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

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 conducti...

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Bibliographic Details
Published in:Journal of the Electrochemical Society 2019, Vol.166 (6), p.A1038-A1044
Main Authors: He, Xiaoshu, Han, Guokang, Lou, Shuaifeng, Du, Lei, Xu, Xing, Du, Chunyu, Cheng, Xinqun, Zuo, Pengjian, Ma, Yulin, Huo, Hua, Yin, Geping
Format: Article
Language:English
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Summary: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.
ISSN:1945-7111
DOI:10.1149/2.0541906jes