Supercapacitor (Supercapacitor) as a new type of energy device in the 21st century is getting more and more attention. At present, the electrode materials of commercial supercapacitors are mainly concentrated on carbon-based materials, but carbon-based electrode materials have problems such as low specific capacity and uneven pore size distribution. Therefore, finding new carbon sources and activation technologies, exploring effective pore structure and surface property control technologies, developing carbon composite materials, and reducing production costs are of great significance for improving the performance of carbon-based supercapacitors.
The new energy materials team led by Kang Xueya, a researcher of Xinjiang Institute of Physics and Chemistry Technology, Chinese Academy of Sciences, used the chemical activation method to prepare cotton stalk-based porous materials by using Xinjiang ’s rich biomass resource-cotton straw as a raw material during the research of supercapacitor electrode materials. Activated carbon materials, preliminary exploration of a set of preparation methods for super capacitor activated carbon electrode materials. In the organic system, this new type of activated carbon electrode material has a specific capacity of 98F / g in a test of 2A / g current density. After 500 cycles, the capacity retention rate can reach 98.5% and has good conductivity And cycle performance. This research not only greatly expanded the source of activated carbon raw materials, promoted the effective use of cotton stalks, but also greatly reduced the price of activated carbon materials. Its potential economic and social benefits are huge.
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