期刊
JOURNAL OF POWER SOURCES
卷 196, 期 7, 页码 3655-3658出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2010.12.052
关键词
Sulfur composite cathode; Mesoporous carbon sphere; Lithium sulfur battery
资金
- NSFC [50730001]
- Chinese Science and Technology Ministry [2007BAA07B01, 2007CB209700]
- Science and Technology Commission of Shanghai Municipality [08DZ2210900, 09PJ1410800]
A mesoporous carbon sphere with the uniform channels (OMC) is employed as the conductive matrix in the sulfur cathode for the lithium sulfur battery based on all-solid-state PEO18Li(CF3SO2)(2)N-10 wt%SiO2 electrolyte. Cyclic voltammograms (CV) and electrochemical impedance spectrum (EIS) suggest that the electrochemical stability of the S-OMCs is obviously superior to the pristine sulfur cathode. The S-OMCs composite shows excellent cycling performance with a reversible discharge capacity of about 800 mAhg(-1) after 25 cycles. This would be attributed to an appropriate conductive structure in which the active sulfur is highly dispersed in and contacted with the OMCs matrix. (C) 2010 Elsevier B.V. All rights reserved.
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