在石榴石固体电解质中注射离子诱导的树突形成的特定能量波段
Yongli Song1, Chao Xin2, Qinghe Zhao3
1School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013 People's Republic of China.
The journal of physical chemistry letters
|June 14, 2024
概括
固态电池中的树形成是一个由低电位驱动的物理电化学过程. 使用具有更高工作电压的阳极可以有效地防止充电期间的树生长.
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 固态电池是什么
背景情况:
- 在固态电池的开发中,树的形成是一个关键的挑战.
- 了解底层机制对于提高电池安全性和性能至关重要.
研究的目的:
- 为了研究在固体电解质中树形成的物理电化学过程.
- 确定促进或抑制树生长的条件和因素.
主要方法:
- 对涉及注射离子和电子载体的物理电化学反应过程的分析.
- 对于注射的离子,确定一个独特的能量频段.
- 量化确定阳极工作电压对树突形成的影响.
主要成果:
- 树的生长是一种物理电化学过程,需要低电化学潜力.
- 导电带底部注入的离子的特定能量带在被电子载体所占据时,有助于形成状物.
- 具有较高工作电压 (>0.2V与Li/Li+) 的阳极有效抑制了树岩的形成.
- 树石的形成仅发生在充电 (涂层) 过程中,在减电潜力下的混合导电粒边界上.
结论:
- 拟议的模型阐明了在固体电解质中树形成的机制.
- 采用高压阳极是一种可行的策略,以防止固态电池中的状物问题.
- 这项研究对推进电池技术具有重大科学和实际价值.
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