2021-04-07

Extended cycle life, new carbon-based lithium-ion capacitors come out

By yqqlm yqqlm

Science and Technology Daily News (Reporter Wang Jiangao, Correspondent Liu Jia) A reporter learned from the Qingdao Institute of Bioenergy and Processes, Chinese Academy of Sciences on March 24 that the institute has developed a long-cycle life carbon-based lithium-ion capacitor monomer, marking my country’s An important breakthrough was made in the industrialization of high-performance carbon-based lithium-ion capacitors.

Lithium-ion capacitor is a new type of energy storage device between supercapacitors and lithium-ion batteries. It has high energy density, high power density, fast charge and discharge, long cycle life and high safety performance. And other advantages, it has a wide range of application prospects in the fields of rail transit, energy recovery and accelerated start of electric vehicles, new energy power generation, aerospace, and national defense and military.

Extended cycle life, new carbon-based lithium-ion capacitors come out

But due to complex technology and high cost, etc. The reason is that the current key industry technology and high-performance raw material technology of lithium-ion capacitors has not achieved a breakthrough in my country, and lithium-ion capacitors basically rely on imports.

The reporter learned during the interview that, relying on the Qingdao Institute of Energy of the Chinese Academy of Sciences, with the joint efforts of Wu Jianfei and Sun Xiaolin senior engineers, the advanced energy storage materials and technology research group of the institute has developed high The core materials of positive and negative electrodes with high capacity and high rate have successfully developed carbon-based lithium ion capacitor monomers with long cycle life. The actual capacity of its monomer is 780F, and the capacity of 100,000 cycles of high-rate cycling still maintains above 95.7%.

The advanced energy storage materials and technology research group of the institute has continuously achieved breakthrough results in the field of lithium-ion capacitors after step-by-step practice, which has attracted the attention of well-known domestic enterprises. According to Wu Jianfei, starting from 2020, the research group and CRRC Sifang Vehicle Research Institute have jointly applied for key technological research projects in Shandong Province, and signed a strategic cooperation agreement with Shandong Water Development Group, striving to develop lithium-ion capacitors with independent intellectual property rights. The monomer is used in the fields of rail transit, energy recovery of family cars and wind and solar storage.