铝阳离子调控镍钴双氢化合物的制备及其在混合型电容器的应用

doi:10.19799/j.cnki.2095-4239.2025.0689

摘要/Abstract

摘要：

近年来，镍钴基层状双氢氧化物（LDHs）因其高容量、结构可调、功能多样性等特点，有望成为高性能电极材料。本研究以镀镍涤纶纤维为基底材料，通过低温化学浴得到镀镍涤纶纤维负载的镍钴基LDHs材料（NC LDH/NPFs）。并且为进一步提高镍钴基LDHs的电化学性能，以离子掺杂为基本策略，通过掺杂不同含量的Al³⁺制备了系列复合电极材料（ANC LDH/NPFs），进一步引入铝离子调控镍钴LDHs，以达到优异的电极材料结构，在通过XRD、SEM、XPS等表征手段对复合电极的结构和形貌进行表征的同时探索了NC LDHs在电容器的电化学特性。在常温三电极体系下，对不同掺杂含量Al³⁺复合电极的电化学性能进行了测试与研究。结果表明， ANC LDH/NPFs-2复合电极表现出更高的电化学性能，在1 A·g^-1的电流密度下，比电容为798 F·g^-1。组装的混合电容器也表现出较高的电化学性能，电流密度在0.5 A·g^-1时能量密度为38.2 Wh·kg^-1，相应的功率密度为453 W·kg^-1。通过铝离子的精准调控，实现制备高性能镍钴双氢化合物混合电容器，为高性能电极材料设计和开发提供了解决方案。

关键词: 层状双氢氧化物, 电极材料, 低温化学浴, 掺杂, 混合电容器

Abstract:

In recent years, nickel cobalt-based layered double hydroxides (LDHs) have been expected to become high-performance electrode materials due to their high capacity, adjustable structure, and functional diversity. In this study, nickel-coated polyester fibers were used as the substrate material, and nickel cobalt-based LDHs materials (NC LDH/NFPs) were obtained through a low-temperature chemical bath. To further improve the electrochemical performance of nickel cobalt-based LDHs, a series of composite electrode materials (ANC LDH/NPFs) were prepared by doping different contents of Al³⁺ as the basic strategy. The introduction of aluminum ions was used to regulate nickel cobalt LDHs to achieve excellent electrode material structure and electrochemical performance, and to explore the application field expansion of NC LDHs in capacitors. The structure and morphology of the composite electrodes were studied by XRD, SEM, XPS and other characterization methods,while the electrochemical properties of NC LDHs in supercapacitors were explored. The electrochemical performance of different Al³⁺ doped composite electrodes was tested and studied in a three-electrode system at room temperature. The results show that the ANC LDH/NPFs-2composite electrode exhibits higher electrochemical performance, with a specific capacitance of 798 F·g^-1 at a current density of 1 A·g^-1. The assembled hybrid capacitor also shows high electrochemical performance, with an energy density of 38.2 Wh·kg^-1and a corresponding power density of 453 W·kg^-1 at a current density of 0.5 A·g^-1. Through the precise regulation of aluminum ions, high-performance nickel cobalt double hydroxide hybrid capacitors were prepared, providing a solution for the design and development of high-performance electrode materials.

Key words: layered bimetallic hydroxide, electrode materials, low temperature chemical bath, doping, hybrid supercapacitors

中图分类号:

TB 332

韩若瑶, 洪剑寒, 刘永坤. 铝阳离子调控镍钴双氢化合物的制备及其在混合型电容器的应用[J]. 储能科学与技术, doi: 10.19799/j.cnki.2095-4239.2025.0689.

Ruoyao HAN, Jianhan HONG, Yongkun LIU. Preparation of nickel cobalt layered double hydroxides regulated by aluminum cation and its application in hybrid supercapacitors[J]. Energy Storage Science and Technology, doi: 10.19799/j.cnki.2095-4239.2025.0689.

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