Controllable synthesis of spinel nano-CoMn2O4 via a solvothermal carbon templating method and its application in lithium ion batteries

作者：Zhang Li Xin^*; Wang Ya Lei; Jiu Hong Fang; Zheng Wen Hui; Chang Jian Xia; He Guo Feng

来源：Electrochimica Acta, 2015, 182: 550-558.

DOI：10.1016/j.electacta.2015.09.081

• CoMn2O4
• Lithium-ion batteries
• Solvothermal carbon templating method
• Hollow and yolk-shell spheres

Binary metal oxides have been proven to be promising materials because of their advantages, which can improve the electrochemical performance of single metal oxides such as reversible capacity, structural stability and electronic conductivity. In this work, hollow and yolk-shell CoMn2O4 microspheres were successfully prepared by a solvothermal carbon templating method and subsequent thermal treatment process. This structure with enough free space is beneficial to improving the electrochemical performance. The products prepared by carbon spheres with a short reaction time of 10 h have a hollow structure. The hollow CoMn2O4 samples exhibit a initial discharge capacity as 1175 mAh g(-1) at a current density of 1000 mA g(-1), and it remains at 563 mAh g(-1) with a coulombic efficiency of 97.6% after 50 cycles. The products prepared by carbon spheres with long reaction times of 12 h and 16 h have a yolk-shell structure. The yolk-shell CoMn2O4 samples exhibit high discharge capacities of 652 and 715 mAh g(-1) after 50 cycles at a high discharge rate of 1000 mA g(-1).

• 出版日期2015-11-10
• 单位中北大学