Chemically Modified Graphene for Ultrafast Supercapacitorsand Photodetectors
Qinqin Zhou, Miao Zhang, Liu Qian, Shan Chen, and Gaoquan Shi
Department of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
Abstract: Chemically modified graphene (CMG) includes graphene oxide and reduced graphene oxide, and their derivatives. They can be cheaply and conveniently prepared by chemical exfoliation of graphite in a large scale. CMG sheets have unique atom-thick two-dimensional structures and excellent properties; thus they are attractive materials for the applications in energy related systems. This lecture talks about the fabrication of CMG electrodes with oriented three-dimensional porous structures for ultrafast aqueous or organic supercapaictors. These supercapacitors exhibited high-areal specific capacitances, ultrafast charging/discharging rates, and excellent electrochemical stabilities, promising for AC-line filtering. Furthermore, CMGs can be used as channel materials of phototransistors, showing sensitive responses to broadband lights. The fabrication of these devices involves only all-solution processes, making it to be cheap, convenient and scalable.
This work was supported by Natural Science Foundation of China
Prof. Gaoquan Shi received his BS degree (1985) and PhD degree (1992) at the Department of Chemistry, Nanjing University. Then he joined Nanjing University and was promoted to full professor in 1995. In 2000, he moved to Tsinghua University as a Professor of Chemistry. His research interests are focused on synthesis and applications of graphene materials and conducting polymers. He received the 2nd Grade Awards of Natural Science of China in 2016 and 2004, and the Youth Knowledge Innovation Prize of the Chinese Chemical Society and BASF Company in 2004, and the 1st Grade Award of Natural Science of Chinese Education Ministry in 2013.