Hierarchical hollow microflowers constructed from mesoporobs single crystalline CoMn2O4 nanosheets for high performance anode of lithium ion battery

Hierarchical hollow microflowers constructed from mesoporous single crystalline CoMn2O4 nanosheets were synthesized by a solvothermal route followed by calcination in air. It was found that the amount of deionized water plays a key role in the formation of the well-defined hierarchical hollow structure. A possible formation mechanism of the hierarchical hollow microflowers is proposed based on the time dependent experimental results. In addition, the unique structure of CoMn2O4 microflowers exhibits superior electrochemical performances with an initial discharge specific capacity of 1024 mA h g(-1) at 1000 mA g(-1) and remains at 650 mA h g(-1) with a coulombic efficiency of 98.7% after 500 cycles. (C) 2016 Elsevier B.V. All rights reserved.