One gram of carbon material spreads up to 3,000 square meters
One gram of carbon material spreads up to 3,000 square meters. The reporter recently learned from the Yancheng Institute of Technology that a multi-hole structure carbon material was born in the school, and the use of new nanomaterial supercapacitors has created a new record for the world's extremely fast charge and discharge capacity. At present, the research results have been published online in the Nano Express. The super capacitor is a kind of energy storage device with large power density and can be charged and discharged in a very short time. However, it is limited by the energy density and the application range is far inferior to that of a lithium battery. For this reason, the balance between energy density and power density for new electrode materials has become a goal pursued by scientists. The person in charge of the study and Yancheng Institute of Technology's Jiangsu Provincial Key Laboratory of New Environmental Protection, Dr. Zhang Feng, told the reporter of the Science and Technology Daily that they use biomass chitosan as a carbon source, using silica microspheres as a hard template and combining Potassium chemical activation method has prepared a carbon material with multi-hole structure. The first-order pores are three-dimensional interconnected micron-sized macroporous networks formed after the freeze-drying of chitosan gels; the second-level pores are submicron-sized pores formed after the removal of the silica template, and are evenly distributed in the first stage. The pores on the walls of the pores; the third-order pores are nanoscale mesopores and micropores formed by the activation of potassium hydroxide, and are distributed on the surface of the second-order pores. The introduction of this multi-hole structure facilitates the rapid diffusion of electrolyte ions in the electrode. Its electrical conductivity has been comparable to that of metallic nickel, ensuring the rapid transfer of electrons within the electrode material. The huge surface area, combined with a very small charge separation distance, gives it amazing electrical capacitance. Zhang Feng said that the electrode has a mass specific capacitance of 374.7±7.7 F.g-1 at a current density of 1 A.g-1. When the current density is increased by 500 times to 500 A.g-1, the specific capacitance of the electrode can be maintained at 235.9±7.5 F.g-1 (60% of the specific capacitance at 1 A.g-1). (Correspondent Liu Tao reporter Zhang Hao) Blind Box Toys Blind Box Toy Dongguan Maimeng Cultural Communication Co., LTD , http://www.icollectoys.com