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- W2883096656 abstract "Abstract Manganese oxide (MnO2) has been comprehensively studied as one high-voltage electrode material in the neutral aqueous supercapacitors, whereas the working potential window (WPW) for the device hasn’t exceeded 2.0 V in most reports. Here, interlaced ultrathin MnO2 nanoflakes were vertically aligned on the carbon cloth (CC) via a facial potentiostatic electrochemical deposition method. A stable WPW for the MnO2/CC electrodes in three electrolytes of 0.5 M A2SO4 (A = Li, Na, K) was defined as 0–1.1 V, which was attributed to the nanoporous morphology of the MnO2 nanosheets and high content of structure water within it. Furthermore, the MnO2 nanoflakes with 0.5 M Na2SO4 have achieved a high specific capacitance of 272.2 F/g at 2 mV/s, and the retention of the performance was 83.8% (5 A/g) after 5000 cycling tests. As for the flexible asymmetric MnO2 supercapacitors (FAMSC), the MnO2/CC electrode was used as a cathode and a self-assembled rGO film was developed as an anode. Working in an extended WPW of 0–2.2 V, the FASMC exhibited a large energy density of 49.8 Wh/kg and the retention of the performance was 88.7% at 5 A/g after 5000 cycles. This work provides a stable WPW for the MnO2 electrodes, which may promote further development of the high-voltage neutral aqueous supercapacitors." @default.
- W2883096656 created "2018-08-03" @default.
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- W2883096656 date "2018-11-01" @default.
- W2883096656 modified "2023-10-16" @default.
- W2883096656 title "Enlarged working potential window for MnO2 supercapacitors with neutral aqueous electrolytes" @default.
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- W2883096656 doi "https://doi.org/10.1016/j.apsusc.2018.07.147" @default.
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