Chinese Academy of Sciences: New progress in research on high specific capacitance supercapacitors

Recently, the team led by Deng Weiqiao and Wu Zhongshuai, researchers of the Dalian Institute of Chemical Physics of the Chinese Academy of Sciences, made new progress in the research of electrode materials for high specific volume supercapacitors, and successfully prepared conductive conjugate micros with high specific surface area and high nitrogen content. Porous polymers, related results were published in "German Applied Chemistry".

Supercapacitors have been used in hybrid electric vehicles. Since it stores a large amount of electric charge on the electrode by the electric double layer mechanism, finding an electrode material having a high specific surface area and high conductivity becomes a key to increasing the capacity of the device.

The cooperative team used TCNQ (7,7,8,8-tetracyano-p-dioxane) as a monomer to polymerize under ionic thermal conditions to obtain a series of high specific surface area and high nitrogen content based on covalent triazine framework structure. A quantity of conductive conjugated microporous polymer and applied to a supercapacitor electrode material. Among them, the conductive conjugated microporous polymer with an ultrahigh specific surface area of ​​3663 m2/g and a high nitrogen content of 8.13% can obtain a high specific capacity of 383 F/g, which is significantly higher than the specific capacity of commercial activated carbon, and has significant Cyclic stability.

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