使用差分扫描热量计来评估一组金属固态电池材料的热安全性
Nathan B Johnson1, Bhuvsmita Bhargava1, Jonathan Chang1
1Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20742, United States.
ACS applied materials & interfaces
|November 22, 2023
概括
不同扫描热量计 (DSC) 揭示了电池材料在加热时的反应. 这项研究绘制了用于更安全的离子电池开发的热化学图,确定了关键反应及其热量贡献.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 不同扫描热量计 (DSC) 对于电池开发的早期阶段至关重要.
- 了解反应热化学指导开发更安全的电池化学和组件.
研究的目的:
- 构建和测试Li0.43CoO2 + C + PVDF的微细胞DSC样本,其中包括Li6.4La3Zr1.4Ta0.6O12.
- 量化映射电池电池堆材料的反应热化学反应到500°C.
主要方法:
- 容量匹配的微细胞DSC样品的制造.
- 使用差分扫描热度计进行高达500°C的热量分析.
主要成果:
- ~74%的O2来自Li0.43CoO2与C反应形成CO2,而不是LiO.
- PVDF热解 (>400°C) 释放了HF,该HF与Li发生了外热反应,形成LiF.
- 氧反应 (CO2,Li2O) 贡献了约60%的总热量,高频反应 (LiF) 贡献了约36%.
结论:
- DSC为电池安全评估提供了定量热化学数据.
- 该研究确定了特定的外热反应及其对微细胞整体热释放的贡献.
- 结果指导材料选择和电池设计,以提高电池的安全性.
关键词:
电池安全 电池安全陶制品的陶制品是一种陶.不同扫描热量计差异扫描热量计.电极交叉电流 电极交叉电流 交叉电流有层的金属氧化物.金属金属的使用情况固态状态的固态状态.热 runaway 失控的 热 失控的 热 失控的更多相关视频
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