Carbon base porous electrode film used in super capacitor and its preparation method

Abstract

The invention is a carbon base porous electrode film for super capacitor and the preparing method thereof. And the composition contents of the film: activated carbon 72 mass%-99mass%, conducting carbon black or graphite 0.1mass%-20mass%, zirconium oxide nano powder 0.1mass% -5mass%, and nano metallic Ni powder 0.1mass%-3mass% and the gas ratio of the film is 45%-75% and the preferential one is 55%-65%. The method firstly uniformly mixes deionized water and organic monomer with cross-linking agent; then adds dispersant in the solution and blends uniformly to obtain a preset solution; then adds in raw materials and makes ball-milling mixing to make the pulp; adds defoaming agent in the pulp for vacuum defoaming; then adds in initiator and catalyst and blends uniformly, then obtains raw blanks on a casting machine by molding, curing and defilming, and then makes weak oxidizing atmosphere thermal treatment to obtain the target porous electrode film. The invention has simple molding process, short molding time, easy operation, good film thickness controllability, and developed medium holes.

Description

technical field [0001] The invention relates to a composite carbon-based porous electrode film and a preparation method thereof, in particular to a composite carbon-based porous electrode film for supercapacitors and a preparation method thereof. technical background [0002] As one of the pillar industries of modern human civilization, energy has been paid more and more attention by people. At the same time, the environmental problems caused by the emission of various waste gases produced by energy and the greenhouse effect have become the most concerned hot spot in the world, and it is also an increasingly profound social problem. Harsh environmental pollution not only poses a serious threat to human and biological living space, but also leaves endless hidden dangers for future generations. Scientists and people of insight all over the world have appealed to governments and industrial departments of various countries to protect the earth's environment and the living space...

AI Technical Summary

Problems solved by technology

[0009] Nis h iyama Tos hi h iko et al proposed a method for preparing electrode films in patents EP0987775, JP2000082467 and US6686089, mainly adding carbon powder to acetic acid containing polypyridine, and coating it on the active material after drying Form a current collector, which forms an electrode with an active material. This method is simple to operate, but it has uneven thickness after drying of the coating, the solvent has certain toxicity, and the pore size in the film is formed due to the low solid content of the coating slurry. Too large and other problems, so it is not suitable for the preparation of thin film materials with controllable pore size distribution

[0010] Avarbz Robert Gustavoviti and others proposed a method for preparing porous electrodes in patents EP0864167 and CN1203694A. The main method is to make the required porous sheet by molding the active material and binder together. This method is suitable for preparing green sheets with a thickness greater than 300 μm At the same time, there are disadvantages such as high amount of binder, complicated process, high cost, and not suitable for continuous production.

[0011] From the above analysis, it can be seen that there are still problems to be solved in the preparation process of carbon-based electrode films, such as complex process, high amount of organic matter, long preparation cycle, toxic solvents, serious environmental pollution, or high cost. Therefore, the development of porous electrode films is low. The cost-effective rapid prototyping process has become a new idea to improve the energy density of carbon-based electrode materials, and it is an effective way to realize its wide commercial application in the fields of automobiles, electronic communications, portable electronic devices, and aerospace.