【摘要】 在电解液(NH4)2SO4中加入Li+添加剂,用以提高二氧化锰/活性炭混合超级电容器以及活性炭电容器的容量。测试结果表明,当在2mol/L的(NH4)2SO4溶液中添加0.37mol/L的Li2CO3时,比容量提高幅度最大。添加剂在混合超级电容器中起的作用比在单纯活性炭超级电容器中大。对于混合超级电容器,加入Li+添加剂后比容量提高了77%,且2000次循环后比容量为30F/g,仅衰减了2.9%。更多还原

【Abstract】 To improve the capacitance, Li+ as additive was added to (NH4)2SO4 electrolyte for activated carbon and MnO2/ activated carbon hybrid supercapacitor. The test results show that when 0.37 mol/L Li2CO3 is added into 2 mol/L (NH4)2SO4 electrolyte, the specific capacitance is highest. The function of additive to hybrid supercapacitor is more than that to double layer capacitor. The specific capacitance of hybrid supercapacitor is higher than that of without additive by 77 %, and after 2 000 cycles, the specific capacitance is 30 F/g and reduces by 2.9 %.更多还原