|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Functional Nanomaterials 2020: Translating Innovation into Pioneering Technologies
||Compact Graphene Powders with High Volumetric Capacitance: Microspherical Assembly of Graphene via Surface Modification using Cyanamide
||Kwang-Bum Kim, Young Hwan Kim, Byung Hoon Park, Yeon Jun Choi, Geon Woo Lee
|On-Site Speaker (Planned)
Graphene has received increasing attention as an electrode material for supercapacitors due to its high specific surface area and high intrinsic electrical conductivity. Recently, there have been tremendous achievements for improving the gravimetric capacitance of graphene. However, graphene’s low density limits its practical applications as electrode material for supercapacitors because of the unacceptably poor volumetric capacitance. To take full advantage of graphene’s superior properties, it preferably needs to be assembled into microspherical powder form with low ion transport resistance as well as high packing density. Herein, we demonstrate novel spray-drying strategy for the facile and scalable assembly of graphene into a compact microspherical powder via surface modification using cyanamide, which plays very important roles in the assembly process: preventing graphene oxide from interacting with water and restacking, polymerization into graphitic carbon nitride, and its thermal decomposition. More details will be discussed at the meeting.
||Planned: Supplemental Proceedings volume