基于聚乙烯吡咯烷酮表面活性剂的超级电容器电极材料ZnWO<sub>4</sub>@rGO的制备及性能研究

doi:10.11896/cldb.25040062

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Abstract Metal oxide zinc tungstate(ZnWO₄) is an ideal choice for supercapacitor electrode materials due to its good electrochemical stability and pseudocapacitive properties; meanwhile reduced graphene oxide(rGO) is an excellent additive for the preparation of electrode materials due to its unique two-dimensional structure, high specific surface area, carrier mobility and other unique properties. However, the conventional graphene composites constrain the performance of graphene composite electrode materials due to insufficient composite, low specific capacity, and poor stability caused by poor graphene dispersion. In view of this, the present work provides a method based on nonionic surfactant-assisted preparation of supercapacitor electrode ZnWO₄@rGO, i.e., on the basis of the hydrothermal method, polyvinylpyrrolidone(PVP), a nonionic surfactant, is introduced to regulate and modify the ZnWO₄@rGO, and the ZnWO₄@rGO electrode material prepared using this method has a specific capacity as high as 1 190 F·g^-1, the energy density was 49.9 Wh·kg^-1, and the capacitance retention rate was 97.4% after 1 000 cycles. This excellent performance is attributed to the four-fold mechanism of “conductive network+activity enhancement+structural stabilization+inhibition of chalking” of PVP, which leads to the enhancement of the homogeneity, structural stability, and electrochemical properties of ZnWO₄@rGO.

Key words： reduced graphene oxide zinc tungstate polyvinylpyrrolidone (PVP) hydrothermal method supercapacitor

Published: 25 March 2026 Online: 2026-04-03

CLC number:

TB34

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	Articles by authors
	HE Geping
	FU Zeguo
	YANG Quan
	BAO Chenhao
	XU Rui
	LI Mengxuan
	JING Gege
	GOU Wenhao

Cite this article:

HE Geping,FU Zeguo,YANG Quan, et al. Preparation and Properties of Supercapacitor Electrode Material ZnWO₄@rGO Based on Polyvinylpyrrolidone Surfactant[J]. Materials Reports, 2026, 40(6): 25040062-8.

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https://www.mater-rep.com/EN/10.11896/cldb.25040062 OR https://www.mater-rep.com/EN/Y2026/V40/I6/25040062

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