材料科学
阴极
变形(气象学)
相(物质)
扫描电子显微镜
透射电子显微镜
电池(电)
复合材料
纳米技术
化学
量子力学
物理
物理化学
功率(物理)
有机化学
作者
Shamail Ahmed,Kerstin Volz
出处
期刊:Matter
[Elsevier]
日期:2023-06-01
卷期号:6 (6): 1682-1684
被引量:1
标识
DOI:10.1016/j.matt.2023.05.014
摘要
The polycrystalline architecture of Ni-rich cathode materials faces complex stresses during electrochemical cycling. Recently in Matter, Wang et al. discussed different modalities of the O3-O1 phase transformation due to electrochemically induced mechanical deformation using aberration-corrected scanning transmission electron microscopy and applying an artificial-intelligence-assisted super-resolution algorithm. The polycrystalline architecture of Ni-rich cathode materials faces complex stresses during electrochemical cycling. Recently in Matter, Wang et al. discussed different modalities of the O3-O1 phase transformation due to electrochemically induced mechanical deformation using aberration-corrected scanning transmission electron microscopy and applying an artificial-intelligence-assisted super-resolution algorithm. Direct observation of chemomechanical stress-induced phase transformation in high-Ni layered cathodes for lithium-ion batteriesWang et al.MatterFebruary 27, 2023In BriefMechanical degradation and phase transformation are two main causes of the failure of battery cathodes. Aided by deep-learning-aided super-resolution imaging, we discover that severe chemomechanical deformation during battery operation triggers phase transformation and the formation of bending bands and kinks in layered oxide cathodes. The failure mechanism uncovers the connection between mechanical degradation and phase transformation in layered oxides, and it provides useful guidance for the development of advanced layered cathodes for next-generation lithium-ion batteries. Full-Text PDF
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