Anthraquinone-functionalized graphene framework for supercapacitors and lithium batteries. Issue 10 (July 2020)

• Record Type: Journal Article
• Authors: Qin, Yi; Li, Jianming; Jin, Xu; Jiao, Shuhong; Chen, Yawei; Cai, Wenbin; Cao, Ruiguo
• Is Part Of: Ceramics international. Volume 46:Issue 10(2020)Part A
• Page Start: 15379
• Page End: 15384
• Publication Date: 2020-07
• Subjects: Porosity engineering -- Graphene -- Covalent-linkage -- Energy storage; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.03.082
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Graphene is a promising material in supercapacitors. However, the restacking of graphene sheets during electrode fabrication or under service conditions greatly reduces the capacity for energy storage. Rationally designing a stable and robust 3-D framework of a graphene-based electrode is important for high-performance energy storage devices. Here we demonstrated a novel strategy to engineer the micropore structure in reduced graphene oxide materials for supercapacitors. Anthraquinone molecules as covalently-linked pillars were used to construct graphene framework and prevented the restacking of graphene sheets during fabrication processes. Compared with traditional reduced graphene oxide, the covalently-linked graphene framework contained numerous micropores, and therefore significantly enhanced the performance in supercapacitors. Moreover, this anthraquinone-functionalized graphene framework could also achieve a higher specific capacity in lithium batteries due to the additional Faradaic reaction in oxygen functional groups.