Recently, Wu Zhongshuai, a researcher of the 2D Materials and Energy Devices Innovation Zone Research Institute of the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, collaborated with Klaus Müllen, professor of the Max Planck Institute for Polymer Research, and Feng Xinliang, professor of the Dresden University of Technology, using an electrochemical stripping method. Efficient preparation of fluorine-doped graphene, and the development of high-energy all-solid planar micro-supercapacitors. Related research results published in the Journal of the American Chemical Society.
In recent years, with the rapid development of wearable, portable electronic devices and MEMS (such as micro-robots, micro-sensors) in the direction of light and thin, multi-functional integration, it is urgent to develop high energy density and flexibility. Miniaturized energy storage devices.
Recently, the research team developed a green electrochemical stripping method to prepare fluorine-doped graphene in one step. This method uses graphite as a raw material and is electrochemically integrated in a neutral fluorine-containing aqueous electrolyte. High-efficiency stripping of graphite and fluorine doping, which can be used to prepare fluorine-doped graphene. The researchers have obtained a fluorine-doped graphene microelectrode by using a mask to assist the filtration method, and a high-voltage ionic liquid gel is used as an electrolyte. Successfully assembled a high-energy all-solid micro-capacitor with an energy density of up to 56mWh/cm3. At the same time, the micro-supercapacitor has excellent flexibility and cycle stability, and the capacity retention rate is 93% after 5000 cycles in the bent state. In addition, the micro energy storage device also exhibits good modular integration capability, which can effectively regulate the output operating voltage and capacity. This work provides a new strategy for efficient preparation of doped graphene and high performance micro supercapacitors.
The above work has been funded by the National Natural Science Foundation of China, the National Key Research and Development Program, and the National Youth Thousand Talents Program.
