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A controllable preparation method of biomass gel-based hierarchically porous ordered three-dimensional network structure carbon materials

A network structure and biomass technology, which is applied in the field of controllable preparation of biomass gel-based multi-level porous ordered three-dimensional network structure carbon materials, can solve the problem of reducing the order and integrity of the pore structure and the easy collapse of the three-dimensional nanostructure , pore blockage and other problems, achieving good application prospects, excellent electrochemical performance, and stable structure

Active Publication Date: 2022-06-24
HENAN NORMAL UNIV
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Problems solved by technology

[0003] The raw materials such as phenols and aldehydes used to prepare carbon aerogels are toxic and corrosive. In addition, the three-dimensional nanostructure of the original resin gel is easy to collapse during the preparation process of phenolic resin carbon gels, causing channel blockage and reducing the stability of the channel structure. order and completeness

Method used

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  • A controllable preparation method of biomass gel-based hierarchically porous ordered three-dimensional network structure carbon materials
  • A controllable preparation method of biomass gel-based hierarchically porous ordered three-dimensional network structure carbon materials
  • A controllable preparation method of biomass gel-based hierarchically porous ordered three-dimensional network structure carbon materials

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Experimental program
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Effect test

Embodiment 1

[0032] (1) 4.0 g of acrylamide, 0.466 g of aniline, 100 µL of acrylic acid, 1.0 g of polyvinylpyrrolidone, 272 µL of N,N'-methylenebisacrylamide, and 2-hydroxy-4'-(2-hydroxyethoxy) - 0.265g of 2-methylpropiophenone was added to 14mL of pure water, and a homogeneous solution A was formed by continuous stirring;

[0033] (2) 5.935g of soluble starch was added to 20mL of pure water, heated to 75°C under constant stirring until a uniform and transparent solution B was formed, and cooled to room temperature naturally for use;

[0034] (3) Add solution A to solution B, form a transparent mixed solution under magnetic stirring, pass nitrogen for 15 min, irradiate with ultraviolet light until polyacrylamide gel is formed, and then dry at low temperature to form polyacrylamide gel / starch double network gel;

[0035] (4) The polyacrylamide gel / starch xerogel was immersed in a hydrochloric acid solution containing ammonium persulfate, and oxidized at 4 °C for 12 h to obtain polyacrylami...

Embodiment 2

[0039] (1) 4.0 g of acrylamide, 0.466 g of aniline, 100 µL of acrylic acid, 1.0 g of polyvinylpyrrolidone, 272 µL of N,N'-methylenebisacrylamide, and 2-hydroxy-4'-(2-hydroxyethoxy) - 0.265g of 2-methylpropiophenone was added to 14mL of pure water, and a homogeneous solution A was formed by continuous stirring;

[0040] (2) 5.935g of soluble starch was added to 20mL of pure water, heated to 75°C under constant stirring until a uniform and transparent solution B was formed, and cooled to room temperature naturally for use;

[0041] (3) Add solution A to solution B, form a transparent mixed solution under magnetic stirring, pass nitrogen for 15 min, irradiate with ultraviolet light until polyacrylamide gel is formed, and then dry at low temperature to form polyacrylamide gel / starch double network gel;

[0042] (4) The polyacrylamide gel / starch xerogel was immersed in a hydrochloric acid solution containing ammonium persulfate, and oxidized at 4 °C for 12 h to obtain polyacrylami...

Embodiment 3

[0047] (1) 4.0 g of acrylamide, 0.466 g of aniline, 100 µL of acrylic acid, 1.0 g of polyvinylpyrrolidone, 272 µL of N,N'-methylenebisacrylamide, and 2-hydroxy-4'-(2-hydroxyethoxy) - 0.265g of 2-methylpropiophenone was added to 14mL of pure water, and a homogeneous solution A was formed by continuous stirring;

[0048] (2) 5.935g of soluble starch was added to 20mL of pure water, heated to 75°C under constant stirring until a uniform and transparent solution B was formed, and cooled to room temperature naturally for use;

[0049] (3) Add solution A to solution B, form a transparent mixed solution under magnetic stirring, pass nitrogen for 15 min, irradiate with ultraviolet light until polyacrylamide gel is formed, and then dry at low temperature to form polyacrylamide gel / starch double network gel;

[0050] (4) The polyacrylamide gel / starch xerogel was immersed in a hydrochloric acid solution containing ammonium persulfate, and oxidized at 4 °C for 12 h to obtain polyacrylami...

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Abstract

The invention discloses a controllable preparation method of a biomass gel-based multi-level porous ordered three-dimensional network structure carbon material. ‑Hydroxy‑4'‑(2‑hydroxyethoxy)‑2‑methylpropiophenone and soluble starch to prepare polyacrylamide / starch / polyaniline triple network gel; pyrolyze in a tube furnace at 700°C Treat to obtain carbon gel; mix carbon gel with solid KOH, soak in water and dry to obtain carbon gel / KOH mixture; activate for 2 hours under the protection of inert gas at 600-800°C to obtain crude product; put the crude product into hydrochloric acid solution Soaking in medium and drying to prepare carbon supercapacitor electrode materials with ordered three-dimensional network structure of multi-level pores. The series of supercapacitor electrode materials prepared by the invention are high-level carbon materials with multi-level pores and three-dimensional nanostructure nitrogen and oxygen co-doping, and are used for supercapacitors to exhibit excellent electrochemical performance.

Description

technical field [0001] The invention belongs to the technical field of preparation of supercapacitor electrode materials, in particular to a controllable preparation method of a biomass gel-based hierarchical porous ordered three-dimensional network structure carbon material. Background technique [0002] Electrochemical storage and conversion devices are an important part of new energy technology, which can efficiently store the energy generated by wind energy, photovoltaics and biomass power generation for subsequent applications, and solve the problem of continuous, stable and efficient operation of new energy storage networks. As a new type of electrochemical storage and conversion device, supercapacitors have been recognized as having great application prospects in the field of energy storage and conversion due to their high power density, long life, and fast charge-discharge performance. widespread concern in the business world. At present, most commercial supercapaci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/318C01B32/348H01G11/24H01G11/44H01G11/86
CPCC01B32/318C01B32/348H01G11/24H01G11/44H01G11/86Y02E60/13
Inventor 魏献军代冬梅魏济时
Owner HENAN NORMAL UNIV
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