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Construction of Sb2Se3 nanocrystals on Cu2−xSe@C nanosheets for high performance lithium storage

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Abstract

Copper selenide as an anode for lithium-ion batteries suffers from volume expansion/contraction, while constructing nanostructured copper selenide with other components is considered as an effective strategy. In this work, Cu2−xSe@C@Sb2Se3 nanosheets were fabricated through a two step solvothermal procedure with the assistance of glucose. Such a structure can facilitate the migration rate of Li+, enhance the electrical conductivity, buffer the volume variation and prohibit the aggregation of the electrode. As a result, Cu2−xSe@C@Sb2Se3 exhibits good electrochemical performance with a specific capacity of 341 mA h g−1 after 100 cycles at a current density of 100 mA g−1 and 153 mA h g−1 at a rate of 2000 mA g−1. Such a structural design and synthetic strategy may also be applied to explore other nanocomposites to improve the electrochemical performance.

Graphical abstract: Construction of Sb2Se3 nanocrystals on Cu2−xSe@C nanosheets for high performance lithium storage

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Publication details

The article was received on 22 Jul 2019, accepted on 12 Aug 2019 and first published on 13 Aug 2019


Article type: Paper
DOI: 10.1039/C9NJ03795K
New J. Chem., 2019, Advance Article

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    Construction of Sb2Se3 nanocrystals on Cu2−xSe@C nanosheets for high performance lithium storage

    H. Yue, Q. Tian, G. Wang, R. Jin, Q. Wang and S. Gao, New J. Chem., 2019, Advance Article , DOI: 10.1039/C9NJ03795K

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