材料科学
微型多孔材料
阴极
阳极
涂层
化学工程
聚乙烯醇
电池(电)
锂(药物)
聚合物
烧结
法拉第效率
腐蚀
复合材料
化学
电极
医学
功率(物理)
物理
物理化学
量子力学
工程类
内分泌学
作者
Yingqiang Wu,Mengliu Li,Wandi Wahyudi,Guan Sheng,Xiaohe Miao,Thomas D. Anthopoulos,Kuo‐Wei Huang,Yangxing Li,Zhiping Lai
出处
期刊:ACS omega
[American Chemical Society]
日期:2019-08-19
卷期号:4 (9): 13972-13980
被引量:56
标识
DOI:10.1021/acsomega.9b01706
摘要
A simple and low-cost polymer-aided sol-gel method was developed to prepare γ-Al2O3 protective layers for LiNi0.6Co0.2Mn0.2O2 (NCM622) cathode materials. The selected polyvinyl alcohol polymer additive not only facilitates the formation of a uniform and thin γ-Al2O3 layer on the irregular and rough cathode particle surface to protect it from corrosion but also serves as a pore-forming agent to generate micropores in the film after sintering to allow fast transport of lithium ions, which guaranteed the excellent and stable battery performance at high working voltage. Detailed studies in the full battery mode showed that the leached corrosion species from the cathode had a more profound harmful effect to the graphite anode, which seemed to be the dominating factor that caused the battery performance decay.
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