具有P和S双空位的镍钴纳米花复合材料用作超级电容器电极的研究

doi:10.11896/cldb.24030138

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Abstract Multinary transition metal oxides and sulfides have garnered intensive interest in the field of supercapacitor electrodes, among which NiCo₂S₄ has been considered as a hotspot owing to its low cost, low electronegativity and strong electrochemical activity. However, its low electron conductivity and sluggish reaction kinetics have resulted in low specific capacitance, poor rate performance, and rapid capacity decay, limiting its practical applications. Therefore, enhancing the electron conductivity and reaction kinetics of NiCo₂S₄ is crucial for improving its electrochemical performance. In this study, phosphorus and sulfur co-defected nickel cobalt nanoflowers (P-NiCo₂S_n) were synthesized via hydrothermal, sulfidation, and phosphorization methods. During the phosphorization process, both P doping and S vacancy double defects were obtained. These double defects can modulate the electronic structure, generate abundant electrochemical active sites, facilitate electron transfer, and promote reaction dynamics. Moreover, the nanoflower structure has a specific surface area of 66.342 m²·g^-1. The P-NiCo₂S_n electrode exhibits a specific capacitance of 1 257 F·g^-1 at a current density of 1 A·g^-1, and an energy density of 44.2 Wh·kg^-1 at a power density of 800 W·kg^-1. The assembled P-NiCo₂S_n//AC asymmetric supercapacitor retains 89.9% of its capacity after 10 000 consecutive charge/discharge cycles.

Key words： defect phosphorization method nanoflowers high cycling performance

Published: 10 April 2025 Online: 2025-04-10

CLC number:

TB34

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	Articles by authors
	WU Xuehu
	SUN Lixian
	XU Fen
	LI Bin
	FANG Songwen
	ZHANG Jing
	CHEN Xiang
	SONG Lingjun
	LU Junming
	GAO Yuan
	DU Maozhan
	XU Rudan

Cite this article:

WU Xuehu,SUN Lixian,XU Fen, et al. A Study on Nickel-Cobalt Nanoflower Composite Materials with P and S Double Vacancies as Supercapacitor Electrodes[J]. Materials Reports, 2025, 39(7): 24030138-7.

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https://www.mater-rep.com/EN/10.11896/cldb.24030138 OR https://www.mater-rep.com/EN/Y2025/V39/I7/24030138

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