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Author Kong, Long ♦ Handa, Yusuke ♦ Taniguchi, Izumi
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ CARBON ♦ CATHODES ♦ CERAMICS ♦ COMPOSITE MATERIALS ♦ ELECTROCHEMISTRY ♦ IMPEDANCE ♦ LITHIUM ♦ LITHIUM-SULFUR BATTERIES ♦ MICROSTRUCTURE ♦ SPECTROSCOPY ♦ SULFUR ♦ SYNTHESIS ♦ VANADIUM ♦ VANADIUM OXIDES ♦ X-RAY DIFFRACTION
Abstract Highlights: • A wet ball milling was conducted to synthesis S–C–V{sub 2}O{sub 5} composite electrode. • V{sub 2}O{sub 5} additive led to further improve electrochemical performance of S-cathode. • S–C–V{sub 2}O{sub 5} composite electrode exhibited a first discharge capacity of 951 mAh g{sup −1}. • The electrode (60 wt.%—S, 30 wt.%—V{sub 2}O{sub 5}, 10 wt.%—C) showed best battery performance. - Abstract: Sulfur (S)–carbon (C)–vanadium pentoxide (V{sub 2}O{sub 5}) composites were prepared by wet ball milling, and their physical and electrochemical properties were evaluated. Firstly, the effect of the carbon content of S–C composite electrodes on their physical and electrochemical properties was investigated. The S–C composite electrode with 60 wt.% S delivers a first discharge capacity of 1077 mAh g{sup −1}. However, its capacity markedly decreases to 606 mAh g{sup −1} after 10 cycles, which corresponds to a capacity fading rate of 47 mAh g{sup −1} per cycle. To improve the electrochemical performance of the S–C composite electrode, carbon was partially replaced by V{sub 2}O{sub 5}. The S–C–V{sub 2}O{sub 5} composite electrode with a composition of 60 wt.%—S, 30 wt.%—V{sub 2}O{sub 5} and 10 wt.%—C exhibits a lower capacity fading rate of 23 mAh g{sup −1} per cycle in the first 10 cycles and better capacity retention than the S–C composite electrode over 50 cycles.
ISSN 00255408
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-01-15
Publisher Place United States
Journal Materials Research Bulletin
Volume Number 73


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