Shuang Qiu, Zhaojun Sun, Ruibai Cang and Mingyi Zhang
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The performance enhancement stems from synergies: Ni(OH)<small><sub>2</sub></small>/Fe(OH)<small><sub>3</sub></small>'s high surface area boosts charge storage and NiMoO<small><sub>4</sub></small> nanofibers stabilize the structure, preventing nanosheet agglomeration and preserving open spaces for ion diffusion. NiMoO<small><sub>4</sub></small>'s conductivity aids electron transport, while Ni(OH)<small><sub>2</sub></small>/Fe(OH)<small><sub>3</sub></small>'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<small><sup>−1</sup></small> at a power density of 33.33 W kg<small><sup>−1</sup></small>, fully demonstrating the great potential of the NiMoO<small><sub>4</sub></small>@Ni(OH)<small><sub>2</sub></small>/Fe(OH)<small><sub>3</sub></small> composite in practical energy storage applications. 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引用次数: 0
摘要
本文通过一种创新的制备策略，将一维NiMoO4纳米纤维与Ni(OH)2/Fe(OH)3纳米结构相结合，形成NiMoO4@Ni(OH)2/Fe(OH)3复合电极，开发了一种高性能的氢氧化物基超级电容器电极材料。这种材料具有很高的比电容（在1ag−1时为1753 F g−1）以及出色的速率能力。性能的增强源于协同作用：Ni(OH)2/Fe(OH)3的高表面积促进电荷存储，NiMoO4纳米纤维稳定结构，防止纳米片团聚并为离子扩散保留开放空间。NiMoO4的电导率有助于电子传递，而Ni(OH)2/Fe(OH)3的氧化还原位点增强了电荷存储，相互补充形成了优异的电化学性能。由该复合材料组装的非对称超级电容器（ASC）器件在33.33 W kg - 1的功率密度下获得了324 W h kg - 1的高能量密度，充分展示了NiMoO4@Ni(OH)2/Fe(OH)3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，在电化学储能领域具有重要的应用潜力。
A core–shell structured design for enhanced supercapacitor performance: coating Ni(OH)2/Fe(OH)3 over NiMoO4 nanofibers
This paper presents the development of a high-performance hydroxide-based supercapacitor electrode material, achieved through an innovative preparation strategy that integrates one-dimensional NiMoO4 nanofibers with Ni(OH)2/Fe(OH)3 nanostructures, forming a NiMoO4@Ni(OH)2/Fe(OH)3 composite electrode. This material boasts a high specific capacitance (1753 F g−1 at 1 A g−1) along with exceptional rate capability. The performance enhancement stems from synergies: Ni(OH)2/Fe(OH)3's high surface area boosts charge storage and NiMoO4 nanofibers stabilize the structure, preventing nanosheet agglomeration and preserving open spaces for ion diffusion. NiMoO4's conductivity aids electron transport, while Ni(OH)2/Fe(OH)3'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−1 at a power density of 33.33 W kg−1, fully demonstrating the great potential of the NiMoO4@Ni(OH)2/Fe(OH)3 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.
期刊介绍：
An international, peer-reviewed journal covering all of the chemical sciences, including multidisciplinary and emerging areas. RSC Advances is a gold open access journal allowing researchers free access to research articles, and offering an affordable open access publishing option for authors around the world.
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