Layered double hydroxides for preparing CoMn2O4 nanoparticles as anodes of lithium ion batteries

In the field of lithium-ion batteries, CoMn2O4 as an anode material has attracted a wide attention because it inherited the splendid electrochemical performances of Mn and Co-based metal oxides. Compared to graphite, Co-based oxides have a higher capacity which is about twice of the graphite. Moreover, Mn-based oxides have lower operating voltages and manganese exists abundantly in nature. Layered double hydroxides (LDHs), similar with brucite structure, were used as precursor for CoMn2O4 nanoparticles in this work. Under high temperature process, the LDHs decomposed to CoMn2O4 nanoparticles. When evaluated as anode materials for lithium ion batteries, the CoMn2O4 nanoparticles behaved good electrochemical performance with the discharge and charge capacity of 733 mAh g−1 and 721 mAh g−1 at current density of 200 mA g−1 after 100 cycles. This method for preparing CoMn2O4 nanoparticles is easy, which may provide a way for synthesis of other bimetallic oxides and anodes of lithium ion batteries.