Controlled phase engineering of Fe doped NiCoLDH with 1D/2D hierarchical nanostructure for high energy density supercapacitors

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-10-01 DOI:10.1016/j.jallcom.2025.184153

Shakeel Ahmad, Muhammad Tariq, Henmei Ni, Hissah Saedoon Albaqawi, Afaq Ullah Khan, Sameerah I. Al-Saeedi, Kamran Tahir, Zainab M. Almarhoon, Magdi E.A. Zaki, Nacer Badi

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引用次数: 0

Abstract

Synergistic interactions among various components, along with deliberate structural optimization, can finely tune the electronic properties and accelerate reaction kinetics, leading to a marked improvement in electrode material performance. In this work, we report the synthesis of Fe-doped NiCo-layered double hydroxides (LDH) nanosheet heterojunctions featuring a well-engineered two/three-dimensional (2D/3D) hierarchical architecture designed to suppress aggregation and layer restacking, thereby facilitating efficient ion intercalation and extraction during electrochemical processes. The Fe_0.05/NiCoLDH electrode exhibits an outstanding specific capacitance of 2861 F g⁻¹ at a current density of 1 A g⁻¹. The assembled hybrid supercapacitor (Fe_0.05/NiCoLDH//activated carbon) delivers a high energy density of 83 Wh kg⁻¹ at a power density of 792 kW kg⁻¹, along with excellent cycling stability, maintaining 89% capacitance retention after 1000 charge–discharge cycles. This study demonstrates that Fe_0.05/NiCoLDH devices, featuring a stable multi-component hierarchical architecture and enhanced electrical conductivity, offer a promising approach to improving the electrochemical performance of supercapacitors.

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高能量密度超级电容器用一维/二维分层纳米结构铁掺杂NiCoLDH的控制相位工程

各组分之间的协同作用，以及经过深思熟虑的结构优化，可以很好地调整电子特性，加速反应动力学，从而显著提高电极材料的性能。在这项工作中，我们报道了铁掺杂nico层状双氢氧化物（LDH）纳米片异质结的合成，该异质结具有精心设计的二维/三维（2D/3D）分层结构，旨在抑制聚集和层堆叠，从而促进电化学过程中有效的离子插入和提取。Fe0.05/NiCoLDH电极在电流密度为1 a g⁻¹时表现出2861 F g⁻¹的比电容。组装的混合超级电容器（Fe0.05/NiCoLDH//活性炭）在792 kW kg⁻¹的功率密度下提供83 Wh kg的高能量密度，并具有出色的循环稳定性，在1000次充放电循环后保持89%的电容保留率。该研究表明，Fe0.05/NiCoLDH器件具有稳定的多组分分层结构和增强的导电性，为提高超级电容器的电化学性能提供了一种有前途的方法。

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.