Electrochemical characteristics of LiMn2O4-polypyrrole composite cathode for lithium polymer batteries

摘要: Abstract A LiMn2O4-PPy composite cathode for lithium polymer battery was developed. We investigated temperature dependence of ionic conductivity PVDF-PC-EC-LiClO4 and PVDF-EC-DEC-LiClO4 electrolytes, AC impedance response charge/discharge characteristics LiMn2O4-PPy/MCMB in PVDF-based electrolyte. The PVDF-PC10EC10LiClO4 PVDF-EC10DEC10LiClO4 with 25 wt.% PVDF electrolyte 2.3 1.8×10−3 S/cm at room temperature. first discharge capacity LiMn2O4 added 15 wt.% SP270 123 mAh/g, while that LiMnO2-PPy 7 wt.% PPy 10 wt.% 135 mAh/g. efficiency above 98% after the 2nd cycle. PPy–10 wt.% showed good cycling.