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首页> 外文会议>Batteries and energy technology (General) - 217th ECS meeting >Enhancement of Electrochemical Capacitance by Doping Rod-like Mn Oxide Electrodes with Co
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Enhancement of Electrochemical Capacitance by Doping Rod-like Mn Oxide Electrodes with Co

机译：钴掺杂棒状氧化锰电极增强电化学电容

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The electrochemical properties of nanocrystalline Mn oxide and Mn-Co doped oxide electrodes, with and without a conducting polymer (PEDOT) coating, were investigated to determine the effect of morphology, chemistry and crystal structure on the corresponding electrochemical behavior of synthesized electrodes. Mn-Co oxide electrodes with rod-like structures were synthesized electrochemically by anodic deposition from an electrolyte solution of Mn acetate and Co sulfate on Au coated Si substrates. The electrochemical behavior of the deposits was studied by cyclic voltammetry at different scan rates. Also, microstructural characterization of as-deposited and cycled electrodes was conducted using SEM. The Mn-Co oxide/PEDOT electrodes showed improved specific capacity and electrochemical cyclability relative to uncoated Mn oxide, Mn-Co oxide and Mn oxide/PEDOT electrodes. A specific capacitance of ～310 Fg~(-1), with a capacitance retention of 92% of the original value, was obtained for Mn-Co/PEDOT electrodes after 250 cycles in 0.5M Na_2SO_4 at 100 mVs~(-1).
机译：研究了具有和不具有导电聚合物（PEDOT）涂层的纳米晶Mn氧化物和Mn-Co掺杂氧化物电极的电化学性质，以确定形态，化学和晶体结构对合成电极相应电化学行为的影响。棒状结构的Mn-Co氧化物电极是通过在Au涂覆的Si衬底上由乙酸锰和硫酸Co的电解液阳极沉积而电化学合成的。通过循环伏安法在不同扫描速率下研究了沉积物的电化学行为。另外，使用SEM进行了沉积和循环电极的微观结构表征。相对于未涂覆的Mn氧化物，Mn-Co氧化物和Mn氧化物/ PEDOT电极，Mn-Co氧化物/ PEDOT电极表现出改善的比容量和电化学循环性。 Mn-Co / PEDOT电极在0.5 m Na_2SO_4中100 mVs〜（-1）下循环250次后，获得的比电容为〜310 Fg〜（-1），保持了原始值的92％。

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