关键词: 超级电容器;锰氧化物;钠离子掺杂

Abstract: Sodium-doped porous manganese oxides microspheres were successfully prepared via a simple hydrothermal process. XRD result shows that the sodium addition does not affect the structure of manganese oxides. But the peak corresponding to (001)crystal plane shift to a lower diffraction angle, meaning that the interplanar of the materials becomes wider. SEM result shows that a small quantity of sodium have no effect on the morphology of products. It is found that 10% molar ratio of sodium-doped manganese oxides exhibit the best specific capacitance of 305. 4 F·g-1 at a current density of 1 A·g-1 , and exhibit excellent electrochemical stability of remained 100% after 300 cycles. This means that sodium doping can enhance the electrochemical property of manganese oxides materials.

Key words: supercapacitor;manganese oxide;sodium-doped