ポリアニリン被覆スピネルLiMn₂O₄の充放電挙動

抄録

Electrochemical behavior of polyaniline coated spinel LiMn₂O₄ has been studied to improve the cycling performance of LiMn₂O₄ at 50°C. The polyaniline coated LiMn₂O₄ electrode shows more excellent cycling performance than polyaniline-LiMn₂O₄ mixture electrode, in which the capacity of LiMn₂O₄ decreases and that of polyaniline keeps constant value during the cycling. This result indicates polyaniline coating for LiMn₂O₄ is effective to improve the cycling performance of LiMn₂O₄. Further, 5 wt% polyaniline coating is enough high to improve the cycling performance. This would be due to the coverage of spinel LiMn₂O₄ with polyaniline, which protects the dissolution of manganese by separating spinel LiMn₂O₄ from the electrolyte. It is also confirmed that polyaniline itself shows excellent cycling performance in 4 V region.