Synthesis and Electrochemical Performance of Anodic Material Poly(p-phenylene) Polysulfide for Lithium Battery

Abstract

Abstract: In order to minimize the electrically nonconductive nature and capacity fade during cycling of sulfur in the anodic material of lithium batteries, a new method for modifying its structure was proposed in this paper. Poly(p-phenylene) polysulfides (PPPS) were synthesized whose skeleton was conducting poly(p-phenylene)(PPP) with polysulfur side lines attaching to it by chlorination of PPP and subsequent sulfuration of poly(p-phenylene) chloride(PPPCl). The resulted products were characterized by ¹³C NMR, IR spectrum, Raman spectrum and element analysis. The IR data of 461, 615 cm^-1 and Raman data of 470 and 666 cm^-1 suggested the existence of C—S and S—S bonds, which belong to the desired product PPPS. The electrochemical behavior of this material exhibited a high capacity of 987 mA·h/g at 80 mA/g and 776 mA·h/g at 400 mA/g, and its utilization efficiency was 83.5% and 66.7% respectively at the two current densities. The material also showed a stable reversible capacity of 307 mA·h/g after 25 cycles.

Key words: Poly(p-phenylene) polysulfide, Anode material, Lithium battery

CLC Number:

O646

TrendMD:

WANG Wei-Kun, WANG An-Bang, CAO Gao-Ping, YANG Yu-Sheng . Synthesis and Electrochemical Performance of Anodic Material Poly(p-phenylene) Polysulfide for Lithium Battery[J]. Chem. J. Chinese Universities, 2005, 26(5): 918.

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Synthesis and Electrochemical Performance of Anodic Material Poly(p-phenylene) Polysulfide for Lithium Battery

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