Ultrathin Spinel LiMn₂O₄ Nanowires as High Power Cathode Materials for Li-Ion Batteries

Abstract

Ultrathin LiMn₂O₄ nanowires with cubic spinel structure were synthesized by using a solvothermal reaction to produce α-MnO₂ nanowire followed by solid-state lithiation. LiMn₂O₄ nanowires have diameters less than 10 nm and lengths of several micrometers. Galvanostatic battery testing showed that LiMn₂O₄ nanowires deliver 100 and 78 mAh/g at very high rate (60C and 150C, respectively) in a larger potential window with very good capacity retention and outstanding structural stability. Such performances are due to both the favorable morphology and the high crystallinity of nanowires.