Porous magnesium oxide composite for high-performance electrochemical energy storage

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy Pub Date : 2025-04-27 DOI:10.1016/j.ijhydene.2025.04.292

Masoud Amiri , Farhad Golmohammadi , Ali Ebrahimi Pure , Muhamed Aydin Abbas , Meysam Safari

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Abstract

In this study, a porous magnesium oxide composite (CMnAz) was synthesized via a simple and eco-friendly sol–gel method using azodicarbonamide (Az) as a nitrogen source. The CMnAz composite was integrated onto activated carbon cloth (ACC) to fabricate a flexible electrode for high-performance supercapacitors. Comprehensive structural characterizations, including SEM, TEM, SAED, XPS, FTIR, and BET, confirmed the high porosity, crystallinity, and compositional integrity of the composite. Electrochemical analyses revealed a specific capacitance of 450 F g⁻¹ at 1 A g⁻¹, with excellent rate capability (64 % retention at 20 A g⁻¹) and cycling stability (about 88 % capacitance retention after 10000 cycles). The device also demonstrated a high energy density of 25 Wh kg⁻¹ and a maximum power density of 16 kW kg⁻¹, outperforming many existing ACC-based supercapacitor systems. Additional voltage-holding and self-discharge tests confirmed the structural stability and low leakage characteristics of the device. These findings underscore the potential of CMnAz/ACC composites as promising candidates for next-generation energy storage devices.

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用于高性能电化学储能的多孔氧化镁复合材料

本研究以偶氮二甲酰胺（Az）为氮源，采用简单环保的溶胶-凝胶法制备了多孔氧化镁复合材料（CMnAz）。将CMnAz复合材料集成到活性炭布（ACC）上，用于制造高性能超级电容器的柔性电极。综合结构表征，包括SEM， TEM， SAED， XPS， FTIR和BET，证实了复合材料的高孔隙度，结晶度和成分完整性。电化学分析表明，该材料在1ag−1下的比电容为450fg−1，具有优异的倍率能力（在20ag−1下保持64%）和循环稳定性（在10000次循环后保持约88%的电容）。该装置还展示了25 Wh kg - 1的高能量密度和16 kW kg - 1的最大功率密度，优于许多现有的基于交流的超级电容器系统。附加的保压和自放电测试证实了该装置的结构稳定性和低漏特性。这些发现强调了CMnAz/ACC复合材料作为下一代储能设备的潜力。

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

International Journal of Hydrogen Energy 工程技术-环境科学

CiteScore

13.50

自引率

25.00%

发文量

3502

审稿时长

60 days

期刊介绍： The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc. The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.