Preparing method of nanometer active carbon fiber

Abstract

The invention belongs to the field of nanometer materials and relates to a preparing method of nanometer active carbon fiber to solve the problems that an existing nanometer active carbon fiber preparing technology is tedious and high in cost. The method comprises the steps that standby bacterial cellulose is prepared; potassium hydroxide / bacterial cellulose is prepared; a potassium hydroxide / bacterial cellulose precursor is prepared; the potassium hydroxide / bacterial cellulose precursor is placed in a tube furnace to be subjected to high-temperature pyrolysis, and then the nanometer active carbon fiber is obtained. According to the preparing method of the nanometer active carbon fiber, the potassium hydroxide / bacterial cellulose serves as the precursor, the nanometer active carbon fiber is prepared through one step, scale production can be achieved, the number of process steps is reduced, the method is simple, energy saving is achieved, and raw materials are environmentally friendly, low in price and easy to obtain. By means of two times of freeze drying, hydrolysis of the bacterial cellulose is avoided, and meanwhile the microstructure of the bacterial cellulose is not destroyed. The obtained nanometer active carbon fiber is used as an electrode material of a supercapacitor and has very good capacitance characteristics.

Description

technical field [0001] The invention relates to a preparation method of nano activated carbon fibers. Background technique [0002] At present, electrochemical capacitors have good application prospects in the fields of hybrid electric vehicles, electric vehicles and backup power supplies, and have attracted much attention. The carbon-based electrode materials that have been commercialized for electrochemical capacitors are mainly activated carbon and activated carbon fibers. Activated carbon fiber materials have the advantages of high mass specific capacity, good electrical conductivity, excellent strength and good cycle performance, and are favored. However, the preparation methods of activated carbon nanofiber materials mainly include physical activation and chemical activation. First, carbon fibers are prepared from polyacrylonitrile, viscose, etc. as precursors, and then further activated. The physical activation method usually uses oxidizing gases such as carbon dio...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing nano-activated carbon fibers in order to solve the problems of cumbersome preparation process and high cost of existing nano-activated carbon fibers

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