Preparation and Properties of Supercapacitor Electrode Material ZnWO4@rGO Based on Polyvinylpyrrolidone Surfactant
HE Geping1,*, FU Zeguo1, YANG Quan2,*, BAO Chenhao1, XU Rui1, LI Mengxuan1, JING Gege1, GOU Wenhao1
1 College of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; 2 School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
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.
贺格平, 傅泽果, 杨全, 鲍晨皓, 徐锐, 李梦轩, 井格格, 苟文浩. 基于聚乙烯吡咯烷酮表面活性剂的超级电容器电极材料ZnWO4@rGO的制备及性能研究[J]. 材料导报, 2026, 40(6): 25040062-8.
HE Geping, FU Zeguo, YANG Quan, BAO Chenhao, XU Rui, LI Mengxuan, JING Gege, GOU Wenhao. Preparation and Properties of Supercapacitor Electrode Material ZnWO4@rGO Based on Polyvinylpyrrolidone Surfactant. Materials Reports, 2026, 40(6): 25040062-8.
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2026, Vol. 40 
