Issue 8, 2023

SnOxS2−x/GNS nanocomposites for reversible and high-capacity lithium-ion batteries

Abstract

SnO2 and SnS2 anode materials can improve the cycle stability of tin-based electrodes compared with Sn. However, they usually lead to huge initial irreversible capability and lower initial efficiency. To solve these problems, we reported SnOxS2−x/GNS nanocomposites with a large surface area and small particle size, which can improve the kinetics of the electrochemical reactions and realize a reversible Li+ storage process. The obtained SnOxS2−x/GNS nanocomposites (x = 0.3–1.3) have homogenously anchored on graphene nanosheets, which consists of a single phase (SnO2 or SnS2) nanocrystal (3–5 nm) and are surrounded by large amorphous areas. This unique structure makes the Li+ storage process of the obtained nanocomposites fully reversible. Specifically, the SnOS/GNS nanocomposite exhibits a good cycling performance of 1066 mA h g−1 at 0.2 A g−1 after 50 cycles and a rate capability of 402 mA h g−1 at 2 A g−1.

Graphical abstract: SnOxS2−x/GNS nanocomposites for reversible and high-capacity lithium-ion batteries

Supplementary files

Article information

Article type
Paper
Submitted
04 févr. 2023
Accepted
16 mars 2023
First published
29 mars 2023

Sustainable Energy Fuels, 2023,7, 1839-1845

SnOxS2−x/GNS nanocomposites for reversible and high-capacity lithium-ion batteries

K. Yang, C. Yan, X. Liu, Q. Chen, B. Dong, H. Guo and X. Qian, Sustainable Energy Fuels, 2023, 7, 1839 DOI: 10.1039/D3SE00141E

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