Preparation and electrochemical performance of amorphous carbon coated tin-based anode materials

doi:10.12028/j.issn.2095-4239.2019.0034

Abstract

Abstract: Tin oxides have attracted much attention as a negative material for lithium-ion batteries due to its high theoretical specific capacity and low cost. In this work, taking tin tetrachloride pentahydrate as tin source and graphene oxide (GO)/C₆H₁₂O₆ as carbon source, the composite of SnO₂ dispersed into amorphous carbon has been synthesized by hydrolysis and carbonization in large scale. The composite structure and morphology of the products are characterized, and the electrochemical properties of the product are analyzed by electrochemical tests. SnO₂ nanoparticles are homogeneously dispersed in the matrix of amorphous carbon. After 100 cycles, the discharge capacity of the composite is 541 mA·h·g^-1. Amorphous carbon can effectively suppress the volume change of SnO₂ particles during charging/discharging, and improves the conductivity of the composites and the cyclic stability. It leads to an improved electrochemical properties.

Key words: SnO₂, anode materials, cycling performance, electrochemical performance

CLC Number:

TM912

XU Hui, YANG Liuqing, YIN Fan, YANG Gang. Preparation and electrochemical performance of amorphous carbon coated tin-based anode materials[J]. Energy Storage Science and Technology, 2019, 8(4): 732-737.

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