多孔花状异质结构NiCo2O4/Co3S4-M：制备及其非对称超级电容器性能

doi:10.15541/jim20250387

摘要/Abstract

摘要： 超级电容器具有高功率密度、快速充放电能力和长循环寿命,在储能领域展现巨大的应用潜力。然而,其能量密度较低,限制了进一步发展。本研究通过水热法、模板辅助法及硫化处理构筑了多孔花球状的NiCo₂O₄/Co₃S₄-M异质结构的电极材料,并系统研究其电化学性能。三电极体系中,NiCo₂O₄/Co₃S₄-M在1 A·g^-1下比容量达2362 F·g^-1。其多孔花球结构了提供丰富位点,异质界面优化了电子与离子传输,两者协同显著增强了材料的导电性及稳定性。进一步组装了以NiCo₂O₄/Co₃S₄-M花球为正极、多孔碳(PC)为负极的非对称超级电容器(NiCo₂O₄/Co₃S₄-M//PC),功率密度为375 W·kg^-1时,其能量密度高达98.4 Wh·kg^-1,功率密度增至7500 W·kg^-1时,能量密度依然保持在45.42 Wh·kg^-1。且循环稳定性优异,NiCo₂O₄/Co₃S₄-M//PC在5 A·g^-1的电流密度下循环10000次后容量保持率为99.7%,库仑效率为97.56%。本研究通过异质结构设计与微观形貌调控的策略,有效实现了高比电容与优异的循环稳定性,为开发高性能超级电容器电极材料提供了新的研究思路。

关键词: 多孔花球状, 异质结构, 高比电容, 循环稳定性, 超级电容器

Abstract: Supercapacitors are demonstrated significant application potential in the energy storage field due to their high power density, rapid charge-discharge capability, and long cycle life. However, their relatively low energy density restricts further development. In this study, porous flowerball-like NiCo₂O₄/Co₃S₄-M heterostructured electrode materials were constructed via hydrothermal method, template-assisted growth, and sulfuration treatments, and their electrochemical performance was systematically investigated. In three-electrode system, NiCo₂O₄/Co₃S₄-M exhibits a specific capacitance of 2362 F·g^-1 at 1 A·g^-1. The porous flowerball structure affords abundant active sites, and the heterointerface facilitates electron/ion transport, synergistically boosting both conductivity and stability. Furthermore, an asymmetric supercapacitor (NiCo₂O₄/Co₃S₄-M//PC) was assembled using NiCo₂O₄/Co₃S₄-M flowerball as the cathode and porous carbon (PC) as the anode, achieving a high energy density of 98.4 Wh·kg^-1 at a power density of 375 W·kg^-1, which maintained 45.42 Wh·kg^-1 with the power density even increased to 7500 W·kg^-1, along with outstanding cycling stability. After 10000 cycles at a current density of 5 A·g^-1, the capacitance retention rate reached 99.7% with a Coulombic efficiency of 97.56%. This study indicates that the strategy of heterostructure design and microstructure modulation can effectively achieve high specific capacity and superior cycling stability, providing new research insights for the development of high-performance supercapacitor electrode materials.

Key words: porous flowerball, heterostructure, high specific capacitance, cycling stability, supercapacitor

中图分类号:

TQ152

石璞, 鲁芊芊, 刘鑫, 张亚琴, 李福枝. 多孔花状异质结构NiCo₂O₄/Co₃S₄-M：制备及其非对称超级电容器性能[J]. 无机材料学报, DOI: 10.15541/jim20250387.

SHI Pu, LU Qianqian, LIU Xin, ZHANG Yaqin, LI Fuzhi. Porous Flower-like NiCo₂O₄/Co₃S₄-M Heterostructure: Preparation and Its Performance of Asymmetric Supercapacitor[J]. Journal of Inorganic Materials, DOI: 10.15541/jim20250387.

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多孔花状异质结构NiCo₂O₄/Co₃S₄-M：制备及其非对称超级电容器性能

Porous Flower-like NiCo₂O₄/Co₃S₄-M Heterostructure: Preparation and Its Performance of Asymmetric Supercapacitor

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