PDF/月刊誌論文/code:pg_1104_31 マテリアル インテグレーション 2011年4月号
MATERIALS INTEGRATION 地域と世界に貢献する東北大学多元物質科学研究所(4,5月合併号)

ナノマテリアルを用いた高容量・高出力型リチウム電池の電極開発
■著者
東北大学多元物質科学研究所 サステナブル理工学研究センター　エネルギーデバイス化学研究分野 本間 格

■要約
The increasing effort has been devoted to develop an advanced secondary battery to realize more efficient as well as low/zero emission vehicles such as electric/hybrid cars. This paper reports our recent investigations for applying nanomaterials to design high power/high density lithium ion secondary batteries. The solution processing has been successfully employed to synthesize nano-sized electrodes such as LiCoO2 and LiMn2O4 and the superior power/energy density were achieved due to the nano-size effects of the electrochemical properties. The 9nm sized LiCoO2 electrodes can be charged/discharged under 100C rate by their short diffusion length of the Li+, however, the 43nm sized LiMn2O4 show two electron capacity up to 250mAh/g due to the reversible phase transformation to a tetragonal phase Li2Mn2O4.