Abstract Ternary transition metal oxide CoMoO4 as electrode materials have been widely investigated owing to their rich redox active sites, large specific surface area, and distinct structure characteristics. However, the supercapacitors based on CoMoO4 electrodes generally show low conductivity and poor cycling stability. Here, we report Mo-based hybrid structures through an efficient anion exchange strategy. The as-obtained CoMoO4@Co1.62Mo6S8 samples possess a specific capacitance of 665 C/g at 1 A/g. The as-assembled hybrid capacitor keeps a capacitance retention of 99.5% after 10,000 cycles. As electrocatalysts, the above electrode materials demonstrate an overpotential of 200 mV at 10 mA cm−2 for oxygen evolution reaction. This work offers new insights to design efficient and durable bifunctional electrode materials for energy storage and conversion.

中文翻译：

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实现高性能 CoMoO4@Co1.62Mo6S8 电极材料的设计策略

摘要 三元过渡金属氧化物CoMoO4作为电极材料因其丰富的氧化还原活性位点、大的比表面积和独特的结构特征而被广泛研究。然而，基于 CoMoO4 电极的超级电容器通常表现出低电导率和较差的循环稳定性。在这里，我们通过有效的阴离子交换策略报告基于 Mo 的混合结构。所获得的 CoMoO4@Co1.62Mo6S8 样品在 1 A/g 下具有 665 C/g 的比电容。组装后的混合电容器在 10,000 次循环后保持 99.5% 的电容保持率。作为电催化剂，上述电极材料在 10 mA cm-2 下显示出 200 mV 的过电位，用于析氧反应。