Improved Electrochemical Performance of LiNi0.8Co0.15Al0.05O2 Cathode Material by Coating of Graphene Nanodots

被引：24
|
作者：
He, Xiaoshu [1 ,2 ]
Han, Guokang [1 ,2 ]
Lou, Shuaifeng [1 ,2 ]
Du, Lei [1 ,2 ]
Xu, Xing [1 ,2 ]
Du, Chunyu [1 ,2 ]
Cheng, Xinqun [1 ,2 ]
Zuo, Pengjian [1 ,2 ]
Ma, Yulin [1 ,2 ]
Huo, Hua [1 ,2 ]
Yin, Geping [1 ,2 ]
机构：
[1] Harbin Inst Technol, Sch Chem & Chem Engn, MIIT Key Lab Crit Mat Technol New Energy Convers, Harbin 150001, Heilongjiang, Peoples R China
[2] Harbin Inst Technol, Sch Chem & Chem Engn, Inst Adv Chem Power Sources, Harbin 150001, Heilongjiang, Peoples R China
来源：
JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2019年 / 166卷 / 06期
关键词：
LITHIUM ION BATTERY; CO-DOPED GRAPHENE; COATED LINI0.8CO0.15AL0.05O2; QUANTUM DOTS; OXIDE; NANOPARTICLES; NANOSHEETS; NITROGEN; SUPPORT; STORAGE;
D O I：
10.1149/2.0541906jes
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
LiNi0.8Co0.15Al0.05O2 cathode material coated with graphene nanodots (GNDs) is designed for the first time to enhance the electrochemical performance. The uniform distribution of GNDs with the size of 5 nm on the LiNi0.8Co0.15Al0.05O2 particle surface can dramatically improve the electronic conductivity. Furthermore, the moderate GNDs coating can provide abundant lithium-ion transportation pathways for the enhanced rate performance. As a result, the GNDs-coated LiNi0.8Co0.15Al0.05O2 with 0.5 wt% coating amount exhibits a high discharge capacity of 150 mAh g(-1) at the high rate of 5 C. The novel GNDs coating proposed in this study provides a new strategy to improve the power and energy density for lithium-ion batteries. (C) 2019 The Electrochemical Society.
引用
收藏
页码：A1038 / A1044
页数：7
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