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【答案】应助回帖
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爱与雨下: 金币+1 2013-04-15 19:31:29
sltmac: 金币+40, 翻译EPI+1 2013-05-23 07:45:01
sltmac: 金币+20 2013-05-23 07:48:17
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By analyzing the electrochemical test results of prepared manganese oxide electrode materials, it's discovered many factors attribute to the nature of the manganese oxide capacitance, like phase structure, crystallinity, specific surface area, morphology and so on. Typically, layered manganese oxide and tunnel-type manganese oxide with larger pore size obtain higher capacitance, the tunnel-type manganese oxide with a smaller pore size has a very low specific capacitance due to the electrolyte ions’ difficulty to enter the tunnel. Because of the lattice relaxation, in Low-crystallinity manganese oxide material, ion embedding/escaping reaction take place easily, and thus offer excellent high capacitance compared to the crystalline material. The manganese oxide of large surface area materials can often provide a more redox reactive sites, which has a higher specific capacitance. Manganese oxide material morphology are not only affected by its specific surface area, but also will affect the the ions embedding/escaping path, therefore it’s another one of the important factors that decide the material capacitance. The hierarchical structure of the manganese oxide material has a great advantage in energy storage, because it has both advantages of nanometer size building unit and sub-micron size stacking structure. |
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