PEO-BASED GEL POLYMER ELECTROLYTES WITH IONIC LIQUID FOR LITHIUM SULFUR BATTERIES
The hydrophobic ionic liquid N-methyl-N-butyl-piperidinium bis (trifluoromethanesulfonyl) imide (PP14TFSI) is incorporated in P(EO)18LiTFSI polymer electrolyte and used as the electrolyte in lithium sulfur batteries. The thermal behavior and ionic conductivity of the P(EO)18LiTFSI-n PP14TFSI (n=PP14 +/Li+mole fraction) is investigated. It is demonstrated that the ionic conductivity of the electrolyte with the PP14 +/Li+ mole fraction up to 2 reaches 10-3Scm-1 at 60℃. On the basis of the Electrochemical impedance spectroscopy (EIS) results, the improved interfacial properties of Li/polymer electrolytes can be explained as the effects of the addition of PP14TFSI. The sulfur cathode achieves an initial discharge capacity as high as 1410mAhg-1 at the current density of 0.1mAcm-2 by using the P(EO)18LiTFSI-2.0 PP14TFSI electrolyte and maintain a reversible capacity of 400mAhg-1 after 40th cycles at 1mAcm-2 70℃.
JUN JIN ZHAOYIN WEN YU LIU
CAS Key Laboratory of Materials for Energy Conversion,Shanghai Institute of Ceramics, Chinese Academ CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Acade
国际会议
The 12th Asian Conference on Solid State Ionics(第十二届亚洲固态离子学会议暨第十五届中国固态离子学会议)
武汉
英文
78-86
2010-05-02（万方平台首次上网日期，不代表论文的发表时间）