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Preparation method of a cellulose nanofiber/silk fibroin-based porous nitrogen-doped 2D carbon nanosheet electrode material

A nanofiber, silk fibroin technology, applied in the manufacture of hybrid/electric double layer capacitors, battery electrodes, nanotechnology, etc., can solve problems such as unfavorable material capacity and unfavorable size, achieve low cost, improve cycle life, and facilitate scale the effect of

Inactive Publication Date: 2019-12-13
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method uses many types of raw materials, and it is easy to introduce different types of impurities into the intermediate and final products, which is not conducive to obtaining large and porous carbon nanosheets, and is also not conducive to improving the capacity of the material.

Method used

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  • Preparation method of a cellulose nanofiber/silk fibroin-based porous nitrogen-doped 2D carbon nanosheet electrode material
  • Preparation method of a cellulose nanofiber/silk fibroin-based porous nitrogen-doped 2D carbon nanosheet electrode material
  • Preparation method of a cellulose nanofiber/silk fibroin-based porous nitrogen-doped 2D carbon nanosheet electrode material

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Embodiment 1

[0034] The preparation method of the cellulose nanofiber / silk fibroin-based porous nitrogen-doped 2D carbon nanosheet electrode material of this embodiment comprises the following steps:

[0035] 1) Preparation of cellulose nanofiber suspension and silk fibroin solution

[0036] The bamboo pulp was subjected to TEMPO catalytic oxidation reaction, then ultrasonically dispersed for 10 minutes, and then vacuum rotary concentration was carried out to obtain a suspension of cellulose nanofibers (CNFs), and the mass fraction of cellulose nanofibers (CNFs) in the suspension was 0.8%;

[0037] The degummed silkworm cocoons were dissolved in a LiBr solution with a concentration of 9.3mol / L, and then dialyzed for 3 days using a dialysis bag with a molecular weight cut-off of 3500 to obtain a silk fibroin solution. The mass fraction of silk fibroin in the silk fibroin solution was 7%;

[0038] 2) Preparation of cellulose nanofiber / silk fibroin composite suspension

[0039] The prepared...

Embodiment 2

[0047] The preparation method of the cellulose nanofiber / silk fibroin-based porous nitrogen-doped 2D carbon nanosheet electrode material of this embodiment comprises the following steps:

[0048] 1) Preparation of cellulose nanofiber suspension and silk fibroin solution

[0049] The bamboo pulp was subjected to TEMPO catalytic oxidation reaction, then ultrasonically dispersed for 10 minutes, and then vacuum rotary concentration was carried out to obtain a suspension of cellulose nanofibers (CNFs), and the mass fraction of cellulose nanofibers (CNFs) in the suspension was 1.5%;

[0050] The degummed silkworm cocoons were dissolved in a LiBr solution with a concentration of 9.3mol / L, and then dialyzed for 3 days using a dialysis bag with a molecular weight cut-off of 3500 to obtain a silk fibroin solution. The mass fraction of silk fibroin in the silk fibroin solution was 8%;

[0051] 2) Preparation of cellulose nanofiber / silk fibroin composite suspension

[0052] The prepared...

Embodiment 3

[0060] The preparation method of the cellulose nanofiber / silk fibroin-based porous nitrogen-doped 2D carbon nanosheet electrode material of this embodiment comprises the following steps:

[0061] 1) Preparation of cellulose nanofiber suspension and silk fibroin solution

[0062] The bamboo pulp was subjected to TEMPO catalytic oxidation reaction, then ultrasonically dispersed for 10 minutes, and then vacuum rotary concentration was carried out to obtain a suspension of cellulose nanofibers (CNFs). The mass fraction of cellulose nanofibers (CNFs) in the suspension was 1 %;

[0063] The degummed silkworm cocoons were dissolved in a LiBr solution with a concentration of 9.3mol / L, and then dialyzed for 3 days using a dialysis bag with a molecular weight cut-off of 3500 to obtain a silk fibroin solution. The mass fraction of silk fibroin in the silk fibroin solution was 5%;

[0064] 2) Preparation of cellulose nanofiber / silk fibroin composite suspension

[0065] The prepared silk...

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Abstract

The invention relates to a method for preparing a cellulose nanofiber / silk fibroin-based porous nitrogen-doped 2D carbon nanosheet electrode material, which belongs to the technical field of carbon electrode materials. The preparation method of the cellulose nanofiber / silk fibroin-based porous nitrogen-doped 2D carbon nanosheet electrode material of the present invention comprises the following steps: uniformly mixing the cellulose nanofiber suspension with the silk fibroin solution to obtain a composite suspension; Treat in hydrochloric acid vapor for 1-12h to make cellulose nanofiber / silk fibroin composite hydrogel; freeze in liquid nitrogen for 5-60min and freeze-dry to make composite aerogel; under protective atmosphere, 700-1300 Carbonization at ℃ for 1‑8h, and then activated, that is. The cellulose nanofiber / silk fibroin-based porous nitrogen-doped 2D carbon nanosheet electrode material prepared by the method of the present invention has the characteristics of large size, good flexibility, and porosity, and also has the microstructure of 2D graphene morphology shape.

Description

technical field [0001] The invention relates to a porous nitrogen-doped carbon nanosheet electrode material, in particular to a preparation method of a cellulose nanofiber / silk fibroin-based porous nitrogen-doped 2D carbon nanosheet electrode material, which belongs to the technical field of carbon electrode materials. Background technique [0002] At present, carbon nanomaterials are widely used as electrode materials in new energy storage devices such as supercapacitors, lithium-ion batteries, and nickel-metal hydride batteries. Carbon nanomaterials, as electrode materials for energy storage devices, generally have good electrical conductivity, electrochemical stability, and good processing performance. However, with the development of new energy technologies and industries, energy storage devices have higher and higher requirements for electrode materials. For example, the development of the electric vehicle industry and the new energy storage industry has put forward hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/583H01G11/86H01G11/24H01G11/36H01G11/44B82Y40/00
CPCB82Y40/00H01G11/24H01G11/36H01G11/44H01G11/86H01M4/583Y02E60/10
Inventor 牛庆媛高可政王力臻韩莉锋
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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