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- W2943225013 abstract "This paper introduces a green, safe and effective process for mass synthesizing graphene oxide (EGO) with high yield up to 90 wt %, excellent water solubility and good quality (˂ 5 layers reach to 95%) via electrochemical exfoliation method in acidic potassium permanganate electrolyte. Furthermore, the reacted EGO electrolyte continues to undergo a one-step hydrothermal treatment for preparing the MnO 2 /reduced graphene oxide (MnO 2 /rEGO) composite, and then it is used as an electrode material of supercapacitor. Experimental results reveal that the MnO 2 /rEGO composite exhibits a high specific capacitance of 342.8 F g −1 at a current density of 0.5 A g −1 , excellent rate capability and cycling stability with 90.3% capacitance retention after 3000 cycles. A two-electrode symmetric supercapacitor assembled device is fabricated and exhibits a high specific capacitance of 226.8 F g −1 at 0.5 A g −1 . It shows that the MnO 2 /rEGO composite provides potential applications in energy storage. • The graphene oxide (EGO) is successfully synthesized by electrochemical exfoliation method in acidic potassium permanganate electrolyte. • The waste manganese ions can be converted into MnO 2 nanowires and deposited upon the reduced GO sheets through a one-step hydrothermal reaction. • The MnO 2 /RGO symmetric supercapacitor exhibits excellent electrochemical performances." @default.
- W2943225013 created "2019-05-09" @default.
- W2943225013 creator A5015456044 @default.
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- W2943225013 date "2019-07-01" @default.
- W2943225013 modified "2023-10-06" @default.
- W2943225013 title "Green mass synthesis of graphene oxide and its MnO2 composite for high performance supercapacitor" @default.
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- W2943225013 doi "https://doi.org/10.1016/j.electacta.2019.04.178" @default.
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