Cyclic Voltammetry Curves of High Voltage Flexible Solid Supercapacitors
Recently, Ma Yanwei, superconductivity and new energy materials research group, Institute of Electrical Engineering, Chinese Academy of Sciences applied the multi-level graphene composite electrode and ionic liquid gel polymer electrolyte to develop a high-energy density flexible solid-state super Capacitor.The researchers successfully prepared a flexible solid-state supercapacitor with a wide voltage window by controlling the microstructure of the electrode and introducing ionic liquid gel electrolyte, which effectively enhanced the energy density of the device.This research will improve the energy of the flexible solid-state supercapacitor Density provides an effective strategy.
The multi-level graphene composite electrode used in this study consists of graphene and carbonized polyaniline nanowires. This composite electrode material not only enables the multidimensional recombination of one-dimensional nanocrystalline materials and two-dimensional nanocrystalline materials, but also has rich nano- The pore structure facilitates the diffusion and storage of large-sized ionic liquid electrolyte ions inside the material, and also has a large specific surface area of 2416 m2 / g and an excellent conductivity of 7246 S / m, and is particularly suitable as an organic system Of the supercapacitor electrode material based on the electrode material and the ionic liquid gel electrolyte thin film assembly of the flexible solid supercapacitor exhibits high specific capacitance (180 F / g) and good rate performance, and excellent energy density (75Wh / kg ) After charging and discharging for 10,000 cycles, the capacity can still be maintained above 85% .In addition, by in-situ testing of the performance of the capacitor under repeated bending conditions, it is found that the flexible solid supercapacitor exhibits good resistance to bending and continuous bending After 1000 times the capacity can still maintain 88% .This shows that the flexible solid supercapacitor not only has good electrochemical performance, but also show Different mechanical properties of resistance to bending.
This research was completed by the team of electricians and professor Ge Xingbo from Southwest Petroleum University and the related research results were published in the international journal Adv. Funct. Mater, 2017, DOI: 10.1002 / adfm.201704463. Science Foundation, Beijing Municipal Science and Technology Commission, Chinese Academy of Sciences Youth Promotion and the introduction of innovative electricians strong support program.
