期刊
JOURNAL OF POWER SOURCES
卷 195, 期 9, 页码 2924-2927出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2009.11.014
关键词
Composite materials; Conducting polymers; Disulfides; Cathode materials; Lithium-ion battery; Bilayered nanofilm electrodes
资金
- CNPq
Bilayered nanofilm electrodes made of polypyrrole (Ppy) and poly-2,5-dimercapto-1,3,4-thiadiazole (poly-DMcT) are produced by electrochemical means onto a carbon-fiber substrate, with the goal of preventing the loss of the electroactive mass of the disulfide and improving the electrode stability during the charge/discharge cycling process. Lightweight and high surface area composites are obtained by potentiostatically depositing a nanometric layer of Ppy onto a carbon fiber piece already supporting a layer of a potentiodynamically obtained poly(DMcT) film. The growth charge/mass ratio for the bilayered polymeric electrode is optimized, leading to a high electrochemical performance cathode with a stable specific capacity of similar to 320 mA h g(-1) after 100 cycles. (C) 2009 Elsevier B.V. All rights reserved.
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