Prof. Jinzhang Liu
Prof. Jinzhang Liu
Beihang University, China
Title: Increasing the Capacitance of Graphene-Based Supercapacitor Electrodes by Functionalization with Small Organic Molecules
To date, graphene-based electric double-layer supercapacitors have not shown the remarkable specific capacitance as theoretically predicted. An efficient strategy towards boosting the overall capacitance is to endow graphene with pseudocapacitance. Herein, small aromatic molecules are rationally selected from a vast number of existing species to functionalize N-doped graphene (NG) via π-π interaction and the resulting enhanced electrochemical energy storage is reported. These aromatic molecules in monolayer form on graphene contribute strong pseudocapacitance. To understand factors of small molecules that influence the resulting capacitance, molecules containing amino or hydroxyl groups and their isomers are compared in terms of pseudocapacitance and redox behaviors. Not only excellent organic molecules are found to match graphene for boosting the specific capacitance of electrodes, but also an insight into the inherent factors of molecules related to the pseudocapacitance strength is provided.
Dr. Jinzhang Liu is an associated professor at the School of Materials Science and Engineering, Beihang University, China. He holds a PhD in Condensed Matter Physics from Lanzhou University. After extending his academic career in Ajou University, South Korea, and Queensland University of Technology, Australia, he returned to China and joined Beihang University. He has published more than 60 papers in journals, books and conference proceedings, and his H-index is 20. Currently, he is working on electrochemical energy storage devices involving carbon nanomaterials, solar energy desalination, and high dielectric composites.