Great-wettability and high-temperature-resistant supercapacitor separator material

Abstract

The invention discloses great-wettability and high-temperature-resistant supercapacitor separator material which is prepared by the raw material of the following parts by weight: 35-40 parts of polyvinyl alcohol fiber, 33-35 parts of mekralon, 10-13 parts of polyacrylonitrile powder, 30-32 parts of acetone, 72-75 parts of N,N-dimethyl formamide, 8-10 parts of water soluble PVA fiber of 70 DEG C, 7-8 parts of polyvinylpyrrolidone, 8-10 parts of ethyl orthosilicate, 9-10 parts of ethanol of which the concentration is 75wt%, 6-7 parts of silicon dioxide, 9-11 parts of zeolite molecular sieve, 1-2 parts of polydimethylsiloxane, 2-3 parts of carboxymethyl cellulose and 1.5-2 parts of soya lecithin. The silicon dioxide and the zeolite molecular sieve and other components are modified through proper process and added to preparation of nonwoven fabric paste so that the porosity of the product can be increased, the aperture can be reduced and high temperature resistance and membrane rupture temperature of the product can be increased. Besides, the soya lecithin and other components are added before formation so that the wettability of the product can be increased.

Description

technical field [0001] The invention relates to the technical field of capacitor diaphragms, in particular to a supercapacitor diaphragm material with good wettability and high temperature resistance. Background technique [0002] Supercapacitor is a highly competitive energy storage device. Because it can realize fast charging, high current discharge, and has a charging life of more than 100,000 times, it plays an important role in some applications that require short-term high-rate discharge. . The power supply requirements of hybrid electric vehicles and electric vehicles have also aroused worldwide attention to supercapacitors, a new type of energy storage device. In the composition of supercapacitors, electrodes, electrolyte and separator paper play a decisive role in the performance of supercapacitors. At present, the electrodes and electrolytes of supercapacitors are research hotspots, but the research and attention on separators is not high. [0003] The separator...

AI Technical Summary

Problems solved by technology

[0004] At present, the materials used for supercapacitor separators mainly include cellulose separator paper and traditional battery separators. High-performance separator paper is difficult to manufacture and expensive; The manufacturing technology of spun nanofiber membrane is simple, low cost, the porosity of the diaphragm is as high as 90%, and the affinity to the electrolyte is good, but the disadvantage is that the strength is not high