A kind of preparation method and application of ethylene-vinyl acetate/carbon composite nanofiber

Abstract

The invention discloses a preparation method and application of ethylene-vinyl acetate / carbon composite nanofibers. During preparation, an ethylene-vinyl acetate copolymer is dissolved in methylene chloride, and conductive carbon black is added to make a spinning solution; and then Electrospinning technology is used to spin on the surface of carbon cloth, and after film formation, it is dried at low temperature to prepare ethylene-vinyl acetate / carbon composite nanofibers. The preparation method of the present invention is simple, environmentally friendly, and easy to operate. The mixed solution is prepared into a thin film structure by using electrospinning technology. This layer structure perfectly shows the various properties of the original material, and further improves the original Hydrophobic ability. This layer structure has also shown its good performance in the actual device test, and in the solid-state sandwich structure device of the zinc-air battery, the service life has been significantly improved.

Description

technical field [0001] The invention belongs to energy storage devices, and in particular relates to a preparation method of ethylene-vinyl acetate / carbon composite nanofibers and its application in metal-air batteries. Background technique [0002] As a new type of energy conversion and storage technology, metal-air batteries have attracted extensive attention due to their high theoretical specific energy density, secondary cycle ability of some metal-air batteries, low price and environmental friendliness. Traditional solid-state metal-air batteries consist of metal electrodes, solid-state electrolytes, and air electrodes. Among them, the solid electrolyte plays a vital role as the "blood" of the entire device, and the overall service life of the device is almost entirely determined by the solid electrolyte. No matter what kind of solid-state metal-air battery, the main carrier to achieve ion conduction in its electrolyte is the liquid stored in the pores of the electroly...

AI Technical Summary

Problems solved by technology

However, the solid-state electrolyte of the potassium hydroxide system has a big problem in the all-solid-state semi-open metal-air battery, that is, the problem of dehydration of the electrolyte.

When the water loss of the solid electrolyte reaches a certain level, the electrolyte will lose its ability to conduct ions, causing the entire device to be disconnected, thus making it lose its battery effect.

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