摘要
于1mol/L LiClO4/EC+DEC电解液中添加不同的钾盐可以显著降低天然石墨电极首次循环过程中的不可逆容量损失,提高电极的可逆容量和倍率充放电性能.交流阻抗和电极表面固体电解质相界面(SEI)膜组分的FTIR分析表明,添加一定量的钾盐可以降低SEI膜的锂盐含量,有助于形成Li+迁移性良好的SEI膜.
Addition of different potassium salts into 1mol/L LiClO4/EC+DEC electrolyte can reduce the initial irreversible capacity loss at the first cycle and improve the reversible capacity and the rate capability of a natural graphite anode. Electrochemical impedance spectroscopy (EIS) and FTIR studies demonstrated the formation of a more conductive and thinner SEI layer on the graphite surface in the electrolyte containing a certain amount of potassium salt.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第5期1109-1113,共5页
Journal of Inorganic Materials
基金
河南省杰出青年科学基金(04120001100)
关键词
锂离子蓄电池
天然石墨
电解液
添加剂
lithium-ion battery
natural graphite
electrolyte
additive