Preparation and Electrochemical Performance of a Novel Lithium Battery Cathode Material Polysulfurpolyaniline

Abstract

Abstract: A novel cathode material containing S-S side group on the main polyaniline chain backbone was obtained for lithium secondary battery.Polychloropolyaniline and polysulfurpolyaniline were prepared successively by the reactions of polyaniline with chloride monosulfur catalyzed by AlCl₃ and with Na₂S₅,respectively.The resultants were both analyzed by elemental analysis, IR spectroscopy,X-ray electron spectroscopy(XPS) and SEM.XPS data suggested that electrons were more localized in the monomers of the main polyaniline chain structure of polysulfurpolyaniline.The polyaniline chain structure of polysulfurpolyaniline couldn't effectively catalyze the electrochemical reaction of side group S-S.The charge-discharge profile and the corresponding differential profile indicated that the charge-discharge process maybe contained three successive redox reactions,and there was an obvious discharge voltage plateau at 2.07 V.The discharge specific capacity of polysulfurpolyaniline was in the range of 181-187 mA·h/g and the efficiency was up to 94% for 30 charge-discharge cycles.

Key words: Cathode material, Polychloropolyaniline, Polysulfurpolyaniline, Preparation

CLC Number:

O646

TrendMD:

YUAN Ke-Guo, WANG An-Bang, CAO Gao-Ping, YANG Yu-Sheng . Preparation and Electrochemical Performance of a Novel Lithium Battery Cathode Material Polysulfurpolyaniline[J]. Chem. J. Chinese Universities, 2005, 26(11): 2117.

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Preparation and Electrochemical Performance of a Novel Lithium Battery Cathode Material Polysulfurpolyaniline

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