Composite super capacitor diaphragm material with good isolation performance

Abstract

The invention discloses a composite super capacitor diaphragm material with good isolation performance. The composite super capacitor diaphragm material is prepared from the following raw materials in parts by weight: 35-40 parts of polyvinyl alcohol fibers, 33-35 parts of polypropylene fibers, 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 fibers at 70 DEG C, 4-5 parts of cationic starch, 4-5 parts of glass wool, 2-3 parts of liquid paraffin, 1.5-2 parts of dimethylsiloxane, 9-11 parts of clay, 2-3 parts of palmitic acid and 3-4 parts of polyester adhesive powder. The ingredients of the glass wool, the clay and the like are also added to preparation of a product through a series of modified additives, so that the breathability is good; the mechanical strength of the product is improved; the high-temperature tolerance is improved; the super capacitor material can also keep a good isolating state at a high temperature; and the service lifetime of a super capacitor is prolonged.

Description

technical field [0001] The invention relates to the technical field of capacitor diaphragms, in particular to a composite supercapacitor diaphragm material with good isolation performance. 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 paper of th...

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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