Advanced Electrochemical Performance of NiWO 4 /Graphene Oxide as Cathode Material for Zinc Ion Battery

Likai Deng and Shifa Wang ()
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Likai Deng: School of Electronic and Information Engineering, Chongqing Three Gorges University, Chongqing 404000, China
Shifa Wang: School of Electronic and Information Engineering, Chongqing Three Gorges University, Chongqing 404000, China

Energies, 2025, vol. 18, issue 8, 1-17

Abstract: The NiWO 4 powder was prepared by combining the hydrothermal method with calcination. Several studies have demonstrated that the NiWO 4 /graphene oxide composite can enhance the electrochemical performance of the NiWO 4 material. However, no studies have investigated the use of NiWO 4 /graphene oxide composite material as the cathode material in zinc-ion batteries. The successful preparation of the NiWO 4 /graphene oxide composite material is verified by various characterization techniques. The NiWO 4 /graphene oxide composite, which is meant to be a cathode material, is fabricated into electrode sheets and incorporated into CR2025 coin cells for electrochemical assessment. The experimental results indicate that the material exhibits a high charge–discharge specific capacity with high rates. At a current density of 0.1 A g −1 , it has a specific capacity of 490.2 mA h g −1 . Even after 2000 charge–discharge cycles at a current density of 1 A g −1 , the capacity remains constant at 75.2%. Through calculations, it is found that the charge storage is mainly contributed to by pseudocapacitance.

Keywords: NiWO 4; graphene oxide; carbon cloth; zinc ion battery; cathode material (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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