Lithium vanadate nanowires@reduced graphene oxide nanocomposites on titanium foil with super high capacities for lithium-ion batteries

Yunhe Cao; Danyang Chai; Zhiping Luo; Ming Jiang; Weilin Xu; Chuanxi Xiong; Shan Li; Hui Liu; Dong Fang

doi:10.1016/j.jcis.2017.03.002

Lithium vanadate nanowires@reduced graphene oxide nanocomposites on titanium foil with super high capacities for lithium-ion batteries

J Colloid Interface Sci. 2017 Jul 15:498:210-216. doi: 10.1016/j.jcis.2017.03.002. Epub 2017 Mar 2.

Authors

Yunhe Cao¹, Danyang Chai¹, Zhiping Luo², Ming Jiang¹, Weilin Xu¹, Chuanxi Xiong¹, Shan Li³, Hui Liu⁴, Dong Fang⁵

Affiliations

¹ Key Lab of Green Processing and Functional Textiles of New Textile Materials, Ministry of Education, College of Material Science and Engineering, Wuhan Textile University, Wuhan 430200, PR China.
² Department of Chemistry and Physics, Fayetteville State University, Fayetteville, NC 28301, USA.
³ Information and Engineering School, Wuchang University of Technology, Wuhan 430223, PR China.
⁴ School of Metallurgy and Environment, Central South University, Changsha 410083, PR China.
⁵ Key Lab of Green Processing and Functional Textiles of New Textile Materials, Ministry of Education, College of Material Science and Engineering, Wuhan Textile University, Wuhan 430200, PR China. Electronic address: csufangdong@gmail.com.

PMID: 28324727
DOI: 10.1016/j.jcis.2017.03.002

Abstract

With a theoretically high capacity and suitable discharge/charge plateaus, lithium vanadates (such as Li_0.04V₂O₅) can be used as cathode material for lithium ion batteries. Herein, Li_0.04V₂O₅ nanowires are densely anchored onto reduced graphene oxide (rGO) nanosheets to form a Li_0.04V₂O₅@rGO nanocomposite by a hydrothermal method with subsequent thermal treatment. Due to this unique structure, the Li_0.04V₂O₅@rGO exhibits remarkable rate performance and excellent cycling stability. Specifically, it delivers a reversible discharge capacity of 738.09mAhg^-1 at a current density of 100mAg^-1 in the voltage range of 2.0-4.0V. After 500 cycles, it still maintains a high capacity of 731.70mAhg^-1, which represents 95.01% retention of the original reversible capacity. These results indicate that the Li_0.04V₂O₅@rGO could be a promising candidate as cathode active material for long-term cycling performance in lithium-ion batteries.

Keywords: Lithium ion battery; Lithium vanadate; Nanocomposite; Reduced graphene oxide.