Speaker
Description
Graphene-based textile electrodes have attracted considerable attention for wearable energy storage applications due to their lightweight structure, flexibility, and excellent electrical properties. However, conventional fabrication methods often suffer from poor coating uniformity, limited scalability, and inadequate durability. In addition, structural defects and graphene agglomeration can adversely affect the electrical conductivity and mechanical performance of the electrodes. This study investigates the effect of dip-dry coating cycles on the uniformity and structure of graphene oxide (GO) and reduced graphene oxide (rGO) coatings on cotton fabric electrodes. The 24 mm diameter circular cotton fabric substrates were coated using a simple and scalable dip-dry process with 2 and 10 coating cycles, employing GO and rGO aqueous dispersions. The influence of coating cycles on graphene deposition, coating uniformity, and structural characteristics was systematically evaluated. Morphological and structural characterization were performed using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and Raman spectroscopy. The results show that increasing the number of dip-dry cycles enhances graphene coverage on the cotton fibers and promotes the formation of a more continuous and inter-connected coating network. Furthermore, the structural differences between GO and rGO coatings were confirmed by Raman spectroscopy. These findings demonstrate that coating cycle number plays a critical role in determining the structural quality of graphene-coated textile electrodes, providing valuable in-sights for the development of flexible and wearable supercapacitor applications.
Keywords: Graphene oxide (GO), Reduced graphene oxide (rGO), Dip-dry coating, Cotton fabric electrode, Wearable supercapacitor.
