Self-supported FeCo2O4/CoO@CNTs film as cathode material to construct high energy density supercapacitor

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry Pub Date : 2024-11-01 DOI:10.1016/j.jelechem.2024.118758

Lei Yuan , Dongkun Fan , Yuanzhen Liu , Zhaohui Li , Chunming Xu , Na Xin

引用次数: 0

Abstract

A simple hydrothermal method was used to synthesize FeCo₂O₄/CoO@CNTs composite material as the cathode material of asymmetric supercapacitor. Based on the advantages of single/bimetal oxide and the synergistic effect after compounding, the hierarchical structure material can improve the energy density. The electrode material has a capacitance of 965 F g⁻¹ at 1 A/g. The specific capacitance of an asymmetric supercapacitor assembled with FeCo₂O₄/CoO@CNTs as the positive electrode, carbon nanotubes (CNTs) as the negative electrode and KOH as the electrolyte is 142.5 F g⁻¹ at 1 A/g. The capacity retention rate is 93.7 % after 10,000 cycles, and the device delivered efficient energy of 44.5 Wh kg⁻¹ at 750 W kg⁻¹. It demonstrates the application prospects of the prepared composite materials in energy storage.

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以自支撑 FeCo2O4/CoO@CNTs 薄膜为阴极材料构建高能量密度超级电容器

采用简单的水热法合成了FeCo2O4/CoO@CNTs复合材料，作为不对称超级电容器的阴极材料。基于单一/双金属氧化物的优点和复合后的协同效应，该分层结构材料可提高能量密度。该电极材料在 1 A/g 时的电容为 965 F g-1。以 FeCo2O4/CoO@CNTs 为正极、碳纳米管（CNTs）为负极、KOH 为电解质组装的不对称超级电容器在 1 A/g 时的比电容为 142.5 F g-1。经过 10,000 次循环后，容量保持率为 93.7%，该装置在 750 W kg-1 的条件下可提供 44.5 Wh kg-1 的有效能量。这表明所制备的复合材料在储能领域具有广阔的应用前景。

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

Journal of Electroanalytical Chemistry 化学-电化学

CiteScore

7.80

自引率

6.70%

发文量

912

审稿时长

2.4 months

期刊介绍： The Journal of Electroanalytical Chemistry is the foremost international journal devoted to the interdisciplinary subject of electrochemistry in all its aspects, theoretical as well as applied. Electrochemistry is a wide ranging area that is in a state of continuous evolution. Rather than compiling a long list of topics covered by the Journal, the editors would like to draw particular attention to the key issues of novelty, topicality and quality. Papers should present new and interesting electrochemical science in a way that is accessible to the reader. The presentation and discussion should be at a level that is consistent with the international status of the Journal. Reports describing the application of well-established techniques to problems that are essentially technical will not be accepted. Similarly, papers that report observations but fail to provide adequate interpretation will be rejected by the Editors. Papers dealing with technical electrochemistry should be submitted to other specialist journals unless the authors can show that their work provides substantially new insights into electrochemical processes.