The National Science and Chinese Academy of Sciences Shenyang metal material (joint) research laboratory of advanced carbon materials into Huiming, Li Feng, an associate researcher and doctoral student Wang Dawei and other cooperation with the University of Queensland Professor Lu HD, with the support of the National Natural Science Foundation of China, design and A novel porous carbon material with localized graphitized three-dimensional hierarchical porous structure was prepared. The material has high energy density and power density at high magnification and can be used as an electrode material for a super capacitor.
   The design principle is that the localized graphitized three-dimensional hierarchical porous structure (HPGC structure ) can make full use of the macroporous structure as an isotactic phase electrolyte storage tank to shorten the ion diffusion distance, and the mesoporous structure provides a fast ion transport channel. The synergistic effect of pore-mesopores can realize the rapid diffusion behavior of electrolyte ions in the porous carbon electrode; the high electrostatic adsorption capacity of micropores gives excellent electrochemical energy storage activity; the local graphite layer can improve the bulk of the material. Electronic conductivity. The HPGC structure can effectively increase the available electrochemical active surface area and electrochemical activity of the ions, and significantly reduce the potential polarization caused by large currents, thereby obtaining high energy/high power density electrochemical energy storage and conversion capability under high rate conditions. .
The researchers used the liquid inorganic template method to prepare HPGC materials with the above-mentioned macropore-mesopore - micropore three-dimensional hierarchical pore structure and local graphite layer structure . The experimental results show that the HPGC material has more excellent electrochemical energy storage and conversion capability than the activated carbon and ordered mesoporous carbon materials. Excellent high-rate energy storage performance can be achieved in both aqueous and organic electrolytes, which exceeds the PNGV power specifications proposed by the United States . If the working voltage of the electrolyte is further increased , a higher energy density can be expected while maintaining better than the PNGV power density index. These results indicate that the localized graphitized three-dimensional hierarchical porous structure carbon material is expected to be an excellent electrode material for electric vehicle supercapacitors.