A Facile Microwave Hydrothermal Method for Fabricating SnO2@C/Graphene Composite With Enhanced Lithium Ion Storage Properties

Li-Lai Liu; Ming-Yang Li; Yi-Han Sun; Xue-Ying Yang; Min-Xuan Ma; Hui Wang; Mao-Zhong An

doi:10.3389/fchem.2022.895749

A Facile Microwave Hydrothermal Method for Fabricating SnO₂@C/Graphene Composite With Enhanced Lithium Ion Storage Properties

Front Chem. 2022 Jun 1:10:895749. doi: 10.3389/fchem.2022.895749. eCollection 2022.

Authors

Li-Lai Liu^{1

2

3}, Ming-Yang Li¹, Yi-Han Sun¹, Xue-Ying Yang¹, Min-Xuan Ma¹, Hui Wang¹, Mao-Zhong An²

Affiliations

¹ College of Environmental and Chemical Engineering, Heilongjiang University of Science and Technology, Harbin, China.
² School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin, China.
³ Baotailong New Materials Co.,Ltd., Jixi, China.

Abstract

SnO₂@C/graphene ternary composite material has been prepared via a double-layer modified strategy of carbon layer and graphene sheets. The size, dispersity, and coating layer of SnO₂@C are uniform. The SnO₂@C/graphene has a typical porous structure. The discharge and charge capacities of the initial cycle for SnO₂@C/graphene are 2,210 mAh g^-1 and 1,285 mAh g^-1, respectively, at a current density of 1,000 mA g^-1. The Coulombic efficiency is 58.60%. The reversible specific capacity of the SnO₂@C/graphene anode is 955 mAh g^-1 after 300 cycles. The average reversible specific capacity still maintains 572 mAh g^-1 even at the high current density of 5 A g^-1. In addition, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) are performed to further investigate the prepared SnO₂@C/graphene composite material by a microwave hydrothermal method. As a result, SnO₂@C/graphene has demonstrated a better electrochemical performance.

Keywords: SnO2@C/graphene; electrochemical performance; lithium-ion batteries; microwave hydrothermal; porous structure.