Frontiers in Chemistry (Jun 2022)

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

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

DOI
https://doi.org/10.3389/fchem.2022.895749
Journal volume & issue
Vol. 10

Abstract

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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.

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