Controlled synthesis of porous Co-Mn nanosheet composite with high performance for lithium-ion battery

Abstract

Controllable porous Co-Mn nanosheet composites are prepared via a solvothermal method. The effect of Co/Mn ratio on the crystal structure, morphology and electrochemical performances is investigated. Optimal porous Co-Mn nanosheet composite exhibits highest reversible capacity of 1248 mAh g−1 for the 100th cycle at 400 mA g−1 and 1371 mAh g−1 for the 400th cycle at 500 mA g−1. Even at a high rate of 10 A g−1, its specific capacity still keeps as high as 650 mAh g−1. The facile synthesis, high specific capacity and excellent rate performance of porous Co-Mn nanosheet composites enable them promising for next generation high-performance lithium ion batteries.