低温固相法制备二氧化锰/活性炭复合材料

Synthesis of manganese dioxide/activated carbon composite by low temperature solid-state method

采用低温固相法制备了超级电容器用二氧化锰(MnO2)/活性炭(AC)复合材料,用XRD、SEM、循环伏安(CV)和恒流充放电测试研究了掺杂量对产物性能的影响。产物的粒径为1～10μm。AC的最佳掺杂量为7%,在0～0.8 V充放电,该样品的100 mA/g首次放电比电容为375 F/g,第100次和1 000次300 mA/g循环的放电比电容分别为99 F/g和74 F/g。

Manganese dioxide（MnO2）/activated carbon（AC） composite for supercapacitor was synthesized by low temperature solid-state method.Effects of doping amount on the performance of the products were studied by XRD,SEM,cyclic voltammetry（CV） and galvanostatic charge-discharge tests.The diameter of the product was 1～10 μm.The optimum doping amount of AC was 7%.When charged-discharged at 0～0.8 V,the initial 100 mA/g specific discharge capacitance of the product was 375 F/g,the specific discharge capacitance in the 100 th cycle and 1 000 th cycle with 300 mA/g was 99 F/g and 74 F/g,respectively.