高等学校化学学报

高等学校化学学报 ›› 2005, Vol. 26 ›› Issue (5): 918.

• 研究论文 • 上一篇    下一篇

锂电池阴极材料多硫代聚苯撑的制备及电化学性能

王维坤, 王安邦, 曹高萍, 杨裕生   

  1. 防化研究院军用化学电源研究与发展中心, 北京100083
  • 收稿日期:2004-05-19 出版日期:2005-05-10 发布日期:2005-05-10
  • 通讯作者: 王维坤(1974年出生),女,助理研究员,从事化学电源的研究.E-mail:wangweikun2002@sohu.com E-mail:wangweikun2002@sohu.com
  • 基金资助:

    国家“八六三”计划项目(批准号:2001AA320301)资助.

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

WANG Wei-Kun, WANG An-Bang, CAO Gao-Ping, YANG Yu-Sheng   

  1. Military Power Sources R & D Center, Chemical Defence Institute, Beijing 100083, China
  • Received:2004-05-19 Online:2005-05-10 Published:2005-05-10

PDF (PC)

被引次数

30

摘要： 采用阴极材料结构改性的新方法,即以导电的聚苯撑作为骨架,将多硫链以侧链形式连接在主链上.通过苯的聚合、聚苯撑氯代,氯代聚苯撑(PPPCl)的硫代三步合成了多硫代聚苯撑(PPPS),产物结构经13CNMR谱、IR光谱、Raman光谱和元素分析进行了鉴定,其中IR谱中461和615cm-1及Raman谱中470和666cm-1峰分别表明存在S—S键和C—S键,结合其它鉴定结果,证明终产物为多硫代聚苯撑.组装成电池进行充放电性能测试表明,材料在80mA/g的电流密度下放电,比容量为987mA·h/g;在400mA/g下放电,比容量为776mA·h/g.在这两种电流密度下的利用率分别为83.5%和65.7%,具有较高的利用率和较好的大电流性能.在400mA/g的电流密度下放电时,经过25个循环的容量为307mA·h/g.

关键词: 多硫代聚苯撑, 阴极材料, 锂电池

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

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