Three-dimensional nitrogen and oxygen co-doped hierarchical porous carbons prepared from polyacrylonitrile/polyamic acid composite films for supercapacitors

Li, Ruijie; Shen, Zhipeng; Zheng, Haoyu; Jin, Lu; Zhang, Yonggang; Yuan, Weiyong; Wang, Xuefei

doi:10.1016/j.est.2023.109521

Cited by 5 publications

(1 citation statement)

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“…On the contrary, lower specific capacitances were obtained with zinc, magnesium, or copper. The specific capacitance values obtained with each active metal for the The use of cobalt in supercapacitors as a promising active material was also reported by other authors [47], but in a general way using oxides such as Co 3 O 4 [48][49][50][51][52]. In this work, the good performance of cobalt was also confirmed in the case of using this metal in a MOF structure, better than what was observed in the case of using the other possible metals such as Mn, Ni, Mg, Cu, and Zn.…”

Section: Electrochemical Properties Of Mof-74 Electrodessupporting

confidence: 75%

Direct Synthesis of MOF-74 Materials on Carbon Fiber Electrodes for Structural Supercapacitors

Martinez-Diaz,

Leo,

Crespo

et al. 2024

Nanomaterials

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The use of fossil fuels has contributed significantly to environmental pollution and climate change. For this reason, the development of alternative energy storage devices is key to solving some of these problems. The development of lightweight structures can significantly reduce the devices’ weight, thereby reducing energy consumption and emissions. Combining lightweight structures with alternative energy storage technologies can further improve efficiency and performance, leading to a cleaner and more sustainable system. In this work, for the first time, MOF-74 materials with different divalent metal ions have been synthesized directly on carbon fiber, one of the most widely used materials for the preparation of electrodes for supercapacitors with structural properties. Different techniques, such as nitrogen adsorption–desorption isotherms, cyclic voltammetry or galvanostatic charge–discharge, among others, were used to evaluate the influence of the metal cation on the electrochemical capacitance behavior of the modified electrodes. The Co-MOF-74 material was selected as the best modification of the carbon fibers for their use as electrodes for the fabrication of structural supercapacitors. The good electrochemical performance shown after the incorporation of MOF materials on carbon fibers provides a viable method for the development of carbon fiber electrodes, opening a great variety of alternatives.

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