One-step uniform rotation solvothermal synthesis of a Li3VO4@rGO anode material with superior cycling and rate performance

Zhihan Kong; Kongjun Zhu; Yu Rao; Penghua Liang; Jiatao Chen; Wei Wang; Chuanxiang Zhang; Jingsong Liu; Kang Yan; Jing Wang

doi:10.1039/D3CE00918A

One-step uniform rotation solvothermal synthesis of a Li₃VO₄@rGO anode material with superior cycling and rate performance†

Zhihan Kong,^ab Kongjun Zhu,

*^a Yu Rao,^ab Penghua Liang,^ab Jiatao Chen,^ab Wei Wang,^b Chuanxiang Zhang,

^c Jingsong Liu,^b Kang Yan^a and Jing Wang

^a

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* Corresponding authors

^a State Key Laboratory of Mechanics and Control for Aerospace Structures, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China
E-mail: kjzhu@nuaa.edu.cn

^b College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, China

^c Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology, Nanjing Institute of Technology, Nanjing 211167, China

Abstract

Given its safer working potential and higher theoretical capacity, Li₃VO₄ has become a potential alternative anode material to graphite. However, the hydrophilicity, low electrical conductivity, and unsatisfactory reaction kinetics of the Li₃VO₄ anode pose a challenge. In this paper, a graphene-wrapped Li₃VO₄@rGO hybrid was prepared using a novel efficient uniform rotation solvothermal (URS) method. Graphene with high electrical conductivity accelerates the reaction kinetics of the anode material to improve its rate performance. The URS method restrains the agglomeration of particles to shorten the diffusion paths of Li⁺. The uniform reaction obtained by this method and the lamellar shape of graphene synergistically enlarge the specific surface area of Li₃VO₄ to supply additional active sites for the extraction/insertion of Li⁺. Therefore, Li₃VO₄@rGO–R exhibits superior cycling performance (249.5 mA h g⁻¹ after 4000 cycles at 5 A g⁻¹) and rate performance (243.3 mA h g⁻¹ at 10 A g⁻¹). This study provides a versatile and efficient method for enhancing the electrochemical performance of anode materials.

CrystEngComm

One-step uniform rotation solvothermal synthesis of a Li₃VO₄@rGO anode material with superior cycling and rate performance†

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One-step uniform rotation solvothermal synthesis of a Li₃VO₄@rGO anode material with superior cycling and rate performance

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