کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10656883 | 460076 | 2018 | 27 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Improving the cycling stability of Ni-rich cathode materials by fabricating surface rock salt phase
ترجمه فارسی عنوان
بهبود پایداری دوچرخهسواری مواد کاتد غنی از نیکل با ساختن فاز نمک سنگی سطح
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کلمات کلیدی
مواد کاتدی، دوپینگ مو تبدیل فاز، گسترش شبکه، خواص الکتروشیمیایی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
Mo doped Ni-rich LiNi0.8Co0.1Mn0.1O2 cathode materials have been synthesized via coprecipitation followed by high-temperature solid state method. The effect of Mo doping on the structure, morphology, and electrochemical performances of Ni-rich cathode material has been investigated. The results reveal that Mo doping may promote the formation of surface rock salt phase and expand the Li+ diffusion channels for Ni-rich material. Benefit from which, the further transition of layered to rock salt structure during cycling has been alleviated. As a result, the optimal Mo doped material, with 1â¯wt% doping, exhibits enhanced cycling stability with superior electrochemistry performances, that is high reversible capacity of 215.7â¯mAh gâ1 at 0.1C, and 184.1â¯mAh gâ1 at 1C with an excellent 100th capacity retention of 92.4%. Even the cut-off voltage raises to 4.5â¯V, the 100th capacity retention of Mo-doped material still reaches as high as 85.2%. The results indicate that fabricating the Ni-rich materials with a surface rock salt phase is an effective strategy towards better structure stability and electrochemical performances.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 292, 1 December 2018, Pages 217-226
Journal: Electrochimica Acta - Volume 292, 1 December 2018, Pages 217-226
نویسندگان
Yuefeng Su, Yongqing Yang, Lai Chen, Yun Lu, Liying Bao, Gang Chen, Zhiru Yang, Qiyu Zhang, Jing Wang, Renjie Chen, Shi Chen, Feng Wu,