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Graphene-coupled flower-like nickel sulfide monoliths that exhibit ultra-light, mesoporous structures and uniform particle sizes are successfully prepared using an F127-assisted hydrothermal method and high-temperature pyrolysis. As an electrode material for supercapacitors, the as-prepared rGO-Ni3S2 shows ultra-high specific capacitances of 1315 and 1050Fg−1 at 1 and 10Ag−1, respectively. After 1000...
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