Layered double hydroxides for preparing CoMn 2 O 4 nanoparticles as anodes of lithium ion batteries

• DOI: 10.1016/j.matchemphys.2017.03.038
• Publication Date: 2017-03-20T16:45:54Z
• Authors: Xu Pan; Jingjing Ma; Ruo Yuan; Xia Yang
• Keywords: Bimetallic strip; Layered double hydroxides

Abstract In the field of lithium-ion batteries, CoMn 2 O 4 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 CoMn 2 O 4 nanoparticles in this work. Under high temperature process, the LDHs decomposed to CoMn 2 O 4 nanoparticles. When evaluated as anode materials for lithium ion batteries, the CoMn 2 O 4 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 CoMn 2 O 4 nanoparticles is easy, which may provide a way for synthesis of other bimetallic oxides and anodes of lithium ion batteries.