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- W2904939103 abstract "Abstract Nitrogen-enriched graphene coupled with nickel hydroxide nanosheets (Ni(OH)2/NG) hydrogel is successfully synthesized through a facile one-pot hydrothermal method. Comprehensive investigations reveal that the nitrogen atoms are successfully inserted into graphene and that the nickel hydroxide nanosheets (∼30–50 nm) are anchored on NG homogeneously. With the enhanced electroactivity caused by nitrogen doping and the synergy effect from Ni(OH)2 nanosheets and NG, the Ni(OH)2/NG hydrogel electrode displays much better electrochemical properties than two individual electrodes. It features a specific capacitance as high as 896 F g−1 at 0.5 A g−1 and even 504 F g−1 at 12 A g−1 showing a high rate capability (56.3% retention with 24 times higher current density). An asymmetric supercapacitor device on the basic of Ni(OH)2/NG hydrogel and activated carbon (AC) was assembled and delivered a high energy density of 28.7 W h kg−1 at the power energy density of 0.36 kW kg−1. Such results indicate that the Ni(OH)2/NG hydrogel could be considered as a promising candidate for electrochemical supercapacitors." @default.
- W2904939103 created "2018-12-22" @default.
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- W2904939103 date "2019-04-01" @default.
- W2904939103 modified "2023-10-11" @default.
- W2904939103 title "Hydrogels that couple nitrogen-enriched graphene with Ni(OH)2 nanosheets for high-performance asymmetric supercapacitors" @default.
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- W2904939103 doi "https://doi.org/10.1016/j.jallcom.2018.12.188" @default.
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