Preparation and application of mixed ligand Zn-MOF as electrode materials for supercapacitors applications

IF 5.5 3区材料科学 Q1 ELECTROCHEMISTRY Electrochimica Acta Pub Date : 2024-11-13 DOI:10.1016/j.electacta.2024.145352

Hossein Esfandian, Mohammad Mojtaba Sadeghi

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Abstract

In this study, various mixed-linker metal-organic frameworks (MOFs) based on Zn-MOF were successfully synthesized using different ratios of 1,3,5-benzenetricarboxylic acid (BTC) and 1,4-benzenedicarboxylic acid (BDC) as modulator ligands. The characterization results indicated that a lower percentage of BDC ligand effectively enhances the specific surface area of the MOFs while maintaining their microporous structure. Furthermore, the supercapacitive behavior of the synthesized Zn-MOFs with varying mixed ligand ratios was evaluated through electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and galvanostatic charge-discharge (GCD) measurements in a 6 M KOH electrolyte. Synthesized materials, namely MOF-0 (100% BTC), MOF-1 (75% BTC, 25% BDC), MOF-2 (50% BTC, 50% BDC), MOF-3 (25% BTC, 75% BDC), and MOF-4 (100% BDC) were assessed through GCD tests. These tests demonstrated specific capacitance values of 577, 683, 529, 428, and 302 F/g at a current density of 0.5 A/g, respectively. This impressive performance underscores the effectiveness of the mixed-linker strategy in optimizing the electrochemical properties of MOF for energy storage applications.

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混合配体 Zn-MOF 作为超级电容器电极材料的制备和应用

本研究采用不同比例的 1,3,5-苯三羧酸（BTC）和 1,4-苯二甲酸（BDC）作为调节配体，成功合成了基于 Zn-MOF 的各种混合配体金属有机框架（MOFs）。表征结果表明，较低比例的 BDC 配体可有效提高 MOFs 的比表面积，同时保持其微孔结构。此外，在 6 M KOH 电解液中，通过电化学阻抗谱（EIS）、循环伏安法（CV）和电静态充放电（GCD）测量，评估了不同混合配体比例合成的 Zn-MOFs 的超级电容行为。通过 GCD 测试评估了合成材料，即 MOF-0（100% BTC）、MOF-1（75% BTC，25% BDC）、MOF-2（50% BTC，50% BDC）、MOF-3（25% BTC，75% BDC）和 MOF-4（100% BDC）。这些测试表明，在 0.5 A/g 的电流密度下，比电容值分别为 577、683、529、428 和 302 F/g。这一令人印象深刻的性能强调了混合连接剂策略在优化 MOF 的电化学特性以用于储能应用方面的有效性。

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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来源期刊

Electrochimica Acta 工程技术-电化学

CiteScore

11.30

自引率

6.10%

发文量

1634

审稿时长

41 days

期刊介绍： Electrochimica Acta is an international journal. It is intended for the publication of both original work and reviews in the field of electrochemistry. Electrochemistry should be interpreted to mean any of the research fields covered by the Divisions of the International Society of Electrochemistry listed below, as well as emerging scientific domains covered by ISE New Topics Committee.