摘要
Relying on seed method,a double template ZIF-8@ZIF-67 with a layered core-shell structure was made,which is used as a sacrificial template in the next steps.After going through loading process with solvent thermal method and calcination process,ZIF-8@ZIF-67 was etched and calcined into ternary ZnO/Co_(3)O_(4)/NiO successfully.Besides,benefiting from right amount of the addition of inorganic salts,the optimized ZnO/Co_(3)O_(4)/NiO-2(ZCN-2)shows the outstanding performance in its morphologic structure and electrochemical performance.In the case of a current density of 1 Ag^(-1),the high specific capacitance of 1119.11 Cg^(-1) can be calculated in ZCN-2.In addition,at 10 Ag^(-1),the capacitance value can maintain 93.75%after experiencing 5000 cycles of charging and discharging.The maximum energy density of the assembled ZCN-2//activated carbon(AC)asymmetric supercapacitor can reach 95.82 Wh kg^(-1),which is really outstanding in the present research achievements.After experiencing charge-discharge cycles with the number of 10,000 times in the case of a current density of 10 Ag^(-1),the cycling stability of this supercapacitor can reach 94.53%of the initial value.And after a charge,the device connected by two supercapacitors can make a light emitting diode(LED)shine up to 30 min successfully.
基金
the National Natural Science Foundation of China(61571245)
Natural Science Fund Project of Colleges in Jiangsu Province(16KJB430008)
the College Students Innovative Practice Fund of Jiangsu University Industrial Center(ZXJG2020058)for the help on funds for experiment sincerely。
