期刊
JOURNAL OF POWER SOURCES
卷 196, 期 16, 页码 6951-6955出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2010.11.132
关键词
Sulfur; Tubular polypyrrole; Lithium-sulfur battery; Composite cathode
资金
- NSFC [50730001, 50973127]
- Chinese Science and Technology Ministry [2007BAA07B01, 2007CB209700]
- Science and Technology Commission of Shanghai Municipality [08DZ2210900, 09PJ1410800]
A tubular polypyrrole (T-PPy) fiber is synthesized as a conductive matrix for the cathode of lithium-sulfur secondary battery. The sublimed sulfur is incorporated with the T-PPy by a co-heating process. The location and the content of sulfur show a significant effect on the electrochemical behavior of the composite. A reversible capacity of ca. 650 mAh g(-1) is maintained for over 80 cycles for the S/T-PPy composite with 30 wt.% sulfur. The enhanced conductivity, the favorable distribution of the nano-sized sulfur in the T-PPy and the stable retention of polysulfides lead to the improvement of the cycling stability of the sulfur based electrode. (C) 2010 Elsevier B.V. All rights reserved.
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