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TiO2 microbox/carbon nanotube composite-modified separator for high-performance lithium-sulfur batteries.
- Source :
- Journal of Solid State Electrochemistry; Mar2021, Vol. 25 Issue 3, p949-961, 13p
- Publication Year :
- 2021
-
Abstract
- Mesoporous hollow TiO<subscript>2</subscript> microboxes are synthesized by a two-step solvothermal method via CaTiO<subscript>3</subscript> intermediate. Composite consisting of TiO<subscript>2</subscript> microboxes and carbon nanotubes (CNT) is applied as a coating layer on conventional polymer separator for lithium-sulfur batteries. The cell using a modified separator exhibits enhanced cycling performance and rate capability. A discharge capacity of 852.3 mAh g<superscript>−1</superscript> is achieved at 0.2 C after 200 cycles and more than 500 mAh g<superscript>−1</superscript> of discharge capacity could be retained after 1000 cycles at 1 C, much better than the cells employing untreated or sole CNT-coated separator. Even at a high C-rate of 10 C, the cell with CNT-TiO<subscript>2</subscript>-coated separator could deliver a high specific discharge capacity of 561 mAh g<superscript>−1</superscript>. Such enhanced electrochemical performance is ascribed to the synergistic effect of CNT and TiO<subscript>2</subscript> on suppressing shuttle reactions of lithium polysulfides. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14328488
- Volume :
- 25
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Journal of Solid State Electrochemistry
- Publication Type :
- Academic Journal
- Accession number :
- 148784204
- Full Text :
- https://doi.org/10.1007/s10008-020-04870-1