کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7744180 | 1498219 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of precursor phase on the structure and electrochemical properties of Li(Ni0.6Mn0.2Co0.2)O2 cathode materials
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
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چکیده انگلیسی
LiNi0.6Co0.2Mn0.2O2 (NCM622) cathode materials are prepared via sintering the mixtures of (Ni0.6Mn0.2Co0.2)(OH)2 precursor and LiOH. The effects of the β-(Ni0.6Mn0.2Co0.2)(OH)2 content in hydroxide precursor on the structure and electrochemical performance of NCM622 cathode materials are investigated. Among three kinds of cathodes, the cathode material sintered from β-(Ni0.6Mn0.2Co0.2)(OH)2 phase precursor exhibits the excellent layered structure with the highest c/a value. Furthermore, it displays the excellent hexagonal ordering with the lowest ratio of I(006+102)/I(101). With increasing the β-(Ni0.6Mn0.2Co0.2)(OH)2 phase content in precursors, the discharge capacity of NCM622 samples first increases, and then decreases. The cathode material sintered from the mixed phase of α-(Ni0.6Mn0.2Co0.2)(OH)2 and β-(Ni0.6Mn0.2Co0.2)(OH)2 shows the highest discharge capacity of 192.1mAh/g and best rate performance, and then is the best recommendation for a high-power cathode. While the cathode material sintered from single β-(Ni0.6Mn0.2Co0.2)(OH)2 phase shows the best cycle stability and the capacity retention of 91.7% after 100â¯cycles, and then is the best recommendation for a long-life cathode.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 324, 15 October 2018, Pages 49-58
Journal: Solid State Ionics - Volume 324, 15 October 2018, Pages 49-58
نویسندگان
Lipeng Xu, Fei Zhou, Jizhou Kong, Haobin Zhou, Qichang Zhang, Qianzhi Wang, Guozhen Yan,