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首页> 外文期刊>International Journal of Heat and Mass Transfer >Impact of low temperature and charge profile on the aging of lithium-ion battery: Non-invasive and post-mortem analysis
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Impact of low temperature and charge profile on the aging of lithium-ion battery: Non-invasive and post-mortem analysis

机译：低温和电荷谱对锂离子电池老化的影响：非侵入性和验尸分析

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摘要

In this paper, the low temperature performance of lithium-ion batteries under various charge rates ranged from 0.2 C to 1 C were studied. To shed some light on the degradation modes and aging mechanism, non-invasive and post-mortem analysis were adopted. The results reveal that there is a considerable reversible capacity loss and internal resistance increase with the increase in charge rate. Particularly, the relative capacity of 1C charged cell after 150 cycles is below 0.8, indicating the end of life is achieved. In addition, the increased internal resistance will lead to a substantial increase in heat generation rate, which is an important factor to the thermal safety control of battery related to the design of thermal management strategy. Besides the resistance increase, two major degradation modes i.e., loss of lithium inventory and loss of active material are demonstrated according to the differential voltage and incremental capacity analysis. It is found that lithium plating is regarded as the main aging mechanism. The anode material of cycled cell display distinct deterioration even exfoliated from the copper foil upon a macroscopic check, and a thick deposited layer morphology and cracking of the layer is visible from a micro point of view through cell opening. During the low temperature charging, lithium plating could be triggered due to the limitation of charge transfer resulted from high-rate charge as well as the limitation of solid-state diffusion resulted from low temperature. The continuous lithium-consuming during cycling will lead to secondary SEI formation, which may result in dead lithium and stripping, eventually reversible capacity loss.
机译：在本文中，研究了各种电荷率下锂离子电池的低温性能范围为0.2c至1c。在降解模式和老化机制上阐明一些光，采用无侵入性和验尸分析。结果表明，随着电荷率的增加，存在相当多的可逆容量损失和内部电阻。特别地，150次循环后1c带电细胞的相对容量低于0.8，表示终生命结束。此外，增加的内阻将导致发热速率大幅增加，这是与热管理策略设计相关的电池热安全控制的重要因素。除了电阻增加之外，根据差电压和增量容量分析，证明了两个主要的降解模式，即，锂库存和活性材料损失的损失。发现锂电镀被认为是主要的老化机制。循环电池的阳极材料显示在宏观检查时甚至从铜箔中剥离的明显劣化，并且通过电池开口的微观的视点可见厚的沉积层形态和裂缝。在低温充电期间，由于高速率电荷导致的电荷传递的限制以及由低温导致的固态扩散的限制，可以触发锂电镀。循环期间的连续锂耗果将导致次生SEI形成，这可能导致死锂和剥离，最终可逆的容量损失。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2021年第5期|121024.1-121024.10|共10页
  • 作者

    Weixiong Wu; Ruixin Ma; Jizhen Liu; Min Liu; Weiliang Wang; Qian Wang;

  • 作者单位

    Energy and Electricity Research Center Jinan University Zhuhai Guangdong Province 510970 China International Energy College Jinan University Zhuhai Guangdong Province 510970 China;

    Energy and Electricity Research Center Jinan University Zhuhai Guangdong Province 510970 China International Energy College Jinan University Zhuhai Guangdong Province 510970 China;

    Energy and Electricity Research Center Jinan University Zhuhai Guangdong Province 510970 China International Energy College Jinan University Zhuhai Guangdong Province 510970 China;

    Energy and Electricity Research Center Jinan University Zhuhai Guangdong Province 510970 China International Energy College Jinan University Zhuhai Guangdong Province 510970 China;

    Energy and Electricity Research Center Jinan University Zhuhai Guangdong Province 510970 China International Energy College Jinan University Zhuhai Guangdong Province 510970 China;

    Energy and Electricity Research Center Jinan University Zhuhai Guangdong Province 510970 China International Energy College Jinan University Zhuhai Guangdong Province 510970 China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Lithium-ion battery; Low temperature charge; Non-invasive method; Post-mortem analysis; Aging mechanism;

    机译：锂离子电池;低温电荷;非侵入方法;后验尸分析;老化机制;

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