Carbon dots regulate crosslinking of functionalized three-dimensional graphene networks decorated with p-phenylenediamine for superior performance flexible solid-state supercapacitors. (August 2020)

• Record Type: Journal Article
• Authors: Du, Pengcheng; Kang, Hongxing; Dong, Yiwei
• Is Part Of: Journal of energy storage. Volume 30(2020)
• Publication Date: 2020-08
• Subjects: p-Phenylene diamine -- Carbon dots -- Regulate crosslinking degree -- Functionalized graphene networks -- Flexible solid-state supercapacitors; Energy storage -- Periodicals; Energy storage -- Research -- Periodicals; 621.3126
• DOI: 10.1016/j.est.2020.101586
• Languages: English
• ISSNs: 2352-152X

Abstract

Highlights: Novel 3D rGO networks decorated with PPD and CDs were successfully constructed. It possesses optimal specific capacitance of 468.7 F/g and excellent rate capability. FSSCs exhibit high specific capacitance 321.9 F/g and high specific energy-power. It deliver extraordinary mechanical flexibility even in a harsh environment. Abstract: p-phenylenediamine (PPD) are preferred as a functional monomer to modify graphene oxide for functionalized three-dimensional (3D) graphene networks by a facile hydrothermal method, and carbon dots (CDs) served as fill factor to regulate the crosslinking degree for optimized functionalized 3D graphene networks (rGO-PPDs-CDs), which is in favor fast-moving of ions to achieve higher capacitance performance. As a result, rGO-PPDs-CDs exhibits promising potential as an activate electrode material in supercapacitor, revealing optimal specific capacitance (468.7 F/g at a current density of 0.5 A/g) and excellent rate capability (72.9% even up to high current density of 100 A/g). Furthermore, flexible solid-state SCs (FSSCs) explored using rGO-PPD-CDs, exhibit high specific capacitance (321.9 F/g at 0.5 A/g), and maximum specific energy of 10.99 Wh/kg and highest specific power of 10.09 kW/kg. In addition, FSSCs also maintain the original performance even in a harsh environment (bending state or twisting state). The excellent electrochemical performance of FSSCs based on rGO-PPD-CDs makes it an attractive candidate for energy-storage devices. Graphical abstract: Image, graphical abstract