Improved Electrochemical Performance of LiNi0.8Co0.15Al0.05O2 Cathode Material by Coating of Graphene Nanodots. Issue 6 (1st January 2019)

• Record Type: Journal Article
• Authors: He, Xiaoshu; Han, Guokang; Lou, Shuaifeng; Du, Lei; Xu, Xing; Du, Chunyu; Cheng, Xinqun; Zuo, Pengjian; Ma, Yulin; Huo, Hua; Yin, Geping
• Is Part Of: Journal of the Electrochemical Society. Volume 166:Issue 6(2019)
• Page Start: A1038
• Page End: A1044
• Publication Date: 2019-01-01
• Subjects: Batteries - Lithium -- Graphene coating -- LiNi0.8Co0.15Al0.05O2 -- Lithium-ion battery; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0541906jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : LiNi0.8 Co0.15 Al0.05 O2 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 LiNi0.8 Co0.15 Al0.05 O2 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 LiNi0.8 Co0.15 Al0.05 O2 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.