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

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.

Key words: lithium sulfur battery, cathode material, exfoliated graphite containing sulfur, sulfur, electrochemical performance