电解液、电荷状态和应变速率对锂离子电池电极和隔膜力学性能的影响

IF 9.5 2区 材料科学 Q1 CHEMISTRY, PHYSICAL
Shuguo Sun, Bo Rui, Xijun Tan, Saurabh Bahuguna, Jun Zhou and Jun Xu
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引用次数: 0

摘要

电极材料的机械性能对锂离子电池(lib)的机械、电气和热性能、安全性和耐用性至关重要。虽然机械测试通常用于阐明电极材料的基本行为,但大多数现有研究都集中在干电极上,无法完全捕获电池内条件。为了解决这一空白,本研究通过压缩和拉伸测试,全面研究了SOC、电解质和应变速率对阴极和阳极力学行为的耦合影响。该研究首先分离了SOC和电解质的影响,然后分析了它们的耦合效应。不同条件下的扫描电子显微镜(SEM)表征被用来揭示驱动这些行为的潜在机制。结果表明,SOC、电解质存在和应变速率之间的相互作用显著影响电极的力学响应。这些发现为了解实际负载条件下电池组件的行为提供了重要见解,展示了多孔材料中固液耦合相互作用的复杂性,并为改进LIB安全性和耐久性的评估和设计提供了基础。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Effects of electrolyte, state of charge, and strain rate on the mechanical properties of lithium-ion battery electrodes and separators†

Effects of electrolyte, state of charge, and strain rate on the mechanical properties of lithium-ion battery electrodes and separators†

The mechanical properties of electrode materials are critical to the mechanical, electrical, and thermal performance, safety, and durability of lithium-ion batteries (LIBs). While mechanical testing is often conducted to elucidate the fundamental behavior of electrode materials, most existing studies focus on dry electrodes, which fail to fully capture the in-cell conditions. To address this gap, this study provides a comprehensive investigation of the coupled effects of SOC, electrolyte, and strain rate on the mechanical behavior of cathodes and anodes through compression and tensile testing. The study begins by isolating the impacts of SOC and electrolyte individually, followed by an analysis of their coupling effects. Scanning electron microscopy (SEM) characterization under diverse conditions is employed to uncover the underlying mechanisms driving these behaviors. Results reveal that the interplay between SOC, electrolyte presence, and strain rate significantly influences the mechanical responses of electrodes. These findings offer critical insights into the behavior of battery components under realistic loading conditions, demonstrating the complexity of the coupling of solid–liquid interactions in porous materials and providing a foundation for improving the evaluation and design of LIB safety and durability.

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来源期刊
Journal of Materials Chemistry A
Journal of Materials Chemistry A CHEMISTRY, PHYSICAL-ENERGY & FUELS
CiteScore
19.50
自引率
5.00%
发文量
1892
审稿时长
1.5 months
期刊介绍: The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.
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