Aniline‐Based Disulfide/Aniline Copolymers as a High Energy‐Storage Material

Abstract

Aniline‐based disulfide, 5‐amino‐1,4‐dihydrobenzo[d]‐1′,2′‐dithiadiene (DTAn), was synthesized through a new route. The DTAn/aniline copolymers [P(DTAn‐co‐An)] were prepared by chemical oxidative polymerization. The results show that the polymerization activity of the DTAn is obviously lower than that of aniline, and the degree of polymerization increases with the increasing feed ratio of aniline and oxidant dosage. The cyclic voltammograms of the copolymers indicate that intramolecular self‐catalyzed effects occurred between the conducting backbone and the S‐S side chain. The charge–discharge tests of Li/P(DTAn‐co‐An) cell show an initial specific capacity of 262 mAh · g−1, which suggests that P(DTAn‐co‐An) may be a promising cathode material in secondary lithium batteries.

Polymer-Based Organic Batteries

“…Although the discharge curve was strongly sloping, a small plateau, attributed to the reversible oxidation/ reduction of the disulfide bonds, was observed. 184 The conductive backbone is considered to function as an electrocatalyst, improving the redox reaction rate. Nevertheless, the copolymer proved to possess inferior conductivity with respect to the poly(aniline) homopolymer since the extent of the conjugated system of the backbone is limited.…”

“…A copolymer of 5-amino-1,4-dihydrobenzo­[d]-1′,2′-dithiadiene and aniline revealed the hybrid properties of a redox and a conductive polymer. Although the discharge curve was strongly sloping, a small plateau, attributed to the reversible oxidation/reduction of the disulfide bonds, was observed . The conductive backbone is considered to function as an electrocatalyst, improving the redox reaction rate.…”

Tunable Conducting Polymers: Toward Sustainable and Versatile Batteries

“…A capacity of 270 mAh g –1 coupled with a flat voltage of 2.5 V vs Li/Li + was achieved using a gel polymer electrolyte. This PANI-based CRP showed a conductivity in the level of 10 –2 S cm –1 , 2 orders of magnitude lower than that 0.1–5 S cm –1 for PANI; , as a result of the steric hindrance induced by the sulfide substitution for reduced structural order of polymers. Notably, a conducting PANI derivative containing −O–S–S–O– links exhibited a high energy density (460 mWh g –1 ) .…”

Electrochemically active copolymers prepared from elemental sulfur and bis(alkenyl) compounds having crown ether unit

“…The enclosed small sulfur particles or micrometer-sized sulfur wires with carbon materials [20,21,24] or conductive polymers [25][26][27][28][29] have been reported. Polymer compounds which have redox active sulfide structure such as disulfide have been prepared and their electrochemical properties and application to battery systems have been also investigated [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. A few polymer compounds with oligo-sulfide chains (-S n -, n > 2) have been prepared.…”