Abstract Nanocomposite electrodes were prepared by single-phase galvanostatic electrodeposition on a stainless-steel mesh in an aqueous solution of manganese nitrate and pyrrole. On the anode, the deposited film (anodic film) was composed of spherical particle aggregates of almost pure polypyrrole, which strongly adhered to the stainless steel. In contrast, highly porous nanosheets of Mn(OH)2 effectively formed on the cathode and became Mn oxides with a trace of carbon material after calcination at 200 °C (calcined cathodic film). Both the obtained anode and calcined cathodic films on the stainless-steel meshes were characterized as capacitive materials. The anodic film showed capacitive behavior, while the calcined cathodic film exhibited a more pseudocapacitive nature. The specific capacitance of the anodic and calcined cathodic films was analyzed from the CV curves (510 and 270 F/g at 5 mV/s) and galvanostatic charge-discharge curves (430 and 220 F/g at current densities of 0.27 A/g and 0.23 A/g, respectively). During the cycle test, the calcined cathodic film gradually increased the capacitance due to ion diffusion into the MnO2 nanostructures over time, while the polypyrrole in the anodic film repeated adsorption/desorption of dopant ions during the redox processes, which led to degradation of the capacitive properties.

中文翻译：

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同时电化学沉积氢氧化锰和聚吡咯对结构和电容行为的影响

摘要 在硝酸锰和吡咯的水溶液中，在不锈钢网上通过单相恒电流电沉积制备纳米复合电极。在阳极上，沉积膜（阳极膜）由几乎纯聚吡咯的球形颗粒聚集体组成，它们牢固地粘附在不锈钢上。相比之下，高度多孔的 Mn(OH)2 纳米片有效地形成在阴极上，并在 200°C 下煅烧后变成带有微量碳材料的 Mn 氧化物（煅烧阴极膜）。在不锈钢网上获得的阳极和煅烧阴极膜均被表征为电容材料。阳极膜表现出电容行为，而煅烧阴极膜表现出更多的赝电容性质。从 CV 曲线（5 mV/s 时为 510 和 270 F/g）和恒电流充放电曲线（电流密度为 0.27 A/g 时为 430 和 220 F/g）分析阳极和煅烧阴极膜的比电容和 0.23 A/g）。在循环测试过程中，由于离子扩散到 MnO2 纳米结构中，经过煅烧的阴极膜随着时间的推移逐渐增加了电容，而阳极膜中的聚吡咯在氧化还原过程中重复吸附/解吸掺杂离子，导致电容退化。特性。