扫描电子显微镜
电极
材料科学
微晶
单晶
锂(药物)
Crystal(编程语言)
显微镜
化学工程
复合材料
分析化学(期刊)
结晶学
化学
冶金
光学
物理
程序设计语言
计算机科学
物理化学
内分泌学
工程类
医学
色谱法
作者
Yulong Liu,Jessie Harlow,J. R. Dahn
标识
DOI:10.1149/1945-7111/ab6288
摘要
Single crystal LiNi 0.5 Mn 0.3 Co 0.2 O 2 (SC532), LiNi 0.6 Mn 0.2 Co 0.2 O 2 (SC622) and LiNi 0.8 Mn 0.1 Co 0.1 O 2 (SC811) electrodes were retrieved from heavily cycled commercial-grade pouch cells at 4.3 V for cross-section scanning electron microscopy (SEM). SEM images indicated the single crystals showed very little microcracking, thought by many researchers to be one of the main reasons for cell degradation when polycrystalline materials are used. SEM images of electrodes from heavily cycled cells were compared to those from fresh cells which showed little visual difference. Parallel microcracks within very few single crystal particles were observed for both fresh and heavily cycled materials and are thought to be caused during the electrode calendaring process. It is believed by the authors that single crystal materials are highly promising positive electrode materials for high energy density and long cycle life lithium-ion cells.
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