Our paper entitled with “Electrochemically Scalable Production of Fluorine Modified Graphene for Flexible and High-Energy Ionogel-based Micro-Supercapacitors” has been published online in Journal of the American Chemical Society. Many thanks to our cooperative scientists of Prof. Bao at DICP, Prof. Feng from Technische Universität Dresden and Prof. Müllen from Max-Planck-Institut für Polymerforschung. Congratulation to Feng Zhou!
Scalable production of high-quality heteroatom-modified graphene is critical for microscale supercapacitors, but remains a great challenge. Herein, we demonstrate a scalable, single-step electrochemical exfoliation of graphite into highly solution-processable fluorine-modified graphene (FG), achieved in an aqueous fluorine-containing neutral electrolyte, for flexible and high-energy-density ionogel-based micro-supercapacitors (FG-MSCs). The electrochemically exfoliated FG nanosheets are characterized by atomic thinness, large lateral size (up to 12 um), a high yield of >70% with ≤3 layers, and a fluorine doping of 3 at%, allowing for large-scale production of FG-MSCs. Our ionogel-based FG-MSCs deliver high energy density of 59 mWh cm-3, by far outperforming the most reported MSCs. Furthermore, the all-solid-state microdevices offer exceptional cyclability with ~93% after 5000 cycles, robust mechanical flexibility with 100% of capacitance retention bended at 180°, and outstanding serial and parallel integration without the requirement of metal-based interconnects for high-voltage and high-capacitance output. Therefore, these FG-MSCs represent remarkable potential for electronics.
F. Zhou, H.B. Huang, C.H. Xiao, S.H. Zheng, X.Y. Shi, J.Q. Qin, Q. Fu, X.H. Bao, X.L. Feng, K. Müllen, and Z.S. Wu. Electrochemically Scalable Production of Fluorine Modified Graphene for Flexible and High-Energy Ionogel-based Micro-Supercapacitors. Journal of the American Chemical Society, 2018, DOI: 10.1021/jacs.8b03235