In situ anodic electrodeposition of two-dimensional conductive metal-organic framework@nickel foam for high-performance flexible supercapacitor
In situ anodic electrodeposition of two-dimensional conductive metal-organic framework@nickel foam for high-performance flexible supercapacitor
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DOI：
10.1016/j.jpowsour.2022.231163
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发表时间：
2022-04
影响因子：
9.2
通讯作者：
Hongxing Jia;Shun Lu;Sun Hae Ra Shin;M. Sushko;Xiaoping Tao;M. Hummel;P. Thallapally;Jun Liu;Z. Gu
中科院分区：
文献类型：
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作者：
Hongxing Jia;Shun Lu;Sun Hae Ra Shin;M. Sushko;Xiaoping Tao;M. Hummel;P. Thallapally;Jun Liu;Z. Gu
金属有机骨架(MOF)由于具有较大的比表面积和良好的孔隙率，长期以来一直被认为是最有前途的储能材料。不幸的是，由于导电性差，它们在超级电容器中的直接应用多年来一直受到阻碍，直到二维导电MOF材料的出现。到目前为止，已经报道了几种二维导电MOF基超级电容器。然而，几乎所有这些超级电容器都是由MOF粉末通过浆料包覆或致密堆积的方法制备的，这对其电容器性能产生了负面影响。在这里，我们发展了一种阳极电沉积(AED)的方法，在泡沫镍上制备了均匀沉积的2D导电MOF，并将其直接用作超级电容器的电极，而不添加任何添加剂。一系列电化学测试表明，在水和有机电解液中，2D导电MOF在泡沫镍上都具有优异的性能，表明了AED方法相对于传统方法的显著优势。
Owing to their large specific surface area and well-defined porosity, metal-organic frameworks (MOFs) have long been considered as promising materials for energy storage. Unfortunately, their straightforward utilization in supercapacitors was hindered for years due to poor conductivity until the emergence of 2D conductive MOF materials. To date, several 2D conductive MOF-based supercapacitors have been reported. Nevertheless, almost all these supercapacitors were fabricated from MOF powders through a slurry coating method or dense packing method, which negatively affected their capacitor performance. Herein, we have developed an anodic electrodeposition (AED) approach to fabricate a uniformly deposited 2D conducting MOF on nickel foam and use it directly as electrodes for supercapacitors without any additives. The superior performance of the 2D conducting MOF on nickel foam in both aqueous and organic electrolytes was then disclosed by a series of electrochemical measurements, demonstrating the significant advantages of the AED approach over traditional methods.