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Based on the spontaneous redox reaction between metal and graphene oxide, a novel type of metal/graphene oxide (M/GO) batteries is developed to convert chemical energy into electricity, including Li/GO, Na/GO, Zn/GO, Fe/GO, and Cu/GO batteries. They are fabricated via the simple assembly of metal foils with GO films, in which M plays the role of anode, and GO acts as both cathode and separator. Among...
A sandwich-like hierarchical structure made of graphene and bimodal size of zeolitic imidazolate framework (ZIF-8) crystals is successfully synthesized, in which ZnO nanoparticles and Zn2+ ions within graphene framework induce the growth of micrometer-sized and nanometer-sized ZIF-8, respectively. The final carbonization product, N-doped carbon polyhedron/three-dimensional graphene (NCP/3DG-800) hybrid,...
A series of two-dimensional non-traditional carbon materials employing three-membered ring or four-membered ring as building blocks were systematically investigated by theoretical calculations in searching of highly conductive metallic carbon materials. It was found all the studied two-dimensional systems have metallic nature. The three-membered ring derivatives are not kinetically stable, and present...
A method for transforming carbonate into graphene using shock-wave loading is presented in this paper. Multilayer graphene was synthesized by impacting mixtures of calcium carbonate and magnesium using a detonation-driven flyer. Furthermore, by adding ammonium nitrate to the reaction system, nitrogen-doped graphene material was formed in a one-step shock-wave treatment. The recovered samples were...
Well-intergrown nanocrystals of zeolitic imidazolate frameworks (ZIF-8) supported on three-dimensional (3D) graphene were prepared by a counter diffusion technique. The incorporation of ZIF-8 crystals greatly improves the surface areas of the graphene composites. The carbonized graphene–ZIF composites with hierarchical pore structures showed high electrochemical capacitance and good stability. This...
The newly-designed vertical array structure of carbon nanotubes (CNTs) surrounding carbon nanopipes (CNTs@CNPs) was fabricated, which includes the formation of the primary CNP (ca. 200nm in diameter) arrays in virtue of the anodic aluminum oxide (AAO) membrane template with infiltration of polymer solution containing metal catalyst precursor, followed by carbonization and CVD growth of the secondary...
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