欢迎访问《电化学(中英文)》期刊官方网站,今天是
研究论文

锂硫电池硫膨胀石墨正极材料的电化学性能

  • 苑克国 ,
  • 王维坤 ,
  • 余仲宝 ,
  • 王安邦
展开
  • 防化研究院;

收稿日期: 2009-05-28

  修回日期: 2009-05-28

  网络出版日期: 2009-05-28

Electrochemical Performance of the Exfoliated Graphite Containing Sulfur Cathode Material for Lithium Sulfur Battery

  • YUAN Ke-guo ,
  • WANG Wei-kun ,
  • YU Zhong-bao ,
  • WANG An-bang
Expand
  • (Institute of Chemical Defense,Beijing 100191,China

Received date: 2009-05-28

  Revised date: 2009-05-28

  Online published: 2009-05-28

摘要

应用高温气相扩散沉积法由单质硫制备硫膨胀石墨.该硫膨胀石墨正极可降低反应界面电荷传递阻抗,提高扩散阻抗抑制单质硫或多硫化物在充放电过程的穿梭.其首次放电容量达到972 mAh.g-1,容量保持率为78%,循环效率在80%以上.

本文引用格式

苑克国 , 王维坤 , 余仲宝 , 王安邦 . 锂硫电池硫膨胀石墨正极材料的电化学性能[J]. 电化学, 2009 , 15(2) : 202 -205 . DOI: 10.61558/2993-074X.1980

Abstract

The exfoliated graphite containing sulfur cathode material was prepared by the high temperature sulfur gas diffusion adsorption method.This cathode material could obtain an initial discharge specific capacity 972 mAh·g-1,capacity retention ratio 78% and cycling efficiency above 80%,respectively.The exfoliated graphite containing sulfur cathode could decrease the reaction interphase charge transfer impedance,and restrain the sulfur or polysulfide shuttle phenomenon during the charge-discharge process through improving the diffusion impedance.

参考文献

[1]Mikhaylik Y V,Akridge J R.Lowtemperature perform-ance of Li/S batteries[J].J Electrochem Soc,2003,150:A306. [2]Yamin H,Gorenshtein A,Penciner J,et al.Lithiumsulfur battery oxidation/reduction mechanisms of poly-sulfides in THF solutions[J].J Electrochem Soc,1988,35:1 045. [3]Shim J,Stribel K A,Cairns E J.The lithium/sulfur re-chargeable cell Effects of electrode composition and sol-vent on cell performance[J].J Electrochem Soc,2002,149:A1 321. [4]Mikhaylik Y V,Akridge J R.Polysulfide shuttle studyin the Li/S battery system[J].J Electrochem Soc,2004,151:A1 969. [5]Zhao H,Zhou W,Shen W C,et al.Pore structure ofexfoliated graphite and its varieties of liquid sorption[J].Material Science&Engineering(in Chinese),2002,78:153. [6]Cao C N,Zhang J Q.An introduction to electrochemicalimpedance spectroscopy[M].Beijing:Science Press,2002.92.
文章导航

/