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We demonstrate a novel and efficient approach to fabricate reduced graphene oxide (RGO)/MnOx@carbon hollow nanospheres (HCNs) nanohybrids for high performance supercapacitor application. Mn2+ ions can bind with negatively charged O atoms on graphene oxide (GO) via electrostatic forces to generate RGO/MnOx (x⩽2) under hydrothermal condition. This process was utilized to grow MnOx layers on the surfaces...
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