Preparing method of nanometer active carbon fiber

An activated carbon fiber and nanotechnology, applied in nanotechnology, climate sustainability, sustainable manufacturing/processing, etc., can solve the problems of high cost and cumbersome preparation process of nanometer activated carbon fiber, avoid hydrolysis, environmental protection, cheap and easy to obtain raw materials , The method is simple and the effect of energy saving

Inactive Publication Date: 2015-11-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Preparing method of nanometer active carbon fiber
  • Preparing method of nanometer active carbon fiber
  • Preparing method of nanometer active carbon fiber

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specific Embodiment approach 1

[0019] Specific embodiment one: the preparation method of a kind of nano-activated carbon fiber of present embodiment, carry out as follows:

[0020] 1. Soak bacterial cellulose in deionized water and ultrasonically wash it, then freeze it with liquid nitrogen and freeze-dry it for 15-30 hours to obtain spare bacterial cellulose;

[0021] 2. Soak the spare bacterial cellulose in an aqueous potassium hydroxide solution and absorb to saturation to obtain potassium hydroxide / bacterial cellulose;

[0022] 3. Freeze-dry the potassium hydroxide / bacterial cellulose with liquid nitrogen for 40 hours to obtain the potassium hydroxide / bacterial cellulose precursor;

[0023] 4. Put the potassium hydroxide / bacterial cellulose precursor in a tube furnace for high-temperature pyrolysis to obtain nano-activated carbon fibers.

[0024] Bacterial cellulose in this embodiment is a commercially available product.

[0025] This embodiment uses potassium hydroxide / bacterial cellulose as a precur...

specific Embodiment approach 2

[0026] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the bacterial cellulose is bacterial cellulose leftovers. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0027] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the condition of the ultrasonic cleaning in step 1 is ultrasonic time of 10 hours, and the deionized water is replaced every hour. Others are the same as in the first or second embodiment.

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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...

Claims

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Application Information

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IPC IPC(8): C01B31/12B82Y40/00
CPCY02P20/10
Inventor 袁国辉刘荣张芳平张法宁黄书黎恩源
Owner HARBIN INST OF TECH
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