Spherical/Porous Cox-Mny-O4 Spinel Compound for High Performance Lithium Rechargeable Battery Electrodes

Wednesday, 27 May 2015
Salon C (Hilton Chicago)
S. Choi, Y. J. Yun (Korea Research Institute of Chemical Technology), J. S. Park (Hanyang University), and H. K. Jung (Korea Research Institute of Chemical Technology)
Transition metal oxides such as cobalt- or manganese-based oxides have been proved to be promising materials for applications in high voltage and high energy density Li-ion batteries (LIBs) [1-3]. Most of those ²conversion reaction² involved metal oxides, however, suffer from limited reversible capacity and fast capacity fade due to their poor electronic conductivity and large volume changes. Thus, fabrication of nanostructured materials and/or intrinsically enhanced electrically conductive materials have been demonstrated to be effective ways to alleviate these problems [4,5]. In this work, ternary Co-Mn-O spinel oxides have been investigated as electrode materials for Li-ion and Li-air rechargeable battery. Crystalline spinel structured CoMn2O4 and MnCo2O4 compounds with nano/submicrorods were synthesized by a using hydrothermal reaction. When evaluated as an anode material for LIBs, the as-synthesized spherical/porous spinels exhibited superior initial charge/discharge capacity including good rate capability. The developed hierarchical structure with high surface area, catalyst(CoMn2O4 and MnCo2O4)/activated carbon, can also be applied to the analogous hybrid cathodes used in Li-air batteries.