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Preparation method of porous nitrogen-doped graphene/carbon nanotube composite conductive agent

A nitrogen-doped graphene and carbon nanotube composite technology, applied in circuits, electrical components, battery electrodes, etc., can solve the problems of restricting the pace of industrial applications, high cost, and high energy consumption, and achieve excellent three-dimensional conductive network structure, Convenient and easy to obtain fecundity, the effect of mild reaction conditions

Inactive Publication Date: 2017-08-11
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of the above-mentioned traditional nitrogen-doped graphene and porous graphene preparation methods have high energy consumption, complicated process, serious pollution, and high cost, which greatly limit their industrial application.

Method used

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  • Preparation method of porous nitrogen-doped graphene/carbon nanotube composite conductive agent
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Effect test

Embodiment 1

[0037] Such as figure 1 As shown, the method for preparing a porous nitrogen-doped graphene / carbon nanotube composite conductive agent of the present invention includes the following steps:

[0038] Step 1: Graphene hole making

[0039] Firstly, the 1L seed expansion culture solution was divided into 4 sterilized 1L Erlenmeyer flasks, and the culture solution in each Erlenmeyer flask was 250mL. Phanerochaete chrysosporium spore suspension 1×10 7 CFU, 2mL were inoculated into 250mL seed expansion culture solution, aerobic culture, placed in a constant temperature shaking incubator at 150r / min, 30℃ for 2d to obtain 2×10 7 CFU seed liquid.

[0040] Then, 5 mL, 1 mg / mL graphene oxide suspension and 20 mL seed solution prepared by Hummers chemical method were added to 250 mL nutrient-restricted culture solution, and incubated at 29° C. and 160 r / min with constant temperature shaking for 5 days. After the culture solution was filtered by suction, the filter cake was dispersed in 100 mL of...

Embodiment 2

[0045] The method for preparing a porous nitrogen-doped graphene / carbon nanotube composite conductive agent of the present invention includes the following steps:

[0046] Step 1: Graphene hole making

[0047] First, prepare 1L of seed expansion culture medium, and divide it into 4 sterilized 1L Erlenmeyer flasks, each of which contains 250mL of culture medium. Phanerochaete chrysosporium spore suspension 5×10 6 CFU, 2mL were inoculated into 250mL seed expansion culture solution, aerobic culture, placed in a constant temperature shaking incubator at 160r / min, 28℃ for 3d, to obtain 1×10 7 CFU seed liquid.

[0048] Then prepare 1L of liquid nutrient-restricted medium, add 5mL, 2mg / mL graphene oxide suspension and 25mL seed liquid prepared by Hummers chemical method to 250mL of nutrient-restricted medium, culture at 30℃, 160r / min constant temperature shaking for 5 days. After the culture solution was filtered by suction, the filter cake was dispersed in 50 mL of water, and heated to 45...

Embodiment 3

[0052] The method for preparing a porous nitrogen-doped graphene / carbon nanotube composite conductive agent of the present invention includes the following steps:

[0053] Step 1: Graphene hole making

[0054] First, prepare 1L of seed expansion culture medium, and divide it into 4 sterilized 1L Erlenmeyer flasks, each of which contains 250mL of culture medium. Phanerochaete chrysosporium spore suspension 2×10 7 CFU, 2mL were inoculated into 250mL seed expansion culture medium, aerobic culture, placed in a constant temperature shaking incubator at 120r / min, 31℃ for 3d, to obtain 1.5×10 8 CFU seed liquid.

[0055] Then prepare 1L of liquid nutrient-restricted medium, add 10mL, 2mg / mL graphene oxide suspension and 20mL seed liquid prepared by Hummers chemical method to 250mL nutrient-restricted culture medium, and culture at 31℃, 130r / min constant temperature shaking for 5 days. After the culture broth was filtered by suction, the filter cake was dispersed in 30 mL of water, and heate...

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Abstract

The invention discloses a preparation method of a porous nitrogen-doped graphene / carbon nanotube composite conductive agent. The preparation method comprises the steps of inoculating phanerochaete chrysosporium into a seed expansion culture solution for aerobic culture to obtain a seed liquid; adding the seed liquid and a graphene suspension liquid into a nutrition limitation culture solution, and dispersing the product subjected to constant-temperature shaking culture and processing in deionized water to obtain a nanopore graphene oxide suspension liquid; mixing the product and a carbon nanotube suspension liquid, performing ultrasonic processing, adding the mixed suspension liquid to an anaerobic denitrifying bacteria culture solution, and inoculating denitrifying bacteria seed liquid for anaerobic culture to obtain the porous nitrogen-doped graphene / carbon nanotube composite conductive agent. A two-step green preparation method is employed, a toxic reagent is not used, the preparation method has the advantages of moderate and controllable reaction process and low cost, and is easy to promote, and the prepared porous nitrogen-doped graphene / carbon nanotube composite conductive agent can be widely applied into the fields of a lithium ion battery and the like.

Description

Technical field [0001] The invention relates to a preparation method of graphene / carbon nanotube conductive agent, in particular to a green preparation method of porous nitrogen-doped graphene / carbon nanotube. Background technique [0002] Two-dimensional graphene and one-dimensional carbon nanotubes are widely used in the fields of lithium-ion battery conductive agents due to their excellent electrical conductivity, thermal conductivity, mechanical and mechanical properties. Compared with the traditional artificial graphite KS-6, it has an amount Low, significantly improved conductivity and other advantages. At the same time, the composite material of graphene and carbon nanotubes, because it can construct a good three-dimensional conductive network, has attracted more and more attention from researchers and engineers, and is gradually applied to the fields of lithium ion battery conductive agents. Recently, N-doped graphene is prepared into N-doped graphene, which can be appli...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M10/0525
CPCH01M4/625H01M10/0525Y02E60/10
Inventor 朱春林杨尘汪涛王金龙段锐
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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