| 초록 |
Numerous efforts have been made to investigate manganese carbonate as active materials in the field of energy storage. To explore the full use of MnCO3 for supercapacitor in aqueous electrolyte, a facile hydrothermal method was developed to synthesis g- C3N4 quantum dots /MnCO3/carbon cloth composites (q-MC//CC) as a binder-free electrode. With the adding C3N4 quantum dots in MnCO3, the superior electrochemical performance was achieved, including high capacitive properties of 1001.9 F/g at 1 A/g and a good cycling stability of 96% retention after 5000 cycles. In addition. an asymmetric supercapacitor with a-MC//CC as positive electrode and CC as negative electrode yielded a high energy density of 27.1 Wh/kg at a power density of 500 W/kg. The synthetic strategy provides a fine reference for metal carbonate structures and the results indicate that q-MC//CC electrode can be a promising material for energy storage applications. |
