—and ultimately leading to a lower temperature rise in the battery cell. Conversely, during the charging process, higher cell temperatures increase heat generation due to greater reversible heat generation.

实验分析动态条件下锂离子电池的极化行为是具有挑战性的，因为有许多限制，包括大量的时间和成本要求。为了克服这些限制，本研究对这种条件下的极化行为进行了数值分析，这很难通过单独的实验进行精确的检验。建立了一个包含电化学-热耦合的多物理场模型，以便对单个极化源产生的极化现象进行详细分析。通过属性提取实验获得了该模型的参数。该计算模型用于模拟各种工作条件下的混合脉冲功率特性（HPPC）测试，包括不同的c -速率、荷电状态（SoC）、环境温度和电池温度。这种方法允许根据不同的操作条件单独评估电压降和能量损失。分析表明，放电过程中，固相活性材料内部的浓度极化和活化极化对电压降和能量损失有显著影响。相反，在充电过程中，这些效应主要由激活极化单独控制。这种差异的产生是因为负极中的活性物质与其扩散系数相比具有相对较大的颗粒半径，使得放电过程中的锂脱插更加耗能。随着放电过程中工作温度的升高，与温度相关的材料性能的改善增强了质量传递和电化学动力学，从而降低了电压降和能量损失（尤其是在充电过程中），最终降低了电池单元的温升。相反，在充电过程中，较高的电池温度会增加热量的产生，因为可逆热量的产生更大。

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引用次数: 0

Elastic carbon nanotube aerogels with unidirectional alignment as electrocatalyst support for high performance ultralow Pt-loaded fuel cell electrodes 单向定向弹性碳纳米管气凝胶作为高性能超低铂负载燃料电池电极的电催化剂载体

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-01-19 DOI: 10.1016/j.jpowsour.2026.239319

Shi-Hyun Seok , Minki Jun , Jae Won Lee , Yeongseop Lee , Kisung Lim , Sangwon Kim , Hae Jung Son , Hyunchul Ju , Jin Young Kim , Sook Young Moon

Carbon support structures based on elastic carbon nanotube (CNT) aerogels are designed as efficient ultralow Pt-loaded catalyst layers for proton exchange membrane fuel cells (PEMFCs). The CNT aerogels consist of elastic self-supporting frameworks with controlled linear packing density and alignment. Among different morphologies, the horizontally aligned structure exhibits 180 % higher tensile strength, 13.7 % greater porosity, and enhanced connectivity and crystallinity. This optimized configuration enables efficient electron and mass transport pathways, resulting in superior PEMFC performance at ultralow Pt loadings. A maximum power density of ∼0.5 W cm⁻² is achieved at 0.1 mg_Pt cm⁻² when the horizontally aligned CNT aerogel is employed as a cathode, significantly outperforming both conventional carbon black and randomly aligned CNT electrodes. The performance enhancement is attributed to improved electron transport and oxygen gain facilitated by the thin two-dimensional, densely aligned CNT bundles.

设计了基于弹性碳纳米管（CNT）气凝胶的碳支撑结构作为质子交换膜燃料电池（pemfc）的高效超低pt负载催化剂层。碳纳米管气凝胶由弹性自支撑框架组成，具有可控的线性填充密度和排列方式。在不同的形貌中，水平排列结构的抗拉强度提高了180%，孔隙率提高了13.7%，连通性和结晶度也有所提高。这种优化的结构可以实现高效的电子和质量传递途径，从而在超低Pt负载下获得卓越的PEMFC性能。当水平排列的碳纳米管气凝胶作为阴极时，在0.1 mgPt cm - 2下实现了约0.5 W cm - 2的最大功率密度，显著优于传统的炭黑和随机排列的碳纳米管电极。性能的增强是由于薄的二维、密集排列的碳纳米管束促进了电子传递和氧增益的改善。

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引用次数: 0

Tailoring three-dimensional hierarchical porosity in Wadsley–Roth Nb14W3O44: A dual-role ethylenediaminetetraacetic acid combustion strategy for ultra-stable and high-rate lithium storage 调整Wadsley-Roth Nb14W3O44的三维分层孔隙度：一种用于超稳定和高速率锂储存的双作用乙二胺四乙酸燃烧策略

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-01-19 DOI: 10.1016/j.jpowsour.2026.239342

Yuanyuan Li , Min Yang , Youqin Liu , Xinjian Wang , Lai Chen , Yi Wang , Shuang Qiu , Hubin Shi , Yong Yi , Lili Liu , Shiyong Sun , Yevgeny Aleksandrovich Golubev , Haifeng Liu , Chuanbei Liu , Jianwu Wen

The Wadsley–Roth phase Nb₁₄W₃O₄₄ emerges as a potential anode candidate for fast-charging lithium-ion batteries, featuring intrinsic crystalline tunnels that theoretically enable ultrafast ion transport. However, realizing this potential highlights a persistent challenge that conventional microstructures fail to reconcile the fundamental trade-off between rapid kinetics and durable interfacial stability. Herein, we address this limitation through an innovative dual-role ethylenediaminetetraacetic acid (EDTA) combustion strategy that directly constructs Nb₁₄W₃O₄₄ with precisely engineered multi-scale three-dimensional (3D) hierarchical porosity. By serving simultaneously as a chelating agent and a previously overlooked in situ pore-former, EDTA ensures molecular-scale precursor homogenization and gas-foamed architecture in a single process. This tailored architecture concurrently establishes continuous ion pathways and a robust framework, enabling exceptional rate capability (90 mAh g⁻¹ at 9 A g⁻¹) coupled with outstanding cycling stability (120 mAh g⁻¹ after 1000 cycles at 3 A g⁻¹ with merely 0.019% capacity decay per cycle). Systematic electrochemical diagnostics further reveal concurrent enhancement of Li⁺ diffusion kinetics and interfacial charge transfer. Collectively, this multi-scale microstructure engineering approach successfully reconciles the long-standing kinetics-stability dilemma in intercalation electrodes, thereby establishing a new design paradigm for durable fast-charging batteries.

Wadsley-Roth相Nb14W3O44作为快速充电锂离子电池的潜在阳极候选者，具有内在的晶体隧道，理论上可以实现超快离子传输。然而，实现这一潜力凸显了一个持续的挑战，即传统的微结构无法协调快速动力学和持久界面稳定性之间的基本权衡。在此，我们通过创新的双作用乙二胺四乙酸（EDTA）燃烧策略解决了这一限制，该策略直接构建了具有精确设计的多尺度三维（3D）分层孔隙度的Nb14W3O44。通过同时作为螯合剂和之前被忽视的原位成孔剂，EDTA可以确保在单个过程中实现分子级前驱体均质和气体泡沫结构。这种定制的架构同时建立了连续的离子通路和强大的框架，实现了卓越的速率能力（在9ag - 1下90 mAh g - 1）以及出色的循环稳定性（在3ag - 1下1000次循环后120 mAh g - 1，每次循环仅衰减0.019%）。系统的电化学诊断进一步揭示了Li+扩散动力学和界面电荷转移的同步增强。总的来说，这种多尺度微结构工程方法成功地解决了插入电极长期存在的动力学稳定性难题，从而为持久快速充电电池建立了一种新的设计范式。

{"title":"Tailoring three-dimensional hierarchical porosity in Wadsley–Roth Nb14W3O44: A dual-role ethylenediaminetetraacetic acid combustion strategy for ultra-stable and high-rate lithium storage","authors":"Yuanyuan Li , Min Yang , Youqin Liu , Xinjian Wang , Lai Chen , Yi Wang , Shuang Qiu , Hubin Shi , Yong Yi , Lili Liu , Shiyong Sun , Yevgeny Aleksandrovich Golubev , Haifeng Liu , Chuanbei Liu , Jianwu Wen","doi":"10.1016/j.jpowsour.2026.239342","DOIUrl":"10.1016/j.jpowsour.2026.239342","url":null,"abstract":"<div><div>The Wadsley–Roth phase Nb<sub>14</sub>W<sub>3</sub>O<sub>44</sub> emerges as a potential anode candidate for fast-charging lithium-ion batteries, featuring intrinsic crystalline tunnels that theoretically enable ultrafast ion transport. However, realizing this potential highlights a persistent challenge that conventional microstructures fail to reconcile the fundamental trade-off between rapid kinetics and durable interfacial stability. Herein, we address this limitation through an innovative dual-role ethylenediaminetetraacetic acid (EDTA) combustion strategy that directly constructs Nb<sub>14</sub>W<sub>3</sub>O<sub>44</sub> with precisely engineered multi-scale three-dimensional (3D) hierarchical porosity. By serving simultaneously as a chelating agent and a previously overlooked <em>in situ</em> pore-former, EDTA ensures molecular-scale precursor homogenization and gas-foamed architecture in a single process. This tailored architecture concurrently establishes continuous ion pathways and a robust framework, enabling exceptional rate capability (90 mAh g<sup>−1</sup> at 9 A g<sup>−1</sup>) coupled with outstanding cycling stability (120 mAh g<sup>−1</sup> after 1000 cycles at 3 A g<sup>−1</sup> with merely 0.019% capacity decay per cycle). Systematic electrochemical diagnostics further reveal concurrent enhancement of Li<sup>+</sup> diffusion kinetics and interfacial charge transfer. Collectively, this multi-scale microstructure engineering approach successfully reconciles the long-standing kinetics-stability dilemma in intercalation electrodes, thereby establishing a new design paradigm for durable fast-charging batteries.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"668 ","pages":"Article 239342"},"PeriodicalIF":7.9,"publicationDate":"2026-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146025293","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}

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