Expeditious and controllable synthesis of micron flower-like architecture Cu7S4@LSC via Ni ions morphology confinement for asymmetric button supercapacitor

•Green activated carbon materials were prepared from (LSC)Longans shell carbon and (LCC)Longans core carbon.•By introducing Ni ions to the morphology of the prepared mesh-like network CuS2@LSC composites transforms into micron flower-like Cu7S4@LSC.•Cu7S4@LSC as a positive material and alpha-Fe2O3 a...

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