| Abstract: | A novel lath‐shaped CuO microassemble consisting of well‐crystalized ultrafine nanocrystals was prepared by an ionothermal method with the assistance of ionic liquids (ILs , 1‐butyl‐3‐methylimidazolium tetrafluoroborate). As anode material of lithium ion batteries, the ILs‐CuO exhibits high specific capacity, durability and good rate performance, superior to bare CuO . At a high current density of 1000 mA •g−1, after 100 cycles, ILs‐CuO still retains a discharge capacity of 483.2 mAh •g−1. The improved electrochemical performances could be ascribed to the unique microscale lath‐shape CuO assembles composed of ultrafine nanostructure. |
