在全固态离子电池中,Fe2(MoO4) 3的电荷-放电行为的修改
Yuta Kimura1, Shintaro Kobayashi2, Shogo Kawaguchi2
1Institute of Multidisciplinary Research for Advanced Materials, Tohoku University 2-1-1, Katahira, Aoba-Ku Sendai 980-8577 Japan yuta.kimura.b2@tohoku.ac.jp.
RSC advances
|June 10, 2024
概括
用固体电解质固化离子电池 (LIB) 改变了电极材料的行为. 这项研究揭示了全固态LIBs中的压力缩小了两相反应区域,影响了性能.
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
- 固态电池是一种固态电池.
背景情况:
- 全固态离子电池 (ASSLIB) 与传统的LIB相比,提供了更高的安全性和能量密度.
- 电极材料的 (去) 石化机制可以在从液体过渡到固体电解质时发生变化.
- 铁2MoO4) 3 (FMO) 是一个有前途的双相电极材料,其行为在固体电解质中不同.
研究的目的:
- 为了研究FMO薄膜在固体电解质上的 (去) 石化机制.
- 了解电池固化如何影响电极材料特性和电化学行为.
- 为了阐明FMO在ASSLIBs中改变 (放电) 行为的根本原因.
主要方法:
- 操作同步射线X射线衍射 (XRD) 用于研究FMO在固体电解质上的薄膜.
- 在 (去) 石化过程中分析XRD模式的峰值移位和扩大.
- 热力学分析考虑压力诱导的吉布斯自由能量变化.
主要成果:
- 固体电解质的FMO显示了单调的峰值转移和暂时的峰值扩大.
- 在固化电池中观察到一个扩大的固溶液区域和一个更窄的双相区域.
- 改变的行为是热力学驱动的,受化学机械扩张的压力影响.
结论:
- 电池固化显著影响电极材料的特性,特别是反应路径.
- 在ASSLIB中的外部应力可以热力学上缩小像FMO这样的电极材料的两相区域.
- 这些发现对于设计和优化ASSLIBs的电极材料至关重要.
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