在全固态电池中分层阴极的化学机械故障的原子起源
Chunyang Wang1,2, Yaqi Jing1, Dong Zhu1
1Department of Physics and Astronomy, University of California Irvine, Irvine, California 92697, United States.
Journal of the American Chemical Society
|June 14, 2024
概括
全固态电池 (ASSB) 面临着独特的分层阴极故障. 先进的显微镜显示表面丧和层间剪切驱动降解,与液离子电池不同.
科学领域:
- 材料科学
- 电化学
- 电池技术
背景情况:
- 全固态电池 (ASSB) 对于下一代储能至关重要,因为它们的安全性得到了提高.
- 了解ASSB中的分层阴极故障机制对于其发展至关重要.
- 目前关于阴极降解的知识主要来自液态电解质离子电池 (LIB).
研究的目的:
- 阐明在ASSB中分层阴极化学降解背后的原子尺度机制.
- 确定ASSB和LIB之间故障模式的关键差异.
- 提供有关降解途径的原子层面见解,以提高ASSB的性能.
主要方法:
- 使用人工智能增强的超分辨率电子显微镜.
- 研究了技术上重要的高层氧化物阴极.
- 在电化学循环过程中分析了原子结构和相变.
主要成果:
- 在ASSB阴极中发现了一种新的"表面丧"现象,涉及纳米结晶和岩盐转化.
- 观察到脱石化诱导的层间剪切导致O1阶段形成和复杂的接口.
- 证明表面挫折和层间剪切的结合显著加剧了化学机械分解.
结论:
- 这项研究揭示了与LIB相比,ASSB层阴极的不同原子级降解机制.
- 表面挫折和层间剪切被确定为ASSB阴极故障的关键因素.
- 这些发现弥补了重要的知识差距,为设计更强大的ASSB提供了途径.
相关概念视频
Batteries and Fuel Cells
27.3K
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
27.3K
Metallic Solids
18.4K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
18.4K
Voltaic/Galvanic Cells
57.0K
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
57.0K


