Journal of energy storage最新文献_第6页

Co,N and Cu,N Co-doped ZnS with rich sulfur vacancies for high-performance supercapacitors 高性能超级电容器用Co，N和Cu，N共掺杂富硫空位ZnS

IF 8.9 2区工程技术 Q1 ENERGY & FUELS

Journal of energy storage

Pub Date : 2026-01-16 DOI: 10.1016/j.est.2026.120591

Fang Tian , Hui Li , Bo Wang , Yi Cui , Xinfang Zheng , Linyu Wang , Zhifang He , Shumin Wang , Xiaoyang Liu

Ion doping emerged as a remarkable strategy for enhancing the electrochemical performance of transition metal sulfides. In this work, two ion-doped electroactive materials—Co,N co-doped ZnS (Co,N-ZnS) and Cu,N co-doped ZnS (Cu,N-ZnS)—were synthesized via in-situ hydrothermal growth on nickel foam (NF) substrates. Embedding Co,N and Cu,N dopant species within the ZnS matrix produces a vacancy-rich structure that alters the surrounding electronic configuration and significantly enhances the transport of hydroxide ions. The electrochemical performance of the vacancy-rich Co,N-ZnS/NF and Cu,N-ZnS/NF electrodes was systematically evaluated and compared. The 2-Co,N-ZnS/NF electrode outperformed with a specific capacitance of 1554.0 F g⁻¹ at 9 A g⁻¹, in comparison to 1299.0 F g⁻¹ observed for 2-Cu,N-ZnS/NF. Furthermore, density functional theory (DFT) simulations demonstrated that dual incorporation of Co, N or Cu, N dopants substantially increase sulfur vacancy concentration and promote pronounced local charge redistribution. To investigate the effects of modifications on device behavior, asymmetric aqueous supercapacitors based on Co,N-ZnS/NF and Cu,N-ZnS/NF electrodes were constructed and evaluated. A comparison was also conducted between the two devices doped with two different ions. The studies on the electrochemical performance of electrode materials doped with two different ions and their corresponding devices have revealed that doping with cobalt ions exhibits superiority over copper ions in electrochemical energy storage.

离子掺杂是提高过渡金属硫化物电化学性能的重要手段。本文采用原位水热生长的方法在泡沫镍（NF）衬底上合成了Co，N共掺杂ZnS （Co,N-ZnS）和Cu，N共掺杂ZnS （Cu,N-ZnS）两种离子掺杂电活性材料。在ZnS基体中嵌入Co、N和Cu、N掺杂物质，形成富空位结构，改变了周围的电子构型，显著增强了氢氧化物离子的输运。对富空位Co，N-ZnS/NF和Cu，N-ZnS/NF电极的电化学性能进行了系统评价和比较。2-Co，N-ZnS/NF电极在9 a g−1时的比电容为1554.0 F g−1，而2-Cu，N-ZnS/NF电极的比电容为1299.0 F g−1。此外，密度泛函理论（DFT）模拟表明，Co， N或Cu， N掺杂剂的双重掺入大大增加了硫空位浓度，并促进了明显的局部电荷重分布。为了研究修饰对器件行为的影响，构建了基于Co，N-ZnS/NF和Cu，N-ZnS/NF电极的不对称水性超级电容器并对其进行了评价。并对掺杂两种不同离子的器件进行了比较。对掺杂两种不同离子的电极材料及其相应器件的电化学性能研究表明，掺杂钴离子在电化学储能方面优于铜离子。

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引用次数: 0

Synergistic ZnS@Co₃O₄/MXene hybrid derived from ZIF-67 for high-performance supercapacitors 用于高性能超级电容器的Synergistic ZnS@Co₃O₄/MXene杂化物源自ZIF-67

IF 8.9 2区工程技术 Q1 ENERGY & FUELS

Journal of energy storage

Pub Date : 2026-01-16 DOI: 10.1016/j.est.2026.120420

Ali Raza , Naseem Iqbal , Rimsha Mehek , Tayyaba Noor , Neelam Zaman , Jungu Gao

Supercapacitors have garnered significant interest from researchers owing to their high-power density, rapid charge/discharge capabilities, and extended cycle life. In this context, the design and development of electrode materials that offer both high performance and enhanced stability remain key areas of investigation in supercapacitor research. In this work, a novel ZnS@Co₃O₄/MXene composite was successfully synthesized via a co-assembly strategy using (Zeolitic imidazolate framework) ZIF-67 and ZIF-8 as a precursor for Co₃O₄ and ZnS. The structural, morphological, and surface characteristics of the composite were systematically investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). XRD confirmed the successful formation of crystalline Co₃O₄ and ZnS phases anchored on the Ti₃C₂Tₓ MXene layers, while SEM images revealed a uniformly distributed network of ZnS and Co₃O₄ nanoparticles anchored on the MXene sheets. XPS analysis further verified the coexistence of Zn²⁺, Co²⁺/Co³⁺, and TiC surface bonds. Electrochemical investigations demonstrated outstanding pseudocapacitive performance, with a high specific capacitance of 306 F/g at 1 A/g and a low charge-transfer resistance (Rct = 3.2 Ω). Moreover, the electrode retained 88 % of its initial capacitance after 5000 cycles, reflecting excellent structural stability and durability. These results establish ZnS@Co₃O₄/MXene as a highly promising and efficient electrode material for next-generation high-performance supercapacitors.

超级电容器因其高功率密度、快速充放电能力和延长循环寿命而引起了研究人员的极大兴趣。在这种背景下，设计和开发既能提供高性能又能提高稳定性的电极材料仍然是超级电容器研究的关键领域。在这项工作中，利用（沸石咪唑盐框架）ZIF-67和ZIF-8作为Co₃O₄和ZnS的前驱体，通过共组装策略成功合成了一种新的ZnS@Co₃O₄/MXene复合材料。采用x射线衍射（XRD）、扫描电子显微镜（SEM）和x射线光电子能谱（XPS）系统地研究了复合材料的结构、形态和表面特征。XRD证实在Ti₃C₂TₓMXene层上成功形成了晶体Co₃O₄和ZnS相，而SEM图像显示在MXene层上锚定了一个均匀分布的ZnS和Co₃O₄纳米颗粒网络。XPS分析进一步证实了Zn2+、Co2+/Co3+和TiC表面键的共存。电化学研究显示了优异的赝电容性能，在1 a /g时具有306 F/g的高比电容和低电荷转移电阻（Rct = 3.2 Ω）。此外，在5000次循环后，电极保持了88%的初始电容，反映了优异的结构稳定性和耐用性。这些结果表明ZnS@Co₃O₄/MXene是一种非常有前途的高效电极材料，用于下一代高性能超级电容器。

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引用次数: 0

Advances in the mixed matrix membrane for vanadium redox flow battery 钒氧化还原液流电池混合基质膜研究进展

IF 8.9 2区工程技术 Q1 ENERGY & FUELS

Journal of energy storage

Pub Date : 2026-01-16 DOI: 10.1016/j.est.2025.120092

Chetan M. Pawar , Pooja Madiyan , Dhananjay D. Khairnar , Devendra Y. Nikumbe , Dhruv Davra , Sooraj Sreenath , Rajaram K. Nagarale

Mixed matrix membranes (MMMs) represent a significant advancement in the pursuit of high-performance vanadium redox flow batteries (VRFBs), offering a promising substitute to conventional ion exchange membranes (IEMs). By synergistically incorporating organic or inorganic fillers into polymer matrices, MMMs aim to overcome the enduring trade-off between metal ion selectivity and proton conductivity, two crucial factors of VRFB efficiency. MMMs have demonstrated significant potential in suppressing hydrated vanadium ion crossover while enhancing electrochemical stability and mechanical strength. Advanced nanomaterials, including carbon, inorganic, and porous fillers, are combined to modify membrane architecture at the molecular level, thereby permitting superior ionic transport pathways and continuing durability. Despite these advancements, challenges such as microstructural defects, long-term degradation, and the absence of standardized testing procedures hinder broader commercial adoption. Future research must focus on scalable fabrication techniques, refined polymer-filler interfaces, and predictive modeling via machine learning to address these limitations. Environmentally sustainable MMMs incorporating bio-based materials also present a promising frontier. This review elucidates recent progress, key challenges, and future directions, underscoring the pivotal role of MMMs in driving next-generation VRFBs for sustainable, large-scale energy storage applications.

混合基质膜（MMMs）代表了高性能钒氧化还原液流电池（vrfb）的重大进步，为传统离子交换膜（IEMs）提供了一个有前途的替代品。通过将有机或无机填料协同加入到聚合物基体中，MMMs旨在克服金属离子选择性和质子电导率之间的长期权衡，这是VRFB效率的两个关键因素。MMMs在抑制水合钒离子交叉、提高电化学稳定性和机械强度方面具有显著的潜力。先进的纳米材料，包括碳、无机和多孔填料，被结合起来在分子水平上修饰膜结构，从而允许优越的离子传输途径和持续的耐久性。尽管取得了这些进步，但诸如微观结构缺陷、长期退化以及缺乏标准化测试程序等挑战阻碍了更广泛的商业应用。未来的研究必须集中在可扩展的制造技术、改进的聚合物填料界面以及通过机器学习进行预测建模来解决这些限制。采用生物基材料的环境可持续mm也呈现出前景广阔的前沿。这篇综述阐述了最近的进展、主要挑战和未来的方向，强调了MMMs在推动下一代vrfb可持续大规模储能应用中的关键作用。

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引用次数: 0

Optimized fast-charging of lithium-ion battery packs via predictive-reinforcement hierarchical control framework 基于预测强化分层控制框架的锂离子电池组快速充电优化

IF 8.9 2区工程技术 Q1 ENERGY & FUELS

Journal of energy storage

Pub Date : 2026-01-16 DOI: 10.1016/j.est.2026.120395

Tian-E Fan , Pei Gao , Yu Wan , Baihua Qu

The advancement of fast and safe charging technology is critical for accelerating the widespread adoption of electric vehicles. However, inherent inconsistencies in battery packs, stemming from manufacturing variations and diverse usage patterns, substantially impair charging efficiency and cycle life. To overcome these limitations, we introduce a predictive-reinforcement control (PRC) framework that unifies deep reinforcement learning (DRL) for long-term policy optimization and model predictive control (MPC) for real-time constraint enforcement, enabling co-optimization of fast charging and active cell balancing in a unified control scheme. Furthermore, a high-fidelity electrothermal-aging coupled model that captures degradation dynamics under aggressive charging conditions. A multi-objective reward function that simultaneously optimizes (i) charging speed via dynamic current modulation, (ii) state-of-charge (SoC) uniformity through current anti-correlation control, and (iii) aging mitigation via explicit degradation constraints. An enhanced deep deterministic policy gradient (DDPG) algorithm featuring prioritized experience replay and asynchronous policy updates, enhances training stability and reduce the fluctuations of the training curve. Experimental validation demonstrates significant improvements over state-of-the-art approaches (constant current–constant voltage (CCCV), multi-stage constant current (MSCC) and standalone DRL) by 30.73 % faster charging than MSCC, 93.27 % reduction in SoC imbalance versus passive balancing methods, excellent thermal management (U_T(temperature uniformity coefficient) < 0.32, 33.26 % reduction over CCCV) and minimal capacity fade (0.02 % per cycle vs. 0.04 % for DRL-only). These advances highlight the advantages of the PRC framework in battery charging management and provide new directions for the development of next-generation battery management systems (BMS).

快速和安全充电技术的进步对于加速电动汽车的广泛采用至关重要。然而，电池组的内在不一致性，源于生产的变化和不同的使用模式，极大地影响了充电效率和循环寿命。为了克服这些限制，我们引入了一个预测-强化控制（PRC）框架，该框架将用于长期策略优化的深度强化学习（DRL）和用于实时约束执行的模型预测控制（MPC）结合起来，从而在统一的控制方案中实现快速充电和有源电池平衡的协同优化。此外，还建立了一个高保真的电热老化耦合模型，该模型捕捉了在剧烈充电条件下的降解动力学。一个多目标奖励函数，同时优化(i)通过动态电流调制的充电速度，（ii）通过电流反相关控制的充电状态（SoC）均匀性，以及（iii）通过显式退化约束的老化缓解。一种增强的深度确定性策略梯度（DDPG）算法，具有优先的经验重播和异步策略更新，增强了训练稳定性，减少了训练曲线的波动。实验验证表明，与最先进的方法（恒流-恒压（CCCV）、多级恒流（MSCC）和独立DRL）相比，充电速度比MSCC快30.73%，与被动平衡方法相比，SoC不平衡降低93.27%，出色的热管理（U_T（温度均匀系数）& 0.32，比CCCV降低33.26%）和最小的容量衰减（每循环0.02%，而DRL仅为0.04%）。这些进展突出了PRC框架在电池充电管理方面的优势，并为下一代电池管理系统（BMS）的发展提供了新的方向。

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引用次数: 0

A comprehensive study on the degradation mechanism of CoS2 accelerated by the synergistic effect of H2O and O2 全面研究H2O和O2协同作用加速降解co_2的机理

IF 8.9 2区工程技术 Q1 ENERGY & FUELS

Journal of energy storage

Pub Date : 2026-01-16 DOI: 10.1016/j.est.2026.120477

Hongliang Li, Yicheng Wei, Jinxu Qiu, Ling Ding, Lezhen Hua, Qixiu Luo, Fang Chang, Chenyang Gao, Yong Xie, Yong Cao, Yanhua Cui

The CoS₂ material plays a critical role in catalysis and battery fields owing to its efficient catalytic activity sites, high electron conductivity, and large capacity properties. However, their intrinsic structural stability and electrochemical activity are seriously affected by the atmospheric environment, such as rapid capacity decay from 318.10 to 169.80 mAh g⁻¹ merely after storage in humid O₂ for 9 days, provoking extensive storage and application alarms. In view of the state-of-the-art vagueness on such degradation mechanisms, clarifying the degradation chemistry in CoS₂ is the key to upholding dependable performances. Herein, we combine the experiments with density functional theory (DFT) calculation approaches to disclose the degradation reaction processes of CoS₂ in various storage conditions. The results show that the CoS₂ is more sensitive in the humid O₂ atmosphere than in single H₂O or O₂ conditions because the oxidation reaction occurs preferentially from the Co atoms located at the adjacent position of the S-vacancy, which triggers *O formation and developing into *SO₃ and *SO₄. Meanwhile, the existence of *O would also promote the dissociation of H₂O to form H⁺ and promote the final formation of SO₄²⁻ by lowering the energy barrier, conversely. Consequently, degradation products of CoS₂ under ambient air can be clearly identified as CoSO₄ and H₂SO₄. This work described above importantly provides a theoretical basis for further modification and reliable application of CoS₂.

CoS2材料以其高效的催化活性位点、高电子导电性和大容量性能在催化和电池领域发挥着重要作用。然而，其固有的结构稳定性和电化学活性受到大气环境的严重影响，例如仅在潮湿的O2中储存9天后，容量就从318.10 mAh g−1迅速衰减到169.80 mAh g−1，引起了广泛的储存和应用警报。鉴于这种降解机制目前尚不明确，澄清CoS2中的降解化学是保持可靠性能的关键。本文将实验与密度泛函理论（DFT）计算方法相结合，揭示了不同储存条件下CoS2的降解反应过程。结果表明，相对于单一的H2O或O2环境，co_2在潮湿的O2环境中更敏感，这是因为氧化反应优先发生在s空位相邻位置的Co原子上，从而触发*O生成并发展成*SO3和*SO4。同时，*O的存在也会通过降低能垒，促进H2O的解离生成H+，从而促进SO42−的最终生成。因此，在环境空气下，CoS2的降解产物可以明确地识别为CoSO4和H2SO4。上述工作为进一步改进和可靠应用CoS2提供了重要的理论基础。

{"title":"A comprehensive study on the degradation mechanism of CoS2 accelerated by the synergistic effect of H2O and O2","authors":"Hongliang Li, Yicheng Wei, Jinxu Qiu, Ling Ding, Lezhen Hua, Qixiu Luo, Fang Chang, Chenyang Gao, Yong Xie, Yong Cao, Yanhua Cui","doi":"10.1016/j.est.2026.120477","DOIUrl":"10.1016/j.est.2026.120477","url":null,"abstract":"<div><div>The CoS<sub>2</sub> material plays a critical role in catalysis and battery fields owing to its efficient catalytic activity sites, high electron conductivity, and large capacity properties. However, their intrinsic structural stability and electrochemical activity are seriously affected by the atmospheric environment, such as rapid capacity decay from 318.10 to 169.80 mAh g<sup>−1</sup> merely after storage in humid O<sub>2</sub> for 9 days, provoking extensive storage and application alarms. In view of the state-of-the-art vagueness on such degradation mechanisms, clarifying the degradation chemistry in CoS<sub>2</sub> is the key to upholding dependable performances. Herein, we combine the experiments with density functional theory (DFT) calculation approaches to disclose the degradation reaction processes of CoS<sub>2</sub> in various storage conditions. The results show that the CoS<sub>2</sub> is more sensitive in the humid O<sub>2</sub> atmosphere than in single H<sub>2</sub>O or O<sub>2</sub> conditions because the oxidation reaction occurs preferentially from the Co atoms located at the adjacent position of the S-vacancy, which triggers *O formation and developing into *SO<sub>3</sub> and *SO<sub>4</sub>. Meanwhile, the existence of *O would also promote the dissociation of H<sub>2</sub>O to form H<sup>+</sup> and promote the final formation of SO<sub>4</sub><sup>2−</sup> by lowering the energy barrier, conversely. Consequently, degradation products of CoS<sub>2</sub> under ambient air can be clearly identified as CoSO<sub>4</sub> and H<sub>2</sub>SO<sub>4</sub>. This work described above importantly provides a theoretical basis for further modification and reliable application of CoS<sub>2</sub>.</div></div>","PeriodicalId":15942,"journal":{"name":"Journal of energy storage","volume":"151 ","pages":"Article 120477"},"PeriodicalIF":8.9,"publicationDate":"2026-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145969335","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

Core-shell structure ZnS@N-doped carbon composites for lithium storage 核壳结构ZnS@N-doped锂存储用碳复合材料

IF 8.9 2区工程技术 Q1 ENERGY & FUELS

Journal of energy storage

Pub Date : 2026-01-16 DOI: 10.1016/j.est.2026.120638

Miao Miao, Yuan Li, Guanlian Wang, Fang Liu, Longfei Miao, Yonghai Song, Li Wang

This study successfully prepared a core-shell structured nitrogen-doped carbon-coated ZnS (ZnS@NC) composite material using a MOF/COF synergistic derivation strategy to enhance the electrochemical performance of lithium-ion battery anode materials. Using the zinc-based metal-organic framework (Zn-MOF) as the precursor, ZnS@NC composites were constructed by growing a covalent organic framework (COF_TBDP) on Zn-MOF surface followed by pyrolysis. By adjusting the thickness of COF_TBDP-derived nitrogen-doped carbon shell, this study revealed that the ordered porous carbon structure not only significantly shortens the Li⁺ transport pathway but also effectively mitigates the volume expansion of ZnS during charge/discharge cycles through its flexible framework, thereby improving the cycling stability of the material. The optimized ZnS@NC-2 sample maintained a reversible capacity of 579.4 mAh g⁻¹ after 125 cycles at the current density of 0.1 A g⁻¹. This research provides a novel approach for designing transition metal sulfide/carbon-based composite electrode materials and demonstrates promising potential for applications in lithium-ion batteries.

本研究采用MOF/COF协同衍生策略成功制备了核壳结构氮掺杂碳包覆ZnS （ZnS@NC）复合材料，以提高锂离子电池负极材料的电化学性能。以锌基金属-有机骨架（Zn-MOF）为前驱体，通过在Zn-MOF表面生长共价有机骨架（COFTBDP）并进行热解制备ZnS@NC复合材料。本研究通过调整coftbdp衍生的氮掺杂碳壳的厚度，发现有序的多孔碳结构不仅显著缩短了Li+的输运途径，而且通过其灵活的框架有效地减轻了ZnS在充放电循环中的体积膨胀，从而提高了材料的循环稳定性。优化后的ZnS@NC-2样品在0.1 a g−1电流密度下，经过125次循环后仍保持579.4 mAh g−1的可逆容量。该研究为设计过渡金属硫化物/碳基复合电极材料提供了一种新的方法，并在锂离子电池中展示了良好的应用潜力。

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引用次数: 0

Fast sorting of retired lithium-ion batteries: An EIS and VAE-FINCH based soft clustering method 退役锂离子电池的快速分类：一种基于EIS和vee - finch的软聚类方法

IF 8.9 2区工程技术 Q1 ENERGY & FUELS

Journal of energy storage

Pub Date : 2026-01-16 DOI: 10.1016/j.est.2026.120518

Weiwen Peng , Xinhong Wu , Ziyuan Li , Rong Zhu , Xiaojun Tan

The rapid growth of electric vehicles has led to an increasing number of retired lithium-ion batteries, highlighting the need for efficient sorting methods for second-life applications. Traditional methods depend on time-consuming charge–discharge cycling procedures, limiting their practical application in large-scale battery processing facilities. To address this challenge, we propose a fast-sorting framework that integrates electrochemical impedance spectroscopy (EIS) with an ensemble variational autoencoder (VAE)-clustering approach. First, we employ EIS to rapidly and comprehensively extract battery health-related data. Second, we develop an integrated architecture combining a VAE with a first integer neighbor clustering hierarchy (FINCH) algorithm, where the VAE incorporates reconstruction loss with specialized loss functions for state of health and direct current internal resistance. Third, we implement an ensemble-based soft clustering strategy that calculates probability distributions for robust sorting results. Experimental validation on a self-tested 381 retired batteries shows that the proposed method outperforms traditional sorting techniques in clustering accuracy and is approximately 8 times faster than charge and discharge-based methods.

电动汽车的快速发展导致退役锂离子电池的数量不断增加，这凸显了对二次使用的高效分类方法的需求。传统的方法依赖于耗时的充放电循环过程，限制了它们在大规模电池处理设施中的实际应用。为了解决这一挑战，我们提出了一个快速分类框架，该框架将电化学阻抗谱（EIS）与集成变分自编码器（VAE）聚类方法相结合。首先，我们利用EIS快速、全面地提取电池健康相关数据。其次，我们开发了一种将VAE与第一整数邻居聚类层次（FINCH）算法相结合的集成体系结构，其中VAE将重建损失与健康状态和直流内阻的专门损失函数相结合。第三，我们实现了一个基于集成的软聚类策略，计算鲁棒排序结果的概率分布。在381个自测退役电池上进行的实验验证表明，该方法在聚类精度上优于传统的分类技术，并且比基于充放电的方法快约8倍。

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引用次数: 0

The critical role of off-axis indentation in triggering internal structure damage and thermal runaway of lithium-ion batteries 离轴压痕在引发锂离子电池内部结构损伤和热失控中的关键作用

IF 8.9 2区工程技术 Q1 ENERGY & FUELS

Journal of energy storage

Pub Date : 2026-01-16 DOI: 10.1016/j.est.2026.120525

Jinlong Bai , Guohong Tian , Chuang He , Zhirong Wang , Qiong Cai

An indentation test is commonly used to understand the thermal runaway (TR) behavior of lithium-ion batteries (LIBs) under mechanical abuse. There is little understanding in how an off-axis indentation test would trigger battery TR, since most of the indentation tests are performed on-axis (i.e. with the mechanical force perpendicular to the battery surface). In this study, a hemispherical indenter was used to perform indentation tests on fully charged and fully discharged lithium-ion battery pouch cells at different off-axis angles (15°, 30°, 45°) to understand how off-axis indentation would affect TR of LIBs. Computed X-ray tomography was used to characterize fully discharged batteries after the off-axis indentation test to determine their structural damage mode. The layered structural deformation or damage caused by off-axis indentation includes tensile fracture, tensile-inclined fracture, local mud cracks, and wrinkles. The smooth and tough core layer prevents the cracks from extending deeper. The internal short circuit (ISC) is caused by local mud cracks and tensile-inclined fractures. As the off-axis angle increases, the increase in tangential force promotes the formation of tensile-inclined fractures, so a smaller load can trigger TR. The magnitude of the axial force significantly affects the ejection intensity and the flame formation process of the TR. It highlights the serious threat of off-axis mechanical abuse to the safety of lithium-ion batteries.

压痕试验是研究锂离子电池在机械损伤下热失控行为的常用方法。由于大多数压痕测试是在轴上进行的（即与电池表面垂直的机械力），因此对离轴压痕测试如何触发电池TR的理解很少。本研究采用半球形压痕器对充满电和完全放电的锂离子电池袋芯在不同离轴角度（15°、30°、45°）下进行压痕测试，了解离轴压痕对锂离子电池TR的影响。利用计算机x射线断层扫描技术对电池进行离轴压痕试验后的完全放电状态进行表征，以确定电池的结构损伤模式。离轴压痕引起的层状结构变形或破坏包括张性断裂、张性倾斜断裂、局部泥裂缝和起皱。光滑而坚韧的核心层防止裂缝向深处延伸。内部短路（ISC）是由局部泥裂缝和张斜裂缝引起的。随着离轴角的增大，切向力的增大促进了拉伸倾斜断裂的形成，因此较小的载荷可以触发TR，轴向力的大小显著影响TR的弹射强度和火焰形成过程，凸显了离轴机械滥用对锂离子电池安全的严重威胁。

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引用次数: 0

Knowledge mapping analysis of lithium-ion battery fire detection: A bibliometric study 锂离子电池火灾检测的知识图谱分析：文献计量学研究

IF 8.9 2区工程技术 Q1 ENERGY & FUELS

Journal of energy storage

Pub Date : 2026-01-16 DOI: 10.1016/j.est.2026.120648

Jiaxin Wang , Chang Guo , Nan Liu , Ting Liu , Xiaoyu Liang

Against the backdrop of the global transition toward sustainable energy, lithium-ion batteries have been widely adopted in electric vehicles and energy storage systems due to their high energy density and superior cycling performance. However, concerns regarding their thermal safety risks and frequent failure incidents have become increasingly prominent. To systematically review the research progress in this field, this study employs bibliometric methods, analyzing 1216 relevant articles indexed in the Web of Science Core Collection between 2015 and 2024, using VOSviewer and CiteSpace for visualization. The findings reveal a consistent annual growth in publications. China leads globally in terms of publication output, institutional contributions, and international collaboration, with Tsinghua University and University of Science Technology of China among the most active institutions. Highly cited papers are predominantly published in authoritative energy and materials science journals, focusing primarily on enhancing battery durability and optimizing safety performance. Core research themes include “lithium-ion batteries”, “thermal runaway”, “battery management systems”, and “fault diagnosis”. Research hotspots have evolved from fundamental electrochemistry toward materials engineering and intelligent monitoring, with current frontiers centered on oxide electrode materials, sensor integration technologies, and thermal safety management strategies. Future research directions will place greater emphasis on innovations in key materials, system-level intelligent management, and scenario-specific safety solutions for lithium-ion batteries.

在全球向可持续能源转型的大背景下，锂离子电池以其高能量密度和优异的循环性能被广泛应用于电动汽车和储能系统中。然而，对它们的热安全风险和频繁的故障事件的担忧日益突出。为了系统回顾该领域的研究进展，本研究采用文献计量学方法，利用VOSviewer和CiteSpace对2015 - 2024年Web of Science Core Collection收录的1216篇相关文献进行了分析。调查结果显示，出版物的年增长率持续上升。中国在论文发表量、机构贡献和国际合作方面处于世界领先地位，其中清华大学和中国科学技术大学是最活跃的院校之一。高被引论文主要发表在权威的能源和材料科学期刊上，主要关注提高电池耐久性和优化安全性能。核心研究课题包括“锂离子电池”、“热失控”、“电池管理系统”和“故障诊断”。研究热点从基础电化学向材料工程和智能监测发展，目前的研究前沿集中在氧化电极材料、传感器集成技术和热安全管理策略上。未来的研究方向将更加强调锂离子电池关键材料、系统级智能管理和特定场景安全解决方案的创新。

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引用次数: 0

Preparation of N, S co-doped porous carbon derived from degradative solvent extraction product of rice straw for high performance supercapacitor 稻秆降解溶剂萃取产物N， S共掺杂多孔碳制备高性能超级电容器

IF 8.9 2区工程技术 Q1 ENERGY & FUELS

Journal of energy storage

Pub Date : 2026-01-16 DOI: 10.1016/j.est.2026.120619

Tippapon Tocuweang , Darunee Aussawasathien , Nakorn Worasuwannarak

In this study, activated carbon from soluble fractions derived from rice straw is prepared at 700 °C using KOH as the activating agent. Subsequently, dual heteroatom doping is carried out by incorporating nitrogen and sulfur species through thiourea treatment. The prepared carbon specimens are labeled as ACNS-X-Y, where X represents the thiourea proportion and Y indicates the doping duration. These prepared materials serve as electrodes for electric double-layer capacitors (EDLCs). Among them, the ACNS-8-120 sample exhibits outstanding properties, featuring a high specific surface area of 1837 m² g⁻¹ and considerable heteroatom contents, specifically 3.1 wt% nitrogen and 4.5 wt% sulfur. Electrochemical characterization reveals that this electrode material achieves an impressive capacitance value of 340 F g⁻¹ when tested in 6 M KOH electrolyte. Furthermore, the material maintains 95.7% capacitance retention after 5000 continuous charge–discharge cycles, demonstrating robust long-term stability. The ACNS-8-120 sample also delivers exceptional performance in a symmetric two-electrode system, showing a capacitance of 117 F g⁻¹ and an energy density of 16.3 Wh kg⁻¹ at 0.5 A g⁻¹ current density. These findings demonstrate that activated carbon from rice-straw-derived Soluble fractions, followed by nitrogen and sulfur co-doping, is a highly promising carbon electrode material for high-performance supercapacitors.

本研究以稻秆水溶性组分为原料，以KOH为活化剂，在700℃下制备活性炭。随后，通过硫脲处理将氮和硫掺杂到双杂原子掺杂中。将制备的碳样标记为ACNS-X-Y，其中X表示硫脲比例，Y表示掺杂时间。这些制备的材料用作电双层电容器（edlc）的电极。其中，ACNS-8-120样品表现出优异的性能，具有1837 m2 g−1的高比表面积和可观的杂原子含量，特别是3.1 wt%的氮和4.5 wt%的硫。电化学表征表明，该电极材料在6 M KOH电解液中达到了令人印象深刻的340 F g−1的电容值。此外，该材料在5000次连续充放电循环后保持95.7%的电容保持率，显示出强大的长期稳定性。ACNS-8-120样品在对称双电极系统中也提供了卓越的性能，在0.5 a g−1电流密度下显示出117 F g−1的电容和16.3 Wh kg−1的能量密度。这些发现表明，从水稻秸秆提取的可溶性组分中提取活性炭，然后进行氮和硫共掺杂，是一种非常有前途的高性能超级电容器碳电极材料。

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