Facile synthesis of the binder-free CoNiMn LTH/nickel foam electrode for high-performance hybrid supercapacitor

M.H. Sepahdar , S.M. Masoudpanah , M. Sh. Bafghi , B. Aslibeiki , M. Namayandeh Jorabchi
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Abstract

The facile synthesis of binder-free electrodes for supercapacitors is crucial, as it provides high electrochemical performance, excellent conductivity, easy manufacturing, and enhanced cycling stability. Layered double hydroxides (LDH) and layered triple hydroxides (LTH) are excellent candidates for achieving these storage characteristics. In this work, binder-free CoNi LDH/nickel foam (NF), CoMn LDH/NF, NiMn LDH/NF, and CoNiMn LTH/NF electrodes were prepared using a facile one-step hydrothermal method. Various characterization techniques were employed to investigate and compare the structural, microstructural, and electrochemical properties. The CoNiMn LTH/NF electrode demonstrated the highest specific capacitance of 2212 F g⁻¹ , attributed to its unique 1D nanoneedle morphology and the synergistic effect of Co, Ni, and Mn elements. The nanoneedle morphology of CoNiMn LTH/NF results in additional diffusion channels and facilitates the penetration of electrolytes. Moreover, the CoNiMn LTH/NF//activated carbon capacitor exhibited battery-type behavior with an energy density of 26.4 Wh kg⁻¹ at a power density of 1397 W kg⁻¹ .
高性能混合超级电容器用无粘结剂CoNiMn LTH/泡沫镍电极的简易合成
无粘结剂的超级电容器电极的简单合成是至关重要的,因为它提供了高电化学性能、优异的导电性、易于制造和增强的循环稳定性。层状双氢氧化物(LDH)和层状三氢氧化物(LTH)是实现这些存储特性的绝佳候选者。采用简单的一步水热法制备无粘结剂的CoNi LDH/ni foam (NF)电极、CoMn LDH/NF电极、NiMn LDH/NF电极和CoNiMn LTH/NF电极。采用了各种表征技术来研究和比较其结构、微观结构和电化学性能。CoNiMn LTH/NF电极由于其独特的一维纳米针形态和Co、Ni、Mn元素的协同作用,表现出2212 F g⁻¹ 的最高比电容。CoNiMn LTH/NF的纳米针状形态导致了额外的扩散通道,有利于电解质的渗透。此外,CoNiMn LTH/NF//活性炭电容器表现出电池型行为,能量密度为26.4 Wh kg⁻¹ ,功率密度为1397 W kg⁻¹ 。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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