Gradient-microstructural porous graphene gelatum/flexible graphite plate integrated electrode for vanadium redox flow batteries. (1st January 2020)

• Record Type: Journal Article
• Authors: Jing, Minghua; Zhang, Chunling; Qi, Xiaochen; Yang, Yuxuan; Liu, Jianguo; Fan, Xinzhuang; Yan, Chuanwei; Fang, Dawei
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 1(2020)
• Page Start: 916
• Page End: 923
• Publication Date: 2020-01-01
• Subjects: Graphene porous gel -- Gradient structure -- Integrated electrode -- Polarization -- Vanadium redox flow batteries; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2019.10.123
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: A novel 3D electrochemically reduced graphene oxide (ERGO) porous gelatum material was self-assembled on graphite plate (GP) by the simple and controllable electrodeposition method to construct a new-type integrated electrode (ERGO-GP) for all vanadium redox flow batteries (VRFBs). Benefited from the ideal preparation method, a porous and gradient microstructure of ERGO was formed easily and facilitated the electrolyte, ions and electron transport simultaneously. Besides, the direct growth of ERGO on GP could reduce the contact resistance between the reaction layer and the conduction layer effectively. As a result, the electrochemistry and battery performance for the ERGO-GP as both negative and positive electrode of VRFBs were better than the common carbon felts (CF) and GP electrode system (CF-GP) due to the lower polarization. The obtained results also indicated the great promise of this material for application in other flow redox batteries and helped us to improve the design of carbon-based porous electrodes. Graphical abstract: Image 1 Highlights: Microstructure gradient porous graphene gel was self-assembled by electrodeposition. ERGO-GP integrated electrode showed both excellent activity and conductivity. ERGO-GP integrated electrode decreased various cell polarization simultaneously. ERGO-GP integrated electrode held great promise in redox flow batteries.