Poly[bis(2-aminophenyloxy)disulfide]: A polyaniline derivative containing disulfide bonds as a cathode material for lithium battery

• Published in: Polymer (Guilford) 2007-01, Vol.48 (1), p.165-173
• Main Authors: Su, Yu-Zhi, Dong, Wen, Zhang, Jian-Hua, Song, Jian-Hua, Zhang, Yong-Hua, Gong, Ke-Cheng
• Format: Article
• Language: English
• Subjects: Applied sciences; Conducting polymer; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Exact sciences and technology; Organic polymers; Organodisulfide; Physicochemistry of polymers; Poly[bis(2-aminophenyloxy)disulfide]; Polymers with particular properties; Preparation, kinetics, thermodynamics, mechanism and catalysts
• ISSN: 0032-3861; 1873-2291
• DOI: 10.1016/j.polymer.2006.10.044

A new conductive polyaniline derivative containing disulfide bonds, poly[bis(2-aminophenyloxy)disulfide] (PAPOD), has been proposed as a high energy-storage material. PAPOD has been synthesized using a moderate oxidant ferric chloride and characterized by elemental analysis, X-ray photoelectron spectroscopy (XPS), FT-IR, FT-Raman, and UV–vis spectroscopy. The cyclic voltammograms of this polymer show that the intramolecular self-catalysis occurs between the conductive main-chain polyaniline (doping/undoping processes of the π-conjugated system) and side-chain disulfide bonds (scission/reformation processes of the S–S bonds) in PAPOD. Because the redox reaction of conductive main-chain polyaniline occurs in the same potential range as that of the side-chain disulfide bonds of this polymer, the Li/PAPOD test cell displays a charge capacity of 230mAhg−1-cathode and an energy density of 460mWhg−1-cathode, which is about 2–3 times higher than those of inorganic intercalation compounds.