Facile electro-exfoliation of binder-free expanded graphite paper electrode at low-potential in alkaline environment for all-solid-state capacitor. (June 2022) - Bu, Qijing
Highlights: The expanded graphite paper is electro-exfoliated directly in alkaline environment. The material is suitable for different energy storage systems. The material also has excellent performance after being electro-oxidated and electrodeposited. Abstract: Exfoliation is an effective strategy to improve the performance of graphite paper. In this paper, the expanded graphite paper is electro-exfoliated successfully by oxygen reduction reaction at low-potential in alkaline environment. As the surface of the electro-exfoliated expanded graphite paper becomes rough, the specific capacity and stability of the material are significantly improved, reaching 36.8 mAh g −1 at 0.5 A g −1 and 99.5% after cycling 10, 000 times. After being further electro-oxidated and electrodeposited, the treated expanded graphite paper shows excellent electrochemical properties, proving that the electro-exfoliation is an effective synthesis strategy. Graphical abstract: Image, graphical abstract