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Preparation and Characterization of Polypyrrole-Derived Nanospheres

【摘要】:正Electrochemical energy storage and conversion systems such as fuel cells, supercapacitors,and Li-ion batteries have been considered as the sustainable and environmentally friendly alternative energy sources of the future.Nanostructured carbon is one of the key materials in these systems because carbon element can bond with itself principally via sp~3(diamond-like) and sp~2(graphite-like) covalence linkages possessing chemical inertness,high conductivity,and good stability.Ft is routinely used in low temperature fuel cells as the electrocatalyst support(both anode and cathode),in electrochemical capacitors as the electrode material(both positive and negative electrodes),in Li-ion batteries as the anode material.The development of new materials and advanced technologies to enable the highly effective use of these systems is a central challenge for our society.Therefore,profound research work on fundamental carbon science, discovery of novel carbon materials,and development of advanced fabrication technology could tremendously speed up the commercialization of these energy systems.In this presentation,we will report our work on the preparation and characterization of polypyrrole-derived nanospheres (polymer nanospheres,dense carbon nanospheres,and high-surface-area carbon nanospheres),and their electrochemical performance for fuel cell catalyst supports,supercapacitor electrodes,and anodes of Li-ion batteries.

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