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Sandwich-like graphene/MnO2 nanosphere (RGO/MnO2 NS) hybrid film is assembled with graphene (RGO) nanosheets and MnO2 nanospheres (MnO2 NS) by a typical filtration-directed self-assembly method. The film structure and its electrode performance are systematically investigated. RGO nanosheets and MnO2 NS are well linked together and the MnO2 NS are uniformly embedded into the RGO matrix to form interactive...
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