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Manganese(II,III) oxide (Mn3O4) with various shapes including square prisms, polyhedra and tetragonal bipyramids are selectively synthesized with the mediation of fatty acids at nanoscale (<20 nm). Among all nanostructures, Mn3O4 tetragonal bipyramids show the largest gravimetric capacitance of 304 F g−1 with excellent rate capability and long-term cycling stability. In contrast, Mn3O4 polyhedra...
Reduced graphene oxide/manganese dioxide/carbon black (rGO/MnO2/CB) ternary film is prepared by a simple vacuum filtration method. MnO2 nano particles grow on both sides of the graphene layers serving as active sites for the electrochemical reactions which remarkably enhance the specific capacitance. While CB acts as spacers between the graphene layers preventing the restacking of graphene sheets...
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