Journal of Power Sources最新文献_第6页

Revealing position-dependent degradation mechanisms in LiFePO4/graphite batteries under high-temperature over-discharge condition 揭示高温过放电条件下LiFePO4/石墨电池的位置依赖性降解机制

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-01-10 DOI: 10.1016/j.jpowsour.2026.239278

Xinbai He , Jianan Hao , Qi Shi , Lai Chen , Jinyang Dong , Yibiao Guan , Yun Lu , Kang Yan , Yiya Wang , Ning Li , Qiongqiong Qi , Feng Wu , Yuefeng Su

Elucidating the degradation pathway of lithium-ion batteries is essential for improving its cycling and safety performance. However, in most cases, battery degradation pathway is evaluated by the overall battery behavior yet neglecting regional reaction heterogeneities within the battery. To address this, the present work investigates the position-dependent degradation phenomena by dividing the LiFePO₄/graphite pouch batteries into central region and outer edge under high-temperature over-discharge condition. The results indicate that the central region of battery experiences more severe degradation demonstrated by more drastic side reactions, thicker interphase layer accumulation and accelerated lithium inventory loss. The nonuniform chemical and structural degradations originate from local uneven reaction kinetics caused by coupled electrochemical and thermal gradients. These findings could help establish a direct correlation between spatial degradation heterogeneity and integrated battery performance fading. It also offers mechanistic understandings into how localized chemical environment difference influence macroscopic degradation of battery. The proposed regional degradation perspective could also provide insights for rational battery architecture design of high-capacity lithium-ion batteries.

阐明锂离子电池的降解途径对提高锂离子电池的循环性能和安全性能至关重要。然而，在大多数情况下，电池的降解途径是通过电池的整体行为来评估的，而忽略了电池内部区域反应的非均质性。为了解决这一问题，本研究通过将LiFePO4/石墨袋电池在高温过放电条件下分为中心区域和外边缘，研究了位置相关的降解现象。结果表明，电池中心区域的退化更为严重，副反应更为剧烈，相间层积累更厚，锂库存损失加速。不均匀的化学和结构降解源于电化学和热梯度耦合引起的局部不均匀反应动力学。这些发现有助于建立空间退化异质性与综合电池性能衰退之间的直接关联。这也为局部化学环境差异如何影响电池宏观降解提供了机理上的认识。提出的区域退化视角也可以为大容量锂离子电池的合理电池结构设计提供见解。

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引用次数: 0

Capillary reinforcement induced fabrication of cotton fiber array based hydro-electric generator for enhanced voltage output 毛细增强诱导的棉纤维阵列水轮发电机增强电压输出

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-01-09 DOI: 10.1016/j.jpowsour.2026.239252

Wen Huang, Tao Yuan, Yifan Ji, Hao Deng, Can Chen, Wei Xiong

Hydro-electricity generator (HEG) that uses ubiquitous environmental water molecules as an energy source could offer compelling advantages including minimal pollution and low cost. This work develops an effective, extendable, and stable HEG array by using a hierarchically structured carbon black/phytic acid@cotton fiber column (CB/PA@CFC) composite. The device achieves high energy conversion efficiency through rational structural optimization. Specifically, the CFC serves as microporous container for accommodating PA molecular and CB particles. The existing PA fully optimizes inner pore structure of the CFC via chemical grafting to improve capillary role and enhance its hydrophilicity, while it also provides abundant H⁺ through PA dissociation. Besides, the introducing CB particles effectively reinforces the conductivity of the CFC by establishing continuous conductive pathways for efficient electron conduction. Under 65 % relative humidity, a single HEG delivers an impressive open-circuit voltage (Voc) of 1.07 V and a short-circuit current (Isc) of 1.42 mA, reaching a power density of 0.94 mW/cm³. Such high performance stems primarily from capillary-driven ion diffusion gradients and enhanced electrical conduction (4.1 × 10⁻² S/m), which synergistically amplify the inner electric field. Furthermore, the integrated HEG module constructed by connecting 5 × 3 array in series, achieves a stable output voltage of 10.5 V, sufficient to power a small water electrolysis device for hydrogen production.

利用无处不在的环境水分子作为能源的水力发电机（HEG）具有污染少、成本低等显著优势。本工作通过使用分层结构的炭黑/植纤维柱（CB/PA@CFC）复合材料开发了一种有效、可扩展和稳定的HEG阵列。该装置通过合理的结构优化，实现了较高的能量转换效率。具体来说，CFC作为容纳PA分子和CB颗粒的微孔容器。现有的PA通过化学接枝充分优化了CFC的内部孔隙结构，改善了毛细管作用，增强了其亲水性，同时还通过PA解离提供了丰富的H+。此外，CB颗粒的引入通过建立连续的导电途径有效地增强了CFC的导电性，实现了高效的电子传导。在65%的相对湿度下，单个HEG提供了令人印象深刻的1.07 V开路电压（Voc）和1.42 mA短路电流（Isc），达到0.94 mW/cm3的功率密度。这种高性能主要源于毛细管驱动的离子扩散梯度和增强的电导率（4.1 × 10−2 S/m），它们协同放大了内部电场。此外，通过串联5 × 3阵列构建的集成HEG模块，可获得10.5 V的稳定输出电压，足以为小型水电解制氢装置供电。

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引用次数: 0

Metal-organic framework grafted alginate polymer As high-performance electrolytes for zinc-ion batteries 金属有机骨架接枝藻酸盐聚合物作为锌离子电池的高性能电解质

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-01-09 DOI: 10.1016/j.jpowsour.2026.239272

Silong Tian , Yangyang Ding , Zhongdong Tian , Shilu Zhang , Faguo Li , Fengwei Shi , Jun Mei

Zinc-ion batteries (ZIBs) have gained attention as promising alternatives to conventional energy storage systems due to their enhanced safety and low cost. However, their widespread commercialization has been hindered by low Coulombic efficiency and limited cycle life, which are primarily caused by zinc dendrite formation and parasitic side reactions at the anode. This study presents an innovative solution through the development of a multifunctional composite electrolyte (SME), fabricated by immobilizing UiO-66-NH₂ on sodium alginate (SA) matrix via amidation reaction and incorporating EDTA-2Na as an electrolyte additive. The optimized SME electrolyte exhibits exceptional electrochemical properties, achieving an ionic conductivity of 3.81 × 10⁻² S cm⁻¹ and a high Zn²⁺ transference number of 0.55. Electrochemical evaluations reveal the outstanding performance of SME, including an initial discharge capacity of 178.6 mAh g⁻¹ and remarkable capacity retention of 142.3 mAh g⁻¹ after 1000 cycles. Results demonstrate that the SME system effectively addresses the fundamental limitations of zinc-ion batteries, significantly enhancing capacity, rate capability, and long-term cycling stability, thereby advancing their practical feasibility for next-generation energy storage applications.

锌离子电池（zib）由于其更高的安全性和较低的成本而成为传统储能系统的有前途的替代品，受到了人们的关注。然而，由于锌枝晶的形成和阳极的寄生副反应导致的库仑效率低和循环寿命有限，阻碍了它们的广泛商业化。本研究提出了一种创新的解决方案，即通过酰胺化反应将uuo -66- nh2固定在海藻酸钠（SA）基质上，并加入EDTA-2Na作为电解质添加剂制备多功能复合电解质（SME）。优化后的SME电解质具有优异的电化学性能，离子电导率为3.81 × 10−2 S cm−1，Zn2+转移数为0.55。电化学评价表明，SME具有优异的性能，包括178.6 mAh g - 1的初始放电容量和1000次循环后的142.3 mAh g - 1的显着容量保持。结果表明，SME系统有效地解决了锌离子电池的基本局限性，显著提高了容量、倍率能力和长期循环稳定性，从而提高了其在下一代储能应用中的实际可行性。

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引用次数: 0

Impact of electrolyte and SEI passivity on thermal runaway: A comparative DSC and ARC analysis of anode-free lithium metal batteries 电解液和SEI钝化对热失控的影响：无阳极锂金属电池DSC和ARC对比分析

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-01-09 DOI: 10.1016/j.jpowsour.2026.239261

Dongliang Chen , Jie Liao , Zachary J. Trdinich , Chaoyang Wang , Feifei Shi

During battery safety tests, there is a typical discrepancy between small-scale coin cells and large-format pouch cells. Academic studies usually employ small-scale coin cells using differential scanning calorimetry (DSC) for fundamental understanding, whereas industry relies on large-scale cells using accelerating rate calorimetry (ARC) to evaluate safety risks, leading to a critical knowledge gap in translating lab-scale findings to practical applications. In this work, we assessed the safety of anode free lithium metal batteries (AFLMBs) for both large and small scales by comparing DSC and ARC. The higher state of charge (SOC) and cycling numbers will reduce AFLMB safety, and higher charge rates tend to form a more reactive lithium metal anode. The passivation effect of solid electrolyte interphase (SEI) on deposited lithium can reduce the self-heating temperature rate of the battery after cycling. This work bridges the understanding of AFLMBs' safety from small scale to large scales, which will greatly benefit the knowledge translation between academia and industry.

在电池安全测试中，小型硬币电池和大型袋状电池之间存在典型的差异。学术研究通常使用差示扫描量热法（DSC）进行小规模硬币电池的基本理解，而工业依赖于使用加速速率量热法（ARC）的大规模电池来评估安全风险，导致在将实验室规模的发现转化为实际应用方面存在关键的知识差距。在这项工作中，我们通过比较DSC和ARC来评估大型和小型无阳极锂金属电池（aflmb）的安全性。较高的荷电状态（SOC）和循环次数会降低AFLMB的安全性，而较高的充电率往往会形成更具活性的锂金属阳极。固体电解质界面（SEI）对沉积锂的钝化作用可以降低电池循环后的自热温度速率。这项工作将对aflmb安全性的认识从小尺度过渡到大尺度，这将大大有利于学术界和工业界之间的知识转化。

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引用次数: 0

Design and optimisation of a reference electrode integrated anion exchange membrane water electrolyser for hydrogen production 参考电极集成阴离子交换膜制氢水电解槽的设计与优化

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-01-09 DOI: 10.1016/j.jpowsour.2026.239271

Cheng Lyu , James Yule , Mikey Jones , Jack Corbin , Zhenyu Zhang , Xiaohong Li , Karen Hudson-Edwards , Haijiao Lu , Lianzhou Wang , Zhiliang Wang , Gang Wang , Ye Chen , Wenjun Zhang , Hua Zhang

Zero-gap water electrolysers have shown their potential in large scale green hydrogen production, but their cost effectiveness and long-term durability remain limited by an incomplete understanding of electrocatalysts and electrode materials behaviour during full-cell electrolysis. Here, a gasket-free anion exchange membrane water electrolyser (AEMWE) has been designed with an integrated reference electrode (RE) next to the membrane electrode assembly (MEA). A zero-gap design between the electrode and the membrane is achieved without the limitations of a gasket, ensuring close contact and minimising the system resistance and allowing precise monitoring of anode and cathode potentials individually during electrolysis. With NiFe(OH)₂ as the anode catalyst and Ni_xS_y as the cathode catalyst, electrolysis at a current density of 500 mA cm⁻² was achieved at 1.86 V cell voltage with 1 M KOH electrolyte at 333 K. Electrochemical impedance spectroscopy (EIS) measurement with a Hg/HgO reference electrode during the electrolysis at the same conditions further reveal the potential loss distribution: 0.10 V from IR drop, 0.35 V from anode and 0.27 V from cathode. These results demonstrate a simple but useful platform for decoupling performance-limiting processes in AEMWE systems and guiding the design of more durable and efficient electrolysers.

零间隙水电解槽已经显示出其在大规模绿色制氢方面的潜力，但由于对电催化剂和电极材料在全电池电解过程中的行为的不完全了解，其成本效益和长期耐用性仍然受到限制。本文设计了一种无衬垫阴离子交换膜电解槽（AEMWE），其参考电极（RE）位于膜电极组件（MEA）旁边。电极和膜之间的零间隙设计没有衬垫的限制，确保紧密接触，最大限度地减少系统电阻，并允许在电解过程中分别精确监测阳极和阴极电位。以NiFe(OH)2为阳极催化剂，NixSy为阴极催化剂，在1.86 V电池电压、1 M KOH电解质和333 K条件下，实现了电流密度为500 mA cm−2的电解。在相同条件下，使用Hg/HgO参考电极进行电解过程的电化学阻抗谱（EIS）测量进一步揭示了电位损耗分布：红外降0.10 V，阳极0.35 V，阴极0.27 V。这些结果证明了一个简单而有用的平台，可以解耦AEMWE系统中性能限制过程，并指导设计更耐用、更高效的电解槽。

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引用次数: 0

Synergy in silence: Microbial communities driving green energy in Microbial Fuel Cells 沉默中的协同作用：微生物群落在微生物燃料电池中驱动绿色能源

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-01-09 DOI: 10.1016/j.jpowsour.2026.239274

Vaidhegi Kugarajah, Chris Felshia, Hardika, Jenifer Jaishankar

Microbial Fuel Cells (MFCs) leverage the interaction between microbes and electrodes for various applications, including bioelectricity production, wastewater treatment, creating value-added products, and bioremediation. At the core is the microbe's ability to interact and transfer electrons to the electrode. Predicting microbial dynamics and electron transfer mechanisms is essential for uncovering the fundamental processes within MFC microbial communities. Over the years, a wide variety of microorganisms have been identified for their unique ability to interact with a wide range of acceptors and donors through direct or indirect transfer, as well as symbiotic relationships involving electron exchange with the electrode. While the electron transfer mechanism of certain microorganisms is well established, others remain uncertain. This review examines the composition of microbial communities, their electron transfer mechanisms, factors influencing microbial populations, synergistic interactions, methods to identify the microbial communities, and the impact of microbial consortia on MFCs. Overall, this review highlights the major types of microbial communities essential for optimizing MFC performance, along with their functional and taxonomic traits related to electron transfer, offering valuable insights for researchers working in microbial electrochemical technologies.

微生物燃料电池（mfc）利用微生物和电极之间的相互作用，用于各种应用，包括生物发电、废水处理、创造增值产品和生物修复。核心是微生物相互作用和将电子转移到电极的能力。预测微生物动力学和电子传递机制对于揭示MFC微生物群落的基本过程至关重要。多年来，各种各样的微生物已被确定为其独特的能力，通过直接或间接转移与广泛的受体和供体相互作用，以及涉及电子交换与电极的共生关系。虽然某些微生物的电子传递机制已经确立，但其他微生物的电子传递机制仍不确定。本文综述了微生物群落的组成、它们的电子转移机制、影响微生物种群的因素、协同作用、鉴定微生物群落的方法以及微生物群落对mfc的影响。总的来说，本文重点介绍了优化MFC性能所必需的主要微生物群落类型，以及它们与电子转移相关的功能和分类特征，为微生物电化学技术的研究人员提供了有价值的见解。

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引用次数: 0

Interfacial engineering of garnet electrolyte via acid treatment for solid-state lithium metal batteries 固态锂金属电池用石榴石电解质酸处理界面工程

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-01-09 DOI: 10.1016/j.jpowsour.2026.239280

Wenhan Kong , Suqing Wang , Haixing Liu , Zihao Wang , Haihui Wang

Li_6.5La₃Zr_1.5Ta_0.5O₁₂ (LLZTO) possesses high ionic conductivity, a broad electrochemical window, and compatibility with Li metal, rendering it a highly promising candidate for solid-state Li metal batteries (SSLMBs). However, its susceptibility to air induces the formation of Li₂CO₃ on the surface, thereby deteriorating interfacial contact with Li metal, which remains a formidable challenge. Herein, a facile acid-treatment strategy has been developed to eliminate the undesirable Li₂CO₃ while introducing a lithiophilic layer enriched with Li-salts. Subsequent chemical reactions between the surface lithium salts and molten Li lead to the formation of a functional interlayer. The Li₃N and Li₂N₂O₂ components within the interlayer enable an intimate Li|LLZTO interface, thereby markedly reducing interfacial resistance. Furthermore, the lithiophobic Li₃N and Li₂O species effectively suppress the nucleation and penetration of Li dendrites. As a result, the Li symmetric cell delivers a low interfacial impedance of 6.4 Ω cm², a high critical current density of 1.35 mA cm⁻² at 30 °C, and a prolonged lifespan exceeding 3300 h at 0.2 mA cm⁻². The Li|HN-LLZTO|LiFePO₄ cell maintains 85% of its initial capacity after 400 stable cycles at 0.5 C and exhibits outstanding rate capability (135 mAh g⁻¹ at 2 C), underscoring the practical viability of this strategy.

Li6.5La3Zr1.5Ta0.5O12 （LLZTO）具有高离子电导率、宽电化学窗口和与锂金属的相容性，是固态锂金属电池（sslmb）极具前景的候选材料。然而，它对空气的敏感性导致其表面形成Li2CO3，从而恶化了与锂金属的界面接触，这仍然是一个艰巨的挑战。本文提出了一种简单的酸处理策略，以消除不需要的Li2CO3，同时引入富含锂盐的亲锂层。随后的表面锂盐和熔融锂之间的化学反应导致功能夹层的形成。中间层中的Li3N和Li2N2O2组分形成了一个紧密的Li|LLZTO界面，从而显著降低了界面阻力。疏石Li3N和Li2O能有效抑制锂枝晶的成核和渗透。因此，锂对称电池具有6.4 Ω cm2的低界面阻抗，在30°C时具有1.35 mA cm - 2的高临界电流密度，在0.2 mA cm - 2时具有超过3300小时的长寿命。Li|HN-LLZTO|LiFePO4电池在0.5 C下稳定循环400次后仍保持85%的初始容量，并表现出出色的倍率能力（2 C下135 mAh g - 1），强调了该策略的实际可行性。

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引用次数: 0

Enhanced electrochemical performance and extended cycling of resorcinol-formaldehyde derived N-doped carbon xerogel for alkali metal-ion (Li/Na/K) batteries 间苯二酚-甲醛衍生n掺杂碳干凝胶用于碱金属离子（Li/Na/K）电池的电化学性能和延长循环时间

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-01-09 DOI: 10.1016/j.jpowsour.2026.239254

Mayur Gaikwad , Samhita Pappu , Anil Pathak , Chandra Sharma , Prashant N. Kumta

Resorcinol formaldehyde-derived carbon xerogel (RFC) is a versatile material with tuneable properties, synthesized through a simple sol-gel method. This study presents nitrogen-doped RF carbon xerogel (N-RFC) with 11.8 at% nitrogen doping, offering a microporous architecture ideal for alkali metal-ion (Li, Na, K) batteries. The porous N-doped framework enhances electrochemical performance by improving ion transport, increasing active storage sites, and significantly boosting metal-ion adsorption, particularly through pyrrolic nitrogen, as revealed by first-principles calculations supported by XPS analysis. N-RFC anodes showed excellent cycling stability, high-capacity retention, and fast charge/discharge capabilities, rendering them suitable for commercial applications. Notably, the N-RFC anode demonstrates high-rate long-term cycling stability, retaining its capacity of 83.5 % (188 mAh/g at 2 C-rate) and 50 % (133 mAh/g at 1250 mA/g) over 1000 cycles for Li and Na-ion batteries, respectively, favorable for commercial battery applications. Additionally, N-RFC demonstrates a reversible capacity of 120 mAh/g after 394 cycles with a retention of 82 % for K-ion batteries. The ability of the material to accommodate larger ions like Na⁺ and K⁺ further emphasizes its versatility and potential application in diverse alkali metal-ion battery systems.

间苯二酚甲醛衍生的碳干凝胶（RFC）是一种具有可调性能的多功能材料，通过简单的溶胶-凝胶法合成。本研究提出了氮掺杂11.8%的RF碳干凝胶（N-RFC），为碱金属离子（Li, Na， K）电池提供了理想的微孔结构。XPS分析支持的第一性原理计算表明，多孔n掺杂框架通过改善离子传输，增加活性存储位点，显著促进金属离子吸附，特别是通过吡啶氮吸附，从而提高了电化学性能。N-RFC阳极表现出优异的循环稳定性、高容量保持和快速充放电能力，适合商业应用。值得注意的是，N-RFC阳极表现出高速率的长期循环稳定性，在1000次循环中，锂离子电池和钠离子电池的容量分别保持在83.5% （2c倍率下188 mAh/g）和50% (1250 mA/g时133 mAh/g)，有利于商业电池的应用。此外，N-RFC在394次循环后的可逆容量为120 mAh/g， k离子电池的保留率为82%。该材料容纳较大离子（如Na+和K+）的能力进一步强调了其通用性和在各种碱金属离子电池系统中的潜在应用。

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引用次数: 0

In-situ polymerized SiOx/N-doped carbon coating layer on graphite as a wide-temperature-range fast-charging anode for lithium-ion batteries 石墨上原位聚合SiOx/ n掺杂碳涂层作为锂离子电池宽温度范围快速充电阳极

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-01-09 DOI: 10.1016/j.jpowsour.2026.239286

Min Zhong , Yajuan Guo , Haoyang Tong , Wenzhuo Shen , Jiali Zhang , Shouwu Guo

The construction of a composites with the traditional graphite and the novel SiO_x is a promising and practical strategy to balance the high capacity, high rate performance, and long-term cyclability. In this work, graphite/SiO_x/N-doped carbon composites are prepared via in-situ polymerization between 3-aminopropyltrieth-oxysilane and terephthalaldehyde on spherical graphite, followed by pyrolysis. The N-doped carbon layer, uniformly distributed with SiO_x nanoparticles, is coated onto graphite, facilitating the formation of a robust solid electrolyte interphase that afforded a fast kinetic characteristic over wide-temperature-range. The electrochemical performance is investigated over wide-temperature-range, including low temperature (−20 °C), room temperature (25 °C), and high temperature (50 °C). The optimal composite delivers high rate performance of 333.4 mAh g⁻¹ at 2C, excellent long-term stability of 500 cycles at 5C without any capacity fade, and a remarkable average coulombic efficiency of 99.9 %. And 47.6 % at 0.1C and 90.6 % at 1C of capacity retention is exhibited for the optimal composite at −20 and 50 °C, but 11.2 % and 80.0 % for pristine spherical graphite. This work sheds light on a facile strategy for synthesizing the high-capacity, high-rate, and high-stability anode materials for lithium-ions batteries with high-energy-density, high-power-density, and safety.

传统石墨和新型SiOx复合材料的构建是一种很有前途的实用策略，可以平衡高容量、高速率性能和长期循环性能。本文通过3-氨基丙基三乙基氧硅烷和对苯二甲酸乙二醛在球形石墨上原位聚合，制备了石墨/SiOx/ n掺杂碳复合材料，然后进行热解。氮掺杂的碳层均匀分布在SiOx纳米颗粒上，涂覆在石墨上，促进了坚固的固体电解质界面的形成，在宽温度范围内提供了快速的动力学特性。在低温（- 20°C）、室温（25°C）和高温（50°C）的较宽温度范围内研究了电化学性能。最佳复合材料在2C时具有333.4 mAh g−1的高倍率性能，在5C下具有500次循环的优异长期稳定性，没有任何容量衰减，平均库仑效率达到99.9%。在- 20和50℃时，最佳复合材料的容量保留率分别为47.6%和90.6%，而原始球形石墨的容量保留率分别为11.2%和80.0%。这项工作为合成具有高能量密度、高功率密度和安全性的锂离子电池的高容量、高速率和高稳定性阳极材料提供了一个简单的策略。

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引用次数: 0

Analyzing the impact of charging profiles on the reliability and failure rate of HV-battery fuses in electric vehicles using a novel β-flexible Weibull approach 采用一种新颖的β-柔性威布尔方法分析了充电方式对电动汽车高压电池熔断器可靠性和故障率的影响

IF 7.9 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Journal of Power Sources

Pub Date : 2026-01-09 DOI: 10.1016/j.jpowsour.2026.239268

Oliver Makan , Kai-Peter Birke

In High-Voltage (HV) battery systems, fuses are critical safety components designed to interrupt excessive current flow during faults, such as short circuits or overcurrent conditions. Ensuring their reliability and accurately predicting failure rate is essential for the safety and longevity of battery electric vehicles (BEVs). However, continuous charging and discharging induce aging effects in fuses, potentially leading to unexpected failures. Although safety margins for charging currents are implemented to mitigate sudden fuse melting, these margins leave room for optimization, particularly in reducing charging time.

This study presents an accelerated life test (ALT) to investigate the degradation of HV battery fuses under varying load profiles, simulating real-world stress conditions. We analyze the resulting failure data to assess the impact of charging currents on fuse reliability and hazard rates. A novel β-flexible Weibull model is introduced to better capture non-linear failure patterns across the fuse's life cycle, providing improved prediction over conventional statistical approaches.

The results demonstrate how different charging profiles influence fuse aging and reliability, highlighting opportunities for optimizing charging strategies to reduce battery downtime without compromising safety. This work provides a framework for assessing fuse performance in HV battery applications and supports design decisions in electric vehicle energy systems.

在高压（HV）电池系统中，熔断器是关键的安全部件，用于在短路或过流等故障时中断过大的电流。确保其可靠性和准确预测故障率对于纯电动汽车（bev）的安全性和寿命至关重要。然而，连续充电和放电会引起熔断器的老化效应，可能导致意外故障。虽然充电电流的安全裕度是为了减轻保险丝的突然熔化，但这些裕度为优化留下了空间，特别是在缩短充电时间方面。本研究提出了一种加速寿命试验（ALT）来研究高压电池熔断器在不同负载情况下的退化，模拟真实的应力条件。我们分析了产生的故障数据，以评估充电电流对保险丝可靠性和危险率的影响。引入了一种新颖的β-柔性威布尔模型，以更好地捕获整个保险丝生命周期的非线性失效模式，提供比传统统计方法更好的预测。结果表明，不同的充电方式对保险丝老化和可靠性的影响，突出了优化充电策略以减少电池停机时间而不影响安全性的机会。这项工作为评估高压电池应用中的保险丝性能提供了一个框架，并为电动汽车能源系统的设计决策提供了支持。

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引用次数: 0