Porous oxygen-doped NiCoP nanoneedles for high performance hybrid supercapacitor

•O-doped NiCoP nanoneedles were synthesized by hydrothermal process and subsequent phosphorization treatment.•O-doped NiCoP electrode showed high specific area capacity and mass capacity.•The assembled hybrid supercapacitor delivered a high energy density of 30.52 Wh kg−1 at a power density of 749.3...

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