以多壁碳纳米管(Multi-walled carbon nanotubes,MWCNTs)为主要添加相,协同超导乙炔炭黑(SP),对锰酸锂进行电化学改性.对MWCNTs进行预处理,采用扫描电子显微镜观察MWCNTs的微观形貌.掺杂不同质量比的导电剂,制成电池并以恒流充放电方法测试其电化学性能.结果表明,碳包覆后电池的初始充放电比容量都有所下降,掺入1％(质量分数,下同)MWCNTs后的LiMn2O4的首次充放电效率为96.51％,不可逆容量最小,初始放电比容量为116.42 mAh/g,经20次循环后容量保持率仍达962％,使用复合碳源掺杂时,当m(MWCNTs)∶m(SP)=1:2时,首次充放电效率达96.67％,不可逆容量最小,初始放电比容量为119.37 mAh/g,且掺杂2％MWCNTs的效果要略好于掺入2％ SP.
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