CuMn2O4/graphene nanosheets as excellent anode for lithium-ion battery

Spinel copper manganese oxide (CuMn 2 O 4 ) is synthesized via a reflux route and studied as anode for lithium-ion battery for the first time. In this work, graphene nanosheets are incorporated into the CuMn 2 O 4 composites to enhance the cycling performance of CuMn 2 O 4 material. Graphene nanosheets not only provide enough void space to buffer the volume expansion/contraction but also afford a conductive network to enhance the conductivity. The as-obtained CuMn 2 O 4 /graphene composites deliver a high discharge specific capacity of 935 mA h g −1 after 150 cycles at a current density of 50 mA g −1 . Additionally, reaction mechanism studies indicate that CuMn 2 O 4 transforms into nano-sized hybrid of CuO-MnO with a spongy porous structure during discharge-charge processes.