设计新型双金属 MOFs,优化镍和钴离子比例,提高超级电容器性能

IF 8.9 2区 工程技术 Q1 ENERGY & FUELS
M.A. Deyab , Q. Mohsen , Omnia A.A. El-Shamy
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引用次数: 0

摘要

这项研究的目的是通过创建新型双金属 MOFs 来评估新型超级电容器(Btc-Im-DMF-Nix/Coy)。新型双金属 MOFs 的结构基于不同的镍离子和钴离子比例,以及含有咪唑(Im)、二甲基甲酰胺(DMF)和苯三羧酸(BTC)的大型杂有机框架。此外,还研究了 Btc-Im-DMF-Ni2/Co1 和 Btc-Im-DMF-Ni1/Co2 的 Nix:Coy 比率对超级电容器性能的影响。新材料的出现是为了弥补传统超级电容器能量密度低的缺陷。新型材料的电化学性能通过一系列电化学研究进行了检验,包括电静态充放电(GSCD)、循环伏安法(CV)和表面分析。Btc-Im-DMF-Ni1/Co2 在 1.0 A g-1 时的最佳电容为 1640 F g-1,而 Btc-Im-DMF-Ni2/Co1 在 1.0 A g-1 时的电容为 1234 F g-1。经过 5000 次循环后,Btc-Im-DMF-Ni1/Co2 的循环稳定性(91%)高于 Btc-Im-DMF-Ni2/Co1(85.3%)。Btc-Im-DMF-Nix/Coy 中 Co 与 Ni 的比例对超级电容器的电化学活性有显著影响。在 MOFs 网络中,Co 和 Ni 由于更易于电子传输和更低的去质子化能量,因此显示出更高的容量和循环稳定性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Designing novel Bi-metallic MOFs with optimized Ni and Co ions ratios for enhanced supercapacitor performance
The goal of this work is to assess the novel supercapacitors (Btc-Im-DMF-Nix/Coy) by creating new bimetallic MOFs. The structure of novel bimetallic MOFs is based on the incorporation of varied Ni and Co ions ratios, as well as a large hetero-organic frame containing imidazole (Im), dimethyl formamide (DMF), and benzene tri carboxylic acid (BTC). Furthermore, the effect of the Nix:Coy ratio on the performance of supercapacitors was investigated for Btc-Im-DMF-Ni2/Co1 and Btc-Im-DMF-Ni1/Co2. The new materials were created to compensate for the conventional superapcitors' low energy density. The electrochemical performance of the novel materials is examined by a number of electrochemical studies, including galvanostatic charge/discharge (GSCD), cyclic voltammetry (CV), and surface analysis. The Btc-Im-DMF-Ni1/Co2 has an optimum capacitance of 1640 F g−1 at 1.0 A g−1, in contrast to Btc-Im-DMF-Ni2/Co1, which shows a capacitance of 1234 F g−1 at 1.0 A g−1. After 5000 cycles, Btc-Im-DMF-Ni1/Co2 has a greater cycling stability (91 %) than Btc-Im-DMF-Ni2/Co1 (85.3 %). The Co to Ni ratio of the Btc-Im-DMF-Nix/Coy has a significant impact on the electrochemical activity of the supercapacitor. Within the MOFs network, Co and Ni have shown improved capacity and cycle stability due to their easier electron transport and lower deprotonation energy.
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来源期刊
Journal of energy storage
Journal of energy storage Energy-Renewable Energy, Sustainability and the Environment
CiteScore
11.80
自引率
24.50%
发文量
2262
审稿时长
69 days
期刊介绍: Journal of energy storage focusses on all aspects of energy storage, in particular systems integration, electric grid integration, modelling and analysis, novel energy storage technologies, sizing and management strategies, business models for operation of storage systems and energy storage developments worldwide.
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