Journal of Power Sources最新文献_第2页

Mechanistic comparison of lithiation–delithiation in indium versus tin foil anodes for all-solid-state batteries 全固态电池用铟与锡箔阳极锂离子衰减机理比较

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-05-15 Epub Date: 2026-03-06 DOI: 10.1016/j.jpowsour.2026.239814

Yusuke Morino, Daisuke Ito

All-solid-state batteries employing inorganic solid electrolytes are expected to enable higher-rate operation, longer lifetime, and a wider operating-temperature window than conventional liquid-electrolyte lithium-ion batteries. To realize these advantages, high-capacity alloy anodes are attractive alternatives to graphite; however, the lithiation/delithiation mechanisms and their compatibility with inorganic solid electrolytes remain insufficiently understood. Here, we investigate mechanically compliant metallic alloy foil anodes of indium and tin, two adjacent elements in the periodic table (theoretical volumetric capacities >2000 mAh cm⁻³) paired with an argyrodite-type Li₆PS₅Cl solid electrolyte in half cells. Indium exhibits a coulombic efficiency of ∼99%, whereas tin exhibits a much lower coulombic efficiency. Electrochemical measurements combined with X-ray diffraction indicate that indium undergoes reversible crystalline phase transitions over a wide state-of-charge range, yielding distinct potential plateaus. In contrast, tin shows plateau behavior associated with crystalline phase transitions at early lithiation, followed by a gradual potential decrease accompanied by amorphization at higher lithiation levels. These findings clarify distinct reaction pathways of mechanically compliant alloy anodes in all-solid-state batteries, reveal a crystallographic origin of the markedly different reversibility between In and Sn, and provide guidance for selecting alloy/solid-electrolyte pairings toward high-rate and durable cells.

与传统的液体电解质锂离子电池相比，采用无机固体电解质的全固态电池有望实现更高的运行速率、更长的使用寿命和更宽的工作温度窗口。为了实现这些优势，高容量合金阳极是石墨的有吸引力的替代品；然而，锂化/去锂化机制及其与无机固体电解质的相容性仍未得到充分的了解。在这里，我们研究了机械柔性金属合金箔阳极的铟和锡，两个相邻元素的周期表（理论体积容量>；2000 mAh cm−3）与半电池中的银矾型Li6PS5Cl固体电解质配对。铟的库仑效率为99%，而锡的库仑效率要低得多。电化学测量结合x射线衍射表明，铟在很宽的电荷状态范围内经历可逆的晶体相变，产生明显的电位平台。相比之下，锡在早期的锂化过程中表现出与晶体相变相关的平台行为，随后在较高的锂化水平下，电位逐渐下降并伴有非晶化。这些发现阐明了全固态电池中机械柔性合金阳极的不同反应途径，揭示了in和Sn之间明显不同的可逆性的晶体学起源，并为选择高倍率和耐用电池的合金/固体电解质配对提供指导。

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引用次数: 0

Covalency-driven reduction of electrostatic barriers via high-electronegativity Sb/Bi in Li3MI6: First-principles prediction of iodide electrolytes 利用高电负性Sb/Bi在Li3MI6中共价驱动的静电屏障还原：碘化物电解质的第一性原理预测

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-05-15 Epub Date: 2026-03-06 DOI: 10.1016/j.jpowsour.2026.239805

Han Bao , Guofeng Xu , Junmin Ke , Zulfiqar Ali , Jianghao Zhao , Changwen Wang , Furong Liu

All-solid-state lithium-ion batteries (ASSLIBs) have emerged as a transformative energy storage technology, offering unparalleled advantages in safety, energy density, and cycle life compared to conventional liquid electrolyte-based systems. Ionic conductivity in halide solid electrolytes is traditionally tuned by manipulating ionic radii, often overlooking electronic effects. Here, we reveal a covalency-driven mechanism that lowers electrostatic barriers. Using first-principles calculations on Li₃SbI₆ and Li₃BiI₆, we demonstrate that high-electronegativity cations (Sb/Bi) induce strong covalent character in the framework. This covalency effectively screens the electrostatic attraction between the anion framework and Li⁺, thereby reducing the migration barrier for lithium ions and significantly enhancing ionic conductivity. Crucially, by comparing Li₃BiI₆ with the isostructural Li₃LaI₆, we successfully decoupled electronic effects from steric hindrance, confirming covalency as the decisive factor for superionic conduction. To substantiate these theoretical predictions, we synthesized the Li₃BiI₆ electrolyte, which exhibited a remarkable room-temperature conductivity of 13.74 mS cm⁻¹. This work establishes bond covalency as a critical descriptor for rational electrolyte design, shifting the focus from structural sizing to electronic modulation.

全固态锂离子电池（asslib）已经成为一种变革性的储能技术，与传统的液体电解质系统相比，它在安全性、能量密度和循环寿命方面具有无与伦比的优势。卤化物固体电解质中的离子电导率传统上是通过操纵离子半径来调节的，通常忽略了电子效应。在这里，我们揭示了共价驱动的机制，降低静电屏障。通过对Li3SbI6和Li3BiI6的第一性原理计算，我们证明了高电负性阳离子（Sb/Bi）在框架中诱导了强共价特征。这种共价有效地屏蔽了阴离子框架与Li+之间的静电吸引力，从而降低了锂离子的迁移屏障，显著提高了离子的电导率。关键是，通过比较Li3BiI6和同构Li3LaI6，我们成功地将电子效应与位阻解耦，证实共价是超电子传导的决定性因素。为了证实这些理论预测，我们合成了Li3BiI6电解质，其室温电导率为13.74 mS cm−1。这项工作建立了键共价作为合理电解质设计的关键描述符，将重点从结构尺寸转移到电子调制。

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引用次数: 0

Rational process design of cost-benefit prelithiation additive Li5FeO4 enables high-performance lithium-ion batteries 合理设计成本-效益预锂化添加剂Li5FeO4工艺，实现高性能锂离子电池

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-05-15 Epub Date: 2026-03-06 DOI: 10.1016/j.jpowsour.2026.239774

Weiwei Wang , Xueying Jia , Yuhao Zhang , Bing Qin , Ying Wang , Chenyu Yang , Qinghua Liu

Li₅FeO₄ (LFO), an ideal cathode prelithiation additive for lithium-ion batteries, has attracted significant interest because of its extremely high capacity, suitable voltage window, and environmental friendliness. However, the solid-phase synthesis process of LFO is not clear and suffers from the exorbitant cost of Li₂O, making finding an alternative lithium source for improving cost-effectiveness in industrial production crucial. In this study, LFO materials were synthesized via a solid-phase sintering method involving two types of lithium sources. Utilizing in-situ X-ray diffraction and X-ray absorption fine structure spectroscopy, the evolution mechanism of solid-phase synthesis was elucidated. In particular, a low-temperature plateau was determined for the synthesis process employing LiOH as the lithium source. Compared with Li₂O-derived O-LFO, the as-obtained prelithiation additive H-LFO achieved an ∼69.7% cost reduction with satisfactory initial charge capacity, energy density and cycling stability in industrial-scale applications. This work provides a practical solution for promoting prelithiation technology and reducing the preparation cost of prelithiation additives.

Li5FeO4 （LFO）是一种理想的锂离子电池阴极预锂化添加剂，由于其极高的容量、合适的电压窗和环境友好性而引起了人们的极大兴趣。然而，LFO的固相合成工艺尚不明确，且Li2O成本过高，因此寻找替代锂源以提高工业生产的成本效益至关重要。本研究采用固相烧结法合成LFO材料，涉及两种锂源。利用原位x射线衍射和x射线吸收精细结构光谱，对固相合成的演化机理进行了分析。特别地，确定了以LiOH为锂源的合成过程的低温平台。与li20衍生的O-LFO相比，获得的预锂化添加剂H-LFO在工业规模应用中具有令人满意的初始充电容量、能量密度和循环稳定性，成本降低了~ 69.7%。本研究为推广预锂化技术，降低预锂化添加剂的制备成本提供了切实可行的解决方案。

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引用次数: 0

Research on energy saving of electric vehicle motor parameters adaptive control based on artificial intelligence noise detection algorithm in high-frequency spectrum 基于高频频谱人工智能噪声检测算法的电动汽车电机参数自适应节能控制研究

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-05-15 Epub Date: 2026-03-06 DOI: 10.1016/j.jpowsour.2026.239727

Chang-Hung Hsu

This study proposes a multi-objective control approach using the LSTM (Long Short-Term Memory) method to measure and analyze motor noise in complex multi-frequency domains. The integrated energy function and the limiting energy output function are composited with fuzzy logic + FOPID (Fractional-Order Proportional-Integral-Derivative) controller for energy saving and drive control of the motor. Experiments are conducted with a motor operating noise, including normal and abnormal noise frequencies between 40 Hz and 6 kHz. Abnormal noise and signals are extracted using LSTM and RNN (Recurrent Neural Network). A Butterworth bandpass filter (BBF) is used to reduce noise and separate components of specific expected and excitation frequencies. It shows main contribution to the suppression of motor current oscillations and electromagnetic noise and vibration. The LSTM + BBF model integrated with energy function is used to composite a Fuzzy controller and adjustable parameter FOPID controller. The experiment used a 600-Ω load condition to verify the integrity of the inferential control architecture for nonlinear motor operation systems. Finally, this research is developed that a controller and LSTM + BBF noise spectrum measurement system is adaptable to various motor types and loadings. After comparing the performance of a traditional PID controller and a fuzzy + FOPID controller using the LSTM algorithm, the overall energy consumption of the motor with power meter is validated to reduce energy at least 17%.

本研究提出一种多目标控制方法，利用LSTM（长短期记忆）方法在复杂多频域测量和分析电机噪声。利用模糊逻辑+分数阶比例积分导数（FOPID）控制器，将积分能量函数和极限能量输出函数组合在一起，实现了电机的节能和驱动控制。实验采用电机运行噪声，包括正常噪声和异常噪声频率在40 Hz到6 kHz之间。利用LSTM和RNN（递归神经网络）提取异常噪声和异常信号。巴特沃斯带通滤波器（BBF）用于降低噪声和分离特定期望频率和激励频率的分量。它对抑制电机电流振荡和电磁噪声振动有重要贡献。采用结合能量函数的LSTM + BBF模型将模糊控制器与可调参数FOPID控制器组合在一起。实验使用600-Ω负载条件来验证非线性电机运行系统推理控制体系结构的完整性。最后，本研究提出了一种适用于各种电机类型和负载的控制器和LSTM + BBF噪声频谱测量系统。通过比较传统PID控制器和采用LSTM算法的模糊+ FOPID控制器的性能，验证了带功率计的电机总体能耗至少降低17%。

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引用次数: 0

Sustainable flexible self-powered energy source for wearable electronics: Integrated performance-enhanced triboelectric nanogenerator-supercapacitor based on single biomass carbon 可穿戴电子产品的可持续柔性自供电能源：基于单一生物质碳的集成性能增强摩擦电纳米发电机-超级电容器

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-05-15 Epub Date: 2026-03-06 DOI: 10.1016/j.jpowsour.2026.239782

Guanjun Zhu , Shengkui Yuan , Honglai Yan , Hongliang Du , Fang Ren , Penggang Ren , Yong Jiao , Qinghua Sun

Flexible self-powered energy module with “energy harvesting-storage-supply” function integrated by triboelectric nanogenerator (TENG) and flexible solid-state supercapacitor (FSSC) is considered a highly promising approach for powering wearable electronics. However, their effective integration into a high-performance, reliable, and wearable module remains challenging, often constrained by the complexity of coordinating disparate materials and fabrication processes for each unit. Herein, a “multiple-benefits-in-one” strategy is proposed, which involves utilizing a single biomass carbon material (puffed rice-derived activated carbon, PRAC) as universal functional material for TENG and FSSC. This innovative approach achieves performance enhancement for both units while reducing system complexity and cost, enabling efficient system integration. The unique porous structure of PRAC endows FSSC constructed by patterned electrodes with high area capacitance, excellent cycle reliability and stable capacitance retention unaffected by bending states. The PRAC-doped TENG achieves efficient energy harvesting and conversion due to optimized charge storage capacity. An all-in-one wearable device consisting of TENG, FSSC and LEDs is constructed to simultaneously generate and store power as well as to realize self-driven lighting, demonstrating great convenience and practicability for application in integrated electronics. This work provides innovative material strategies and feasible integration technology pathways for developing high-performance, low-cost, environmentally friendly flexible self-powered systems.

由摩擦纳米发电机（TENG）和柔性固态超级电容器（FSSC）集成的具有“能量收集-存储-供应”功能的柔性自供电能源模块被认为是一种非常有前途的可穿戴电子设备供电方法。然而，将它们有效地集成到高性能、可靠和可穿戴的模块中仍然具有挑战性，通常受到每个单元协调不同材料和制造工艺的复杂性的限制。本文提出了一种“多效益合一”的策略，其中包括利用单一生物质碳材料（膨化稻源活性炭，PRAC）作为TENG和FSSC的通用功能材料。这种创新的方法在降低系统复杂性和成本的同时实现了两个单元的性能增强，实现了有效的系统集成。PRAC独特的多孔结构赋予了由图案电极构建的FSSC具有高面积电容、优异的循环可靠性和不受弯曲状态影响的稳定电容保持。由于优化了电荷存储容量，掺prac的TENG实现了高效的能量收集和转换。构建了一种由TENG、FSSC和led组成的可穿戴设备，可以同时产生和储存电能，实现自驱动照明，在集成电子领域的应用具有极大的便利性和实用性。这项工作为开发高性能、低成本、环保的柔性自供电系统提供了创新的材料策略和可行的集成技术途径。

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引用次数: 0

A study of a commercially available anode-supported 2R-Cell™ SOFC via synchrotron radiation XAFS and electrochemical characterization 通过同步辐射XAFS和电化学表征对市售阳极支持的2R-Cell™SOFC进行了研究

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-05-15 Epub Date: 2026-03-04 DOI: 10.1016/j.jpowsour.2026.239755

Gabriel A. Cabrera-Pasca , Beethoven Narváez-Romo , Erick L. Ribeiro , Latif U. Khan , Matheus B.C. de Souza , Pedro H. Britto-Costa , Raphaël Ihringer , Santiago J.A. Figueroa , Tiago M.T. Martins , Zahid U. Khan , Izabel F. Machado , Julio R. Meneghini , Nigel P. Brandon , Thiago Lopes

Solid oxide fuel cells (SOFCs) represent a promising pathway toward efficient and low-emission energy conversion technologies. This study investigates the integrated electrochemical and synchrotron-based characterization of a commercially manufactured anode-supported SOFC evaluated at laboratory (button-cell) scale (2R-Cell™), developed by Fiaxell SOFC Technologies. Microstructural analysis was conducted using scanning electron microscopy (SEM) combined with energy-dispersive X-ray spectroscopy (EDS). This assessment enabled direct observation of the engineered anode composed of Ni–8YSZ microspheres forming low-tortuosity channels, as well as a dense 8YSZ electrolyte stabilized by a GDC buffer layer. Synchrotron-based X-ray fluorescence (XRF) mapping confirmed the preservation of multilayer chemical integrity after operation under reducing conditions. X-ray absorption spectroscopy (XAS), including XANES and EXAFS, was employed at the Ni, Zr, Fe, and Sr K-edges to monitor redox behavior and structural evolution. The Ni spectra revealed partial and spatially heterogeneous reductions NiO to Ni⁰ at 800 °C, while the Zr and Fe spectra showed negligible changes, indicating stability of the electrolyte and cathode. Electrochemical impedance spectroscopy (EIS) under H₂/N₂ operation further validated the low polarization resistance and robust performance of the cell architecture. These results demonstrate the electrochemical resilience and microstructural integrity of the 2R-Cell™, highlighting its suitability for advanced hydrogen-fueled SOFC applications.

固体氧化物燃料电池（SOFCs）是一种很有前途的高效低排放能源转换技术。本研究研究了Fiaxell SOFC技术公司开发的商业化阳极负载SOFC在实验室（纽扣电池）规模（2R-Cell™）上进行的综合电化学和基于同步加速器的表征。采用扫描电子显微镜（SEM）结合能量色散x射线能谱（EDS）对样品进行了显微结构分析。这一评估可以直接观察到由Ni-8YSZ微球组成的工程阳极形成低扭曲通道，以及由GDC缓冲层稳定的致密8YSZ电解质。基于同步加速器的x射线荧光（XRF）测绘证实了在还原条件下操作后多层化学完整性的保存。x射线吸收光谱（XAS），包括XANES和EXAFS，在Ni， Zr， Fe和Sr的k边监测氧化还原行为和结构演变。在800°C时，Ni光谱显示NiO到Ni0的部分和空间非均匀还原，而Zr和Fe光谱的变化可以忽略不计，表明电解质和阴极的稳定性。H2/N2操作下的电化学阻抗谱（EIS）进一步验证了电池结构的低极化电阻和稳健性能。这些结果证明了2R-Cell™的电化学弹性和微观结构完整性，突出了其适用于先进的氢燃料SOFC应用。

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引用次数: 0

Dynamic heterojunctions enabled by liquid metal for high-performance silicon anodes 液态金属实现高性能硅阳极的动态异质结

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-05-15 Epub Date: 2026-03-04 DOI: 10.1016/j.jpowsour.2026.239799

Qingqing Liu , Yufeng Lin , Xiao Wei , Zimo Song , Changhaoyue Xu , Yanxi Wan , Wenlong Cai , Feng Chen

The exertion of the full capacity of non-conducting silicon anodes inevitably leads to severe volume expansion, which critically limits their practical viability. In our work, a simple liquid metal (LM) coating strategy is introduced to engineer dynamic heterojunction interfaces on Si/C particle surfaces. Leveraging the reversible solid–liquid phase dynamic transition behavior of LM during (de)lithiation, the interface provides solid-phase mechanical buffering during lithiation and liquid-phase flowability upon delithiation, effectively repairing the structural voids and maintaining interfacial continuity under large volume fluctuations. Theoretical calculations reveal that the strong Li–Ga interaction and superior Ga conductivity contribute to improved electronic and ionic kinetics at the interface. As a result, the LM–Si/C anode exhibits a previously unreported cyclic capacity recovery behavior, attributed to phase-induced interfacial remodeling. The electrode delivers a high capacity of 680 mAh g⁻¹ at 2 A g⁻¹, excellent cyclability (500 cycles with 61% retention), and a substantial reduction in electrode thickness expansion from 64.1% to 18.5%. Full-cell tests confirm the practicality of this design. This work establishes a mechanistically guided, phase-adaptive interfacial strategy for advancing silicon-based lithium-ion batteries.

非导电硅阳极的全部容量的发挥不可避免地导致严重的体积膨胀，这严重限制了它们的实际可行性。在我们的工作中，引入了一种简单的液态金属（LM）涂层策略来设计Si/C颗粒表面的动态异质结界面。利用（去）锂化过程中LM的可逆固液动态转变行为，该界面在锂化过程中提供固相力学缓冲，在去锂化过程中提供液相流动性，有效修复结构空隙，在大体积波动下保持界面连续性。理论计算表明，强的Li-Ga相互作用和优异的Ga导电性有助于改善界面上的电子和离子动力学。结果，LM-Si /C阳极表现出以前未报道的循环容量恢复行为，归因于相诱导的界面重塑。该电极在2 a g−1下提供680 mAh g−1的高容量，出色的可循环性（500次循环，保留61%），并且电极厚度膨胀从64.1%大幅降低到18.5%。全电池测试证实了该设计的实用性。这项工作为推进硅基锂离子电池建立了一种机械引导、相位自适应的界面策略。

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引用次数: 0

Copper regulated facet dependent surface behavior promoting single crystal growth of sodium layered cathodes 铜调节面依赖的表面行为促进钠层阴极的单晶生长

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-05-15 Epub Date: 2026-03-05 DOI: 10.1016/j.jpowsour.2026.239795

Aoci Yang , Meng Li , Yang Gu , Zongyu Guan , Mingxiang Deng , Siteng Zhou , Kuan Wang , Litao Yan , Jiangtao Hu , Biwei Xiao

Layered oxide cathodes for sodium-ion batteries are susceptible to structural degradation during cycling, which severely limits their long-term stability. Although single-crystal engineering has been demonstrated to significantly improve structural stability, the underlying growth mechanism remains unclear. In this work, NaNi_0.4Fe_0.2Mn_0.4O₂ was selected as a model system to systematically investigate the role of Cu doping during the growth process. In-situ high-temperature XRD and SEM analyses demonstrate that Cu doping influences crystal-growth kinetics and facet-dependent growth modes, thereby promoting a morphological transition from polycrystalline aggregates to single-crystal-like particle structures. Electrochemical and thermal analyses under Na-deficient conditions demonstrated that the Cu-Ni solid solution formed during sintering, together with the relatively strong Cu-O bonds, serves as structural pinning centers during cycling, mitigating interlayer slab gliding and irreversible structural changes, thereby enhancing both cycling stability and thermal stability. From the perspectives of facet evolution and local structural stabilization, this work provides mechanistic insight into how Cu doping regulates single-crystal-like growth and enhances structural stability, offering new strategies for facet engineering and the rational design of sodium-ion battery cathodes.

钠离子电池层状氧化物阴极在循环过程中容易发生结构退化，严重限制了其长期稳定性。尽管单晶工程已被证明可以显著提高结构稳定性，但其潜在的生长机制仍不清楚。本文选择NaNi0.4Fe0.2Mn0.4O2作为模型体系，系统研究Cu掺杂在生长过程中的作用。原位高温XRD和SEM分析表明，Cu掺杂影响了晶体生长动力学和面依赖生长模式，从而促进了多晶团聚体向单晶样颗粒结构的形态转变。缺乏na条件下的电化学和热分析表明，烧结过程中形成的Cu-Ni固溶体和相对强的Cu-O键在循环过程中起到结构钉住中心的作用，减轻了层间板坯的滑动和不可逆的结构变化，从而提高了循环稳定性和热稳定性。从晶面演化和局部结构稳定的角度，本研究提供了Cu掺杂调控单晶生长和增强结构稳定性的机制，为晶面工程和钠离子电池阴极的合理设计提供了新的策略。

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引用次数: 0

Enhancing lithium-ion battery analysis: A machine learning approach to investigate innovative silicon thin film anode parameters and discharge capacity 增强锂离子电池分析：研究创新硅薄膜阳极参数和放电容量的机器学习方法

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-05-15 Epub Date: 2026-03-07 DOI: 10.1016/j.jpowsour.2026.239808

Elif Muslu Yilmaz , Aysegul Uygun Oksuz , Satoshi Hamaguchi , Elif Ceren Gok Yildirim , Murat Onur Yildirim , Kazumasa Ikuse , Pierre Vinchon , Nicolas Mauchamp , Esin Eren

Silicon (Si) thin film anodes offer very high theoretical capacity but also undergo severe volume expansion during lithiation, which causes fracture, loss of electrical contact, and rapid capacity fade in lithium-ion batteries. This study develops a machine learning (ML) framework that predicts discharge capacity and derives processing and operating guidelines for Si thin film anodes. A curated literature dataset with missing fabrication and cycling parameters is completed using ML-based imputation, for which Random Forest gives the highest accuracy. A Random Forest regressor then predicts discharge capacity with strong performance (validation R² = 0.86, mean absolute error = 174.1 mAh g⁻¹). Feature importance analysis identifies working pressure, cycle number, and C-rate as the most influential variables. The trained model also extrapolates learned degradation trends to later cycle numbers, producing hypothetical capacity fade projections that qualitatively align with the reported behaviour of Si thin film anodes, rather than representing statistically validated long-term predictions. Finally, a model-agnostic Accumulated Local Effects analysis quantifies how fabrication parameters and operating conditions shape both absolute capacity and its fading. The results show that ML not only predicts performance reliably but also supports the rational design of next-generation Si thin film anodes.

硅（Si）薄膜阳极提供非常高的理论容量，但在锂化过程中也会发生严重的体积膨胀，这会导致锂离子电池断裂、失去电接触和容量快速衰减。本研究开发了一种机器学习（ML）框架，用于预测放电容量，并推导出硅薄膜阳极的处理和操作指南。使用基于ml的imputation完成了缺少制造和循环参数的策划文献数据集，其中Random Forest给出了最高的准确性。然后随机森林回归器预测放电容量具有较强的性能（验证R2 = 0.86，平均绝对误差= 174.1 mAh g−1）。特征重要性分析确定工作压力、循环次数和c率是影响最大的变量。经过训练的模型还将学习到的退化趋势外推到以后的循环数，产生与硅薄膜阳极的报道行为定性一致的假设容量衰减预测，而不是代表经过统计验证的长期预测。最后，模型不可知的累积局部效应分析量化了制造参数和操作条件如何影响绝对容量及其衰落。结果表明，机器学习不仅可以可靠地预测性能，而且可以为下一代硅薄膜阳极的合理设计提供支持。

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引用次数: 0

A review of float charging in lithium-ion batteries: Degradation mechanisms, influencing factors, and optimization strategies 锂离子电池浮充研究进展：退化机理、影响因素及优化策略

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-05-15 Epub Date: 2026-03-07 DOI: 10.1016/j.jpowsour.2026.239788

Mohammed Saquib Khan , Sahithi Maddipatla , Michael Pecht

Lithium-ion batteries (LIBs) are increasingly being used in backup energy storage applications such as on-grid substations and solar systems, where maintaining a full state of charge is essential to ensure immediate availability and delivery of rated capacity. As a result, float charging, which involves supplying a low, continuous current to maintain the battery's charged potential and counteract self-discharge, is used to ensure batteries remain fully charged. However, prolonged float charging can lead to battery degradation caused by electrolyte decomposition, deposition of metallic lithium, and structural changes of the electrodes, compromising battery lifespan, performance, and safety. This review discusses the factors that influence float charging behavior, including the selection of float voltage, and ambient temperature. It also examines the associated degradation mechanisms and strategies to optimize float charging conditions for improved performance and longevity in stationary energy storage applications.

锂离子电池（lib）越来越多地用于备用能源存储应用，如并网变电站和太阳能系统，在这些应用中，保持完全充电状态对于确保立即可用和交付额定容量至关重要。因此，浮充技术被用于确保电池保持充满电状态。浮充技术提供一个低的、持续的电流来维持电池的充电电位并抵消自放电。然而，长时间的浮充会导致电解液分解、金属锂沉积和电极结构变化，从而降低电池的寿命、性能和安全性。本文讨论了影响浮充性能的因素，包括浮充电压的选择和环境温度。它还研究了相关的退化机制和策略，以优化浮式充电条件，以提高固定储能应用的性能和寿命。

引用次数: 0