硫化基全固态电池复合式阴极中的电化学机械合:通路,降解和设计规则
Gawon Song1, Seonghyun Lee1, Minseon Lee1
1School of Chemical and Biological Engineering, Institute of Chemical Processes, Institute of Engineering Research, Seoul National University, Seoul, Republic of Korea.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|February 13, 2026
概括
全固态电池 (ASSB) 提供比离子电池 (LIB) 更高的能量密度和安全性. 本综述详细介绍了机械应力如何破坏ASSB阴极中的离子运输,阻碍性能,并提供改进的设计策略.
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
- 电池技术 电池技术
背景情况:
- 全固态电池 (ASSB) 使用固体电解质,在能量密度和安全方面比传统的离子电池 (LIB) 有潜在的优势.
- 固体电解质的机械刚性引入了与电池运行过程中在接口上的固体-固体接触相关的挑战.
- 了解故障机制对于设计强大可靠的ASSB至关重要.
研究的目的:
- 审查基于硫化物的ASSB中的反应机制和故障途径.
- 在复合材料阴极内绘制关键导电网络的地图,并通过电化学机械过程破坏它们.
- 确定工程策略,以提高ASSB的性能和稳定性.
主要方法:
- 文献综述整合了目前对ASSB反应机制和故障模式的理解.
- 在复合正极中分析CAM内部/CAM间的传输,CAM表面接口和SE粒子传输.
- 检查影响传导网络的电化学机械降解过程.
主要成果:
- 阴极体积的变化和在阴极活性物质 (CAM) 和碳表面上的硫化物固体电解质 (SEs) 的降解有助于接触损失和电阻增长.
- 机械应力对关键导电网络 (CAM内/间,CAM下,SE粒子传输) 的破坏是关键的故障途径.
- 工程策略包括阴极设计,SE接口修改,粒子大小控制和压力管理可以改善应力耐受性和运输共透.
结论:
- 机械应力显著影响离子运输,并导致硫化物基ASSB复合阴极的降解.
- 需要有效的工程策略来维持电子和离子运输通路,以确保ASSB的稳定运行.
- 对于复合材料阴极所讨论的原则适用于安全,高能量密度ASSB的全电池设计和制造.
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