摘要
在电解液1 mol/L LiPF6/EC+DMC中加入碳酸钠(Na2CO3),通过SEM、循环伏安和电化学阻抗谱分析,研究了Na2CO3对石墨电极的影响。添加饱和Na2CO3,可促进在石墨电极表面形成更稳定的固体电解质相界面(SEI)膜,抑制循环过程中电解液的进一步还原分解,增进Li+嵌脱过程的可逆性,改善石墨电极的电化学性能。
Effects of sodium carbonate( Na2CO3) on graphite electrode were studied through SEM, cyclic voltammetry and elec- trochemical impedance spectroscopy analyses by adding Na2CO3 into electrolyte 1 mol/L LiPF6/EC + DMC. Adding saturated N2CO3 could help to form a more stable solid electrolyte interphase (SEI) film, suppress the decomposition of electrolyte, enhance the reversibility of Li+ insertion and extraction process, improving the electrochemical performance of graphite electrode.
出处
《电池》
CAS
CSCD
北大核心
2012年第3期119-122,共4页
Battery Bimonthly
基金
中央高校基本科研业务费专项资金(2010LKHX03)
中国矿业大学科技攀登计划(ON090237)