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.
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.
出处
《电化学》
CAS
CSCD
北大核心
2009年第2期202-205,共4页
Journal of Electrochemistry
基金
国家863项目(2007AA03Z223)资助
关键词
锂硫电池
正极材料
含硫膨胀石墨
单质硫
电化学性能
lithium sulfur battery
cathode material
exfoliated graphite containing sulfur
sulfur
electrochemical performance
