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首页> 外文期刊>Journal of Electroanalytical Chemistry: An International Journal Devoted to All Aspects of Electrode Kinetics, Interfacial Structure, Properties of Electrolytes, Colloid and Biological Electrochemistry >Electrochemical generation of hexacyanoferrate and hexacyanoruthanate electroactive films at nickel electrode surfaces: A promising synthetic approach for new electrode materials in metal ion batteries and supercapacitors
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Electrochemical generation of hexacyanoferrate and hexacyanoruthanate electroactive films at nickel electrode surfaces: A promising synthetic approach for new electrode materials in metal ion batteries and supercapacitors

机译：镍电极表面的六氰基甲甲酸酯和六氰基Oruthanate电活性膜的电化学产生：金属离子电池和超级电容器新电极材料的有希望的合成方法

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摘要

Prussian blue analogues (PBAs) have been recently investigated as promising electrode materials for battery and supercapacitor applications. While most explorations have focused on PBA nanoparticles, very little attention has been focused on PBA films deposited on a metallic support. In this work, we have examined electrogenerating hexacyanoferrate (HCF) and hexacyanoruthenate (HCR) films on nickel surfaces via cyclic voltammetry. We found that the total material deposited was influenced by themetal cation present in the electrolyte solution and that, on average, the rate of deposition of the surface adsorbed/immobilized species was dependent on the species in solution. In particular, films electrogenerated in the presence of Na+ and K+ had the highest deposition rates. The cyclic voltammetric profiles exhibited dramatic differences depending on the cation present in the electrolyte solution. In addition, we found that all films were electrochemically irreversible in the presence of Li+ and Mg2+ containing electrolyte solutions. Further, and as a proof of concept, we modified high surface area nickel electrodes with HCF in sodium-based electrolytes, finding that these electrodes could operate reversibly at equivalent C-rates as high as 1667C.
机译：最近被调查为电池和超级电容器应用的有前途的电极材料的普鲁士蓝色类似物（PBA）。虽然大多数勘探都集中在PBA纳米粒子上，但很少的注意力集中在沉积在金属载体上的PBA薄膜上。在这项工作中，我们通过循环伏安法检测了在镍表面上的电生六氰基甲酸酯（HCF）和六谱膜膜（HCR）膜。我们发现沉积的总材料受到电解质溶液中存在的主题阳离子的影响，并且平均地，表面吸附/固定化物种的沉积速率取决于溶液中的物种。特别地，在Na +和K +存在下电流的膜具有最高的沉积速率。循环伏安型材取决于电解质溶液中存在的阳离子表现出显着的差异。此外，我们发现所有薄膜在Li +和Mg2 +含电解质溶液的存在下电化学不可逆。此外，作为概念证据，我们用HCF在基于钠基电解质中改性高表面积镍电极，发现这些电极可以在高达1667℃的等效C速率下可逆地操作。

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