Abstract
Flexible energy storage devices are highly demanded for various applications. Carbon cloth (CC) woven by carbon fibers (CFs) is typically used as electrode or current collector for flexible devices. The low surface area of CC and the presence of big gaps (ca. micro-size) between individual CFs lead to poor performance. Herein, we interconnect individual CFs through the in-situ exfoliated graphene with high surface area by the electrochemical intercalation method. The interconnected CFs are used as both current collector and electrode materials for flexible supercapacitors, in which the in-situ exfoliated graphene act as active materials and conductive “binders”. The in-situ electrochemical intercalation technique ensures the low contact resistance between electrode (graphene) and current collector (carbon cloth) with enhanced conductivity. The as-prepared electrode materials show significantly improved performance for flexible supercapacitors.
Highlights
IntroductionCarbon cloth (CC) woven by carbon fibers (CFs) is typically used as electrode or current collector for flexible devices
Flexible energy storage devices are highly demanded for various applications
The transmission electron microscopy (TEM) and atomic force microscopy (AFM) images were used to identify the structural information of the as-obtained materials
Summary
Carbon cloth (CC) woven by carbon fibers (CFs) is typically used as electrode or current collector for flexible devices. We interconnect individual CFs through the in-situ exfoliated graphene with high surface area by the electrochemical intercalation method. The interconnected CFs are used as both current collector and electrode materials for flexible supercapacitors, in which the in-situ exfoliated graphene act as active materials and conductive “binders”. The in-situ electrochemical intercalation technique ensures the low contact resistance between electrode (graphene) and current collector (carbon cloth) with enhanced conductivity. The as-exfoliated graphene interconnected individual carbon fibers, which showed significantly increased surface area. The interconnected carbon fibers by graphene showed significantly improved specific capacitance as the binder-free electrode materials for flexible supercapacitors in terms of area-normalized capacitance
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