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Construction of Sb2Se3 nanocrystals on Cu2−xSe@C nanosheets for high performance lithium storage.
- Source :
- New Journal of Chemistry; 9/21/2019, Vol. 43 Issue 35, p14066-14073, 8p
- Publication Year :
- 2019
-
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, Cu<subscript>2−x</subscript>Se@C@Sb<subscript>2</subscript>Se<subscript>3</subscript> nanosheets were fabricated through a two step solvothermal procedure with the assistance of glucose. Such a structure can facilitate the migration rate of Li<superscript>+</superscript>, enhance the electrical conductivity, buffer the volume variation and prohibit the aggregation of the electrode. As a result, Cu<subscript>2−x</subscript>Se@C@Sb<subscript>2</subscript>Se<subscript>3</subscript> exhibits good electrochemical performance with a specific capacity of 341 mA h g<superscript>−1</superscript> after 100 cycles at a current density of 100 mA g<superscript>−1</superscript> and 153 mA h g<superscript>−1</superscript> at a rate of 2000 mA g<superscript>−1</superscript>. Such a structural design and synthetic strategy may also be applied to explore other nanocomposites to improve the electrochemical performance. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 43
- Issue :
- 35
- Database :
- Complementary Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 138522227
- Full Text :
- https://doi.org/10.1039/c9nj03795k