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用于增强超级电容器性能的核壳结构设计：在NiMoO纳米纤维上包覆Ni(OH)/Fe(OH)

A core-shell structured design for enhanced supercapacitor performance: coating Ni(OH)/Fe(OH) over NiMoO nanofibers.

作者信息

Qiu Shuang, Sun Zhaojun, Cang Ruibai, Zhang Mingyi

机构信息

Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University Harbin 150025 P. R. China

出版信息

RSC Adv. 2024 Dec 2;14(51):38208-38221. doi: 10.1039/d4ra07251k. eCollection 2024 Nov 25.

DOI:10.1039/d4ra07251k
PMID:39624426
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11609926/
Abstract

This paper presents the development of a high-performance hydroxide-based supercapacitor electrode material, achieved through an innovative preparation strategy that integrates one-dimensional NiMoO nanofibers with Ni(OH)/Fe(OH) nanostructures, forming a NiMoO@Ni(OH)/Fe(OH) composite electrode. This material boasts a high specific capacitance (1753 F g at 1 A g) along with exceptional rate capability. The performance enhancement stems from synergies: Ni(OH)/Fe(OH)'s high surface area boosts charge storage and NiMoO nanofibers stabilize the structure, preventing nanosheet agglomeration and preserving open spaces for ion diffusion. NiMoO's conductivity aids electron transport, while Ni(OH)/Fe(OH)'s redox sites enhance charge storage, complementing each other for superior electrochemical performance. The asymmetric supercapacitor (ASC) device assembled from this composite achieved a high energy density of 324 W h kg at a power density of 33.33 W kg, fully demonstrating the great potential of the NiMoO@Ni(OH)/Fe(OH) composite in practical energy storage applications. The research provides new insights into enhancing the energy density, power density, and cycle life of supercapacitors, demonstrating significant potential for applications in the field of electrochemical energy storage.

摘要

本文介绍了一种高性能氢氧化物基超级电容器电极材料的研发情况，该材料通过一种创新的制备策略获得，即将一维NiMoO纳米纤维与Ni(OH)/Fe(OH)纳米结构相结合，形成NiMoO@Ni(OH)/Fe(OH)复合电极。这种材料具有高比电容（在1 A g时为1753 F g）以及出色的倍率性能。性能提升源于协同效应：Ni(OH)/Fe(OH)的高比表面积促进电荷存储，NiMoO纳米纤维稳定结构，防止纳米片团聚并保留离子扩散的开放空间。NiMoO的导电性有助于电子传输，而Ni(OH)/Fe(OH)的氧化还原位点增强电荷存储，二者相互补充，实现卓越的电化学性能。由这种复合材料组装而成的不对称超级电容器（ASC）装置在功率密度为33.33 W kg时实现了324 W h kg的高能量密度，充分展示了NiMoO@Ni(OH)/Fe(OH)复合材料在实际储能应用中的巨大潜力。该研究为提高超级电容器的能量密度、功率密度和循环寿命提供了新的见解，在电化学储能领域的应用显示出巨大潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/072d/11609926/184775566f3e/d4ra07251k-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/072d/11609926/6ed62c3ad7aa/d4ra07251k-s1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/072d/11609926/2cecde588ea0/d4ra07251k-f2.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/072d/11609926/826acd570830/d4ra07251k-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/072d/11609926/182de65cd4ea/d4ra07251k-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/072d/11609926/8d7d73ebe55e/d4ra07251k-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/072d/11609926/94bc2a6996d3/d4ra07251k-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/072d/11609926/e853007d2932/d4ra07251k-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/072d/11609926/184775566f3e/d4ra07251k-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/072d/11609926/6ed62c3ad7aa/d4ra07251k-s1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/072d/11609926/ddbbfdeeb4ca/d4ra07251k-f1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/072d/11609926/e4535bcb57a3/d4ra07251k-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/072d/11609926/826acd570830/d4ra07251k-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/072d/11609926/182de65cd4ea/d4ra07251k-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/072d/11609926/8d7d73ebe55e/d4ra07251k-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/072d/11609926/94bc2a6996d3/d4ra07251k-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/072d/11609926/e853007d2932/d4ra07251k-f8.jpg
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