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A preparation method of porous nitrogen-doped carbon material based on fungal biomass and application thereof

A nitrogen-doped carbon and biomass technology, applied in carbon preparation/purification, hybrid/electric double-layer capacitor manufacturing, hybrid capacitor electrodes, etc., can solve the problem of uncontrollable doping ratio, etc. , excellent electrochemical performance, the effect of increased conductivity

Active Publication Date: 2018-12-11
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since this method does not do heteroatom doping to the carbon material, the maximum specific capacitance obtained in the aqueous electrolyte is only 241F g -1
Document 1 (Environ.Sci.Technol.2016,50,12421-12428) prepared nitrogen and phosphorus double-doped activated carbon, but the maximum specific capacitance was only 257F g -1 And they use the nitrogen and phosphorus elements contained in the biomass itself, and the doping ratio is uncontrollable

Method used

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  • A preparation method of porous nitrogen-doped carbon material based on fungal biomass and application thereof
  • A preparation method of porous nitrogen-doped carbon material based on fungal biomass and application thereof
  • A preparation method of porous nitrogen-doped carbon material based on fungal biomass and application thereof

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Experimental program
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Effect test

Embodiment 1

[0037] (1) Collect the fungal cells that accumulate oil, and inoculate C. chinensis, which was purchased from the China General Microbial Culture Collection and Management Center, in a sterile fermentation medium with glucose as the sole carbon source and cultivate for 20 hours, and filter and separate. , the microbial cells obtained by filtration are washed 3 times with deionized water and freeze-dried to obtain oil-producing fungal cells that accumulate grease,

[0038] Described bacterial fermentation medium is glucose 80g / L, (NH 4 ) 2 SO 4 3g / L, MgSO 4 ·7H 2 O 3g / L, KH 2 PO 4 1g / L.

[0039] (2) take by weighing 1g the fungal thalline and urea of ​​accumulating grease collected through step 1 and add in potassium hydroxide solution to obtain mixed solution, wherein the fungal thalline of accumulating grease: potassium hydroxide: urea is 1:1:1, After soaking and activation for 1 h, the mixture was freeze-dried in vacuum to obtain a dry product.

[0040] (3) Put the dr...

Embodiment 2

[0045] (1) Collect the fungal cells that accumulate grease, and inoculate the C. chinensis, which was purchased from the China General Microbial Culture Collection and Management Center, in a sterile fermentation medium with glucose as the sole carbon source and cultivate for 22 hours, and filter and separate. , the microbial cells obtained by filtration are washed 3 times with deionized water and freeze-dried to obtain oil-producing fungal cells that accumulate grease,

[0046] Described bacterial fermentation medium is glucose 80g / L, (NH 4 ) 2 SO 4 3g / L, MgSO 4 ·7H 2 O 3g / L, KH 2 PO 4 1g / L.

[0047] (2) take by weighing the fungal thalline of the accumulated grease collected by step 1, urea adds in the potassium hydroxide solution to obtain a mixed solution, and wherein the fungal thalline of accumulated grease: potassium hydroxide: urea is 1:1.5:1.5, After soaking and activation for 1 h, the mixture was freeze-dried in vacuum to obtain a dry product.

[0048] (3) P...

Embodiment 3

[0053] (1) Collect the fungal cells of accumulating oil, collect the fungal cells that accumulate oil, and inoculate the fungal cells of C. chinensis purchased from the China General Microbial Culture Collection and Management Center in a sterile fermentation with glucose as the only carbon source Cultivated in the medium for 24h, filtered and separated, washed the filtered cells 3 times with deionized water, and freeze-dried to obtain oil-producing fungal cells that accumulated oil.

[0054] Described bacterial fermentation medium is glucose 80g / L, (NH 4 ) 2 SO 4 3g / L, MgSO 4 ·7H 2 O 3g / L, KH 2 PO 4 1g / L.

[0055] (2) take by weighing the fungal thalline of 1g accumulating oil and fat collected through step 1, urea is added in potassium hydroxide solution to obtain mixed solution, wherein the fungal thalline of accumulating oil and fat: potassium hydroxide: urea is 1:1:1, soaking After activation for 1 h, the mixture was freeze-dried in vacuo to obtain a dry product. ...

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Abstract

The invention belongs to the preparation field of biomass carbon material, in particular discloses a preparation method and application of porous nitrogen doped carbon material based on fungal biomass. The preparation method comprises the following steps of: adding urea into potassium hydroxide solution to obtain mixed solution, reacting, drying the mixed solution to obtain dried product, carbonizing the dried product in an inert atmosphere to obtain carbonized product, purifying, and obtaining porous nitrogen doped carbon material; In the mixed liquor, the mass ratio of the fungal cell accumulating oil to potassium hydroxide to urea is 1: 1; and the mass ratio of the fungal cell accumulating oil to urea is 1: 1. 2: 1- 2. As that method of the invention is simple in operation, low in costand easy to regulate the nitrogen element dope ratio, the prepared porous carbon material has good electrochemical properties such as high specific capacitance, stable rate performance and the like, and therefore has good application prospects in the field of supercapacitors and energy storage.

Description

technical field [0001] The invention belongs to the field of preparation of biomass carbon materials, in particular to a preparation method and application of a porous nitrogen-doped carbon material based on fungal biomass. Background technique [0002] As a new type of electrochemical energy conversion and energy storage device, supercapacitors have the characteristics of high power density and energy density, wide operating temperature range and good cycle stability, and are widely used in commercial and industrial fields. As the core components of supercapacitors, electrode materials play a crucial role in their performance. Biomass porous carbon materials have become a hot spot in the research of supercapacitor electrode materials due to their wide source, low price, rich pore structure, huge specific surface area, good electrical conductivity, and stable chemical properties. Among them, fungal biomass is not only abundant and fast growing, but also rich in chitin, whic...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/38H01G11/44H01G11/86C01B32/05
CPCC01B32/05H01G11/24H01G11/30H01G11/38H01G11/44H01G11/86Y02E60/13
Inventor 石岩刘丹司梦莹陶冶刘明人张可菁颜旭柴立元杨志辉
Owner CENT SOUTH UNIV
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