锂空气电池复合电解质电化学性能研究  

Electrochemical performance of composite electrolyte for lithium-air battery

作　　者：蔡克迪[1] 杨蕊[1] 赵雪[1] 肖尧[1] 郎笑石[1] 

机构地区：[1]渤海大学辽宁省超级电容器工程技术研究中心,辽宁锦州121013

出　　处：《电源技术》2017年第6期858-860,866,共4页Chinese Journal of Power Sources

基　　金：国家自然科学基金(21206083);辽宁省"百千万人才工程"资助项目(No.201797)

摘　　要：采用LiPF_6与EC/EMC/DMC作为锂空气电池电解质主体,并分别加入LiTFSI和LiBF_4锂盐制成复合电解质材料,组装成锂空气电池,通过循环伏安、交流阻抗、恒流充放电等方式研究复合电解质的电化学性能。结果表明,LiPF_6+LiBF_4与EC/EMC/DMC体系复合电解质表现出较优的电化学性能,在0.10 mA/cm^2电流密度下电池首次放电比容量为3 163 mAh/g,能量密度7.98 m Wh/cm^2。LiPF6 in EC/EMC/DMC doped with LiTFSI and LiBF4 as a composite electrolyte was designed and fabricated for lithium-air battery, which was studied through the cyclic voltammograms, alternating-current impedance, constant current charge and discharge and so on. Using EC/EMC/DMC as organic solvents with LiPF6, LiPF6-LiTFSI, LiPFs-LiBF4 as solute, the lithium-air battery with LiPF6-LiBF4-EC/EMC/DMC composite electrolyte shows the best performance which has the first discharge specific capacity of 3 163 mAh/g and power density of 7.98 mWh/cm2 at the current density of 0.10 mA/cm^2.

关 键 词：锂空气电池 复合电解质 锂盐 

分 类 号：TM91[电气工程—电力电子与电力传动]