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- W2890931931 abstract "Asymmetric supercapacitors possess advantages of elevated capacitance, extended output voltage, and then improved power-energy characteristic. Here we report on a composite electrode prepared by electrodepositing manganese oxide into a graphene hydrogel and its capacitive performance in an asymmetric supercapacitor. The manganese oxide/graphene hydrogel exhibits a specific capacitance of 352.9 F g−1 at 1 A g−1. The aqueous asymmetric supercapacitor composed of an active carbon as a negative electrode and the manganese oxide/graphene hydrogel as a positive electrode possesses good cycle stability (91.5% of capacitance retention after 5000 cycles) and is able to deliver an energy density of 41.8 Wh kg−1 at a power density of 0.2 kW kg−1. Its possibility to serve as a power supply for a practical application was verified by lighting up a blue light-emitting diode. These results demonstrate the electrodeposition process has promising prospect in the preparation of high-performance composite electrodes for advanced electrochemical energy storage devices." @default.
- W2890931931 created "2018-09-27" @default.
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- W2890931931 date "2018-11-01" @default.
- W2890931931 modified "2023-10-11" @default.
- W2890931931 title "Electrodepositing manganese oxide into a graphene hydrogel to fabricate an asymmetric supercapacitor" @default.
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- W2890931931 doi "https://doi.org/10.1016/j.electacta.2018.09.025" @default.
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