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Almost all existing methods for preparing reduced graphene oxide/Mn 3 O 4 (RGO/Mn 3 O 4 ) composites are based on the synthetized graphene or graphene oxides (GO), which make them complicated and high-cost processes. Here, we reported a new method, which is able to convert graphite directly to RGO/Mn 3 O 4 composites. Thus, it is simpler, more economical, and productive. The structure of RGO/Mn 3 O 4 inheriting intermediate product GO/MnO 2 composites that are formed by the present method is a novel three-dimensional "multilayer steamed bread" nanostructure, which constitutes mutually beneficial "symbiosis". The nano-Mn 3 O 4 supports the space between RGO layers and further to the combination of RGO to self-assemble into large-sized (&gt;40 μm) nanocomposites. Meanwhile, the formed Mn 3 O 4 particles were small (60 × 10 nm 2 ) in diameter and distributed homogeneously without the use of any template and surfactant. Because the structure and nanosize of composite cause the excellent electrochemical properties, RGO/Mn 3 O 4 electrodes deliver an enhanced specific capacitance of 438.7 F/g at 0.3 A/g and outstanding cyclic stability (77.5% of its initial capacitance is retained after 1000 cycles).

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Producing “Symbiotic” Reduced Graphene Oxide/Mn<sub>3</sub>O<sub>4</sub> Nanocomposites Directly from Converting Graphite for High-Performance Supercapacitor Electrodes

Producing “Symbiotic” Reduced Graphene Oxide/Mn3O4 Nanocomposites Directly from Converting Graphite for High-Performance Supercapacitor Electrodes

Producing “Symbiotic” Reduced Graphene Oxide/Mn₃O₄ Nanocomposites Directly from Converting Graphite for High-Performance Supercapacitor Electrodes