کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6602895 | 1424082 | 2018 | 28 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The combined effect of CaF2 coating and La-doping on electrochemical performance of layered lithium-rich cathode material
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This work provides a new strategy for using the combined effect of coating-CaF2 and La-doping to improve the electrochemical performance of lithium-rich layer material. Here, La-doping in metal transition(MT) layer is employed to block the migration channel of TM ions and stabilize the crystal structure, and coating-CaF2 on the surface of lithium-rich layer oxide material is employed to retard the side reaction between active material and electrolyte. Benefiting from the combined effect of coating-CaF2 and La-doping, CaF2 coated Li1.2Mn0.52Ni0.13Co0.13La0.02O2 exhibits excellent cycling performance and voltage stability. CaF2 coated Li1.2Mn0.52Ni0.13Co0.13La0.02O2 delivers the initial discharge capacity of 227.1â¯mAh gâ1 at 0.5â¯C. After 100 cycles, its retention of discharge capacity is 93.9%, and its voltage decay is only 0.203â¯V. This connecting mechanism of coating and doping, which can avoid the insufficient of single coating or single doping, is very helpful to develop effective strategies for the modification of Li-rich oxide materials.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 275, 10 June 2018, Pages 18-24
Journal: Electrochimica Acta - Volume 275, 10 June 2018, Pages 18-24
نویسندگان
Min Li, Yi Zhou, Xiaoyan Wu, Lei Duan, Chunming Zhang, Fang Zhang, Dannong He,