Bifunctional NiO@CoZnLDH composites with flower-like nanoarchitecture: synergistic enhancement of energy storage and water electrolysis performance

IF 3.9 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Science Pub Date : 2025-09-14 DOI:10.1007/s10853-025-11455-8

Ming-Xia Wang, Xingming Zhao, Dong-Mei Ma, Yi Jia, Hong-Sheng Chu, Xiao-Ming Lu, Jun Xiang, Rongda Zhao, Fu-Fa Wu

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引用次数: 0

Abstract

The development of high-performance energy materials is essential for addressing global energy challenges. In this study, a NiO@CoZnLDH composite electrode was synthesized via a two-step hydrothermal process, and its electrochemical performance was evaluated for applications in both supercapacitors and water electrolysis. The asymmetric supercapacitor (NiO@CoZnLDH//AC) achieved an energy density of 9.44 Wh/kg at a power density of 1132 W/kg, maintaining 73.6% of its capacitance after 8000 charge–discharge cycles. For electrocatalysis, the composite exhibits low overpotential for hydrogen evolution reaction and oxygen evolution reaction (188.8 and 322.2 mV at 10 mA/ cm²) and enables stable overall water splitting at 1.84 V for 12 h in 1 M KOH. These results confirm that NiO@CoZnLDH is a promising bifunctional material for energy storage and conversion applications.

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具有花状纳米结构的双功能NiO@CoZnLDH复合材料：能量储存和水电解性能的协同增强

高性能能源材料的发展对于解决全球能源挑战至关重要。本研究通过两步水热法合成了NiO@CoZnLDH复合电极，并对其在超级电容器和水电解中的应用进行了电化学性能评价。该非对称超级电容器（NiO@CoZnLDH//AC）在1132 W/kg的功率密度下获得了9.44 Wh/kg的能量密度，在8000次充放电循环后保持了73.6%的电容。在电催化方面，该复合材料表现出较低的析氢反应和析氧反应过电位（10 mA/ cm2时为188.8 mV和322.2 mV），在1 M KOH条件下，在1.84 V电压下稳定地进行12小时的整体水分解。这些结果证实NiO@CoZnLDH是一种很有前途的能量存储和转换双功能材料。

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来源期刊

Journal of Materials Science 工程技术-材料科学：综合

CiteScore

7.90

自引率

4.40%

发文量

1297

审稿时长

2.4 months

期刊介绍： The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.