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Preparation of CoO/SnO2@NC/S composite as high-stability cathode material for lithium-sulfur batteries.
- Source :
- International Journal of Minerals, Metallurgy & Materials; Oct2021, Vol. 28 Issue 10, p1647-1655, 9p
- Publication Year :
- 2021
-
Abstract
- To improve the sulfur loading capacity of lithium-sulfur batteries (Li-S batteries) cathode and avoid the inevitable "shuttle effect", hollow N doped carbon coated CoO/SnO<subscript>2</subscript> (CoO/SnO<subscript>2</subscript>@NC) composite has been designed and prepared by a hydrothermal-calcination method. The specific surface area of CoO/SnO<subscript>2</subscript>@NC composite is 85.464 m<superscript>2</superscript>·g<superscript>−1</superscript>, and the pore volume is 0.1189 cm<superscript>3</superscript>·g<superscript>−1</superscript>. The hollow core-shell structure as a carrier has a sulfur loading amount of 66.10%. The initial specific capacity of the assembled Li-S batteries is 395.7 mAh·g<superscript>−1</superscript> at 0.2 C, which maintains 302.7 mAh·g<superscript>−1</superscript> after 400 cycles. When the rate increases to 2.5 C, the specific capacity still has 221.2 mAh·g<superscript>−1</superscript>. The excellent lithium storage performance is attributed to the core-shell structure with high specific surface area and porosity. This structure effectively increases the sulfur loading, enhances the chemical adsorption of lithium polysulfides, and reduces direct contact between CoO/SnO<subscript>2</subscript> and the electrolyte. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 16744799
- Volume :
- 28
- Issue :
- 10
- Database :
- Complementary Index
- Journal :
- International Journal of Minerals, Metallurgy & Materials
- Publication Type :
- Academic Journal
- Accession number :
- 152852677
- Full Text :
- https://doi.org/10.1007/s12613-021-2315-1