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A new single-source precursor has been developed from the hydrothermal reaction of graphite oxide (GO), melamine resin (MR) monomers, and CoCl2 to prepare a sandwich-like hybrid of ultrathin nitrogen-doped graphene (NG) sheets and porous Co3O4 nanospheres (Co3O4/NG). This unique structure endows the Co3O4/NG hybrid with large surface area and enhanced electrochemical performances as both anode material...
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