A kind of three-dimensional graphene-based nitrogen-doped porous carbon composite electrode material and preparation method thereof

A composite electrode and alkenyl nitrogen technology, applied in the field of materials science, can solve the problems of weakening electrochemical activity and hindering electron transfer, so as to achieve the effect of highlighting the cycle ability and shortening the transportation path

Active Publication Date: 2018-09-28
上海德朗能电池有限公司
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  • Description
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  • Application Information

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Problems solved by technology

However, the nitrogen-doped porous carbon currently studied in the laboratory also has certain defects. The porous carbon skeleton of NPC introduced by the huge defects in the manufacturing process will inevitably hinder electron transfer and weaken its electrochemical activity; if it will have a three-dimensional macroporous structure Combining graphene airgel with nitrogen-doped porous carbon, the resulting combination of hierarchically porous NPC-GAs will greatly facilitate their electrochemical applications

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  • A kind of three-dimensional graphene-based nitrogen-doped porous carbon composite electrode material and preparation method thereof
  • A kind of three-dimensional graphene-based nitrogen-doped porous carbon composite electrode material and preparation method thereof
  • A kind of three-dimensional graphene-based nitrogen-doped porous carbon composite electrode material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0030] A preparation method of an NPC-GAs three-dimensional hierarchical structure electrode material, comprising the steps of:

[0031] (1) Graphene oxide (GO) was prepared by the modified Hummers method, and the synthesis steps included pre-oxidation and secondary oxidation.

[0032] (2) Preparation of graphene airgel (GAs):

[0033] a. Take 0.6g of polyoxyethylene polyoxypropylene block copolymer (F-127) in a 100mL beaker, add 20mL of deionized water, and sonicate for 3h until F-127 (400mg) is completely dissolved;

[0034] b. Add 100mg of graphene to the 100mL beaker in step a, add deionized water to 50mL and stir evenly;

[0035] c. Transfer the above solution to a 100mL hydrothermal kettle, carry out hydrothermal reaction, and react at 175°C for 16h;

[0036] d. The block solid sample obtained is put into a glass cup and put into a freeze dryer for vacuum drying;

[0037] e. Take out the dried sample, put it into a nitrogen furnace for burning, protect the whole proce...

Embodiment 2

[0045] A preparation method of an NPC-GAs three-dimensional hierarchical structure electrode material, comprising the steps of:

[0046] (1) Graphene oxide (GO) was prepared by the modified Hummers method, and the synthesis steps included pre-oxidation and secondary oxidation.

[0047] (2) Preparation of graphene airgel (GAs):

[0048] a. Take 0.6g F-127 in a 100mL beaker, add 20mL deionized water, and sonicate for 3h until F-127 (500mg) is completely dissolved;

[0049]b. Add 100mg of graphene to the 100mL beaker in step a, add deionized water to 50mL and stir evenly;

[0050] c. Transfer the above solution to a 100mL hydrothermal kettle, carry out hydrothermal reaction, and react at 180°C for 17h;

[0051] d. The block solid sample obtained is put into a glass cup and put into a freeze dryer for vacuum drying;

[0052] e. Take out the dried sample, put it into a nitrogen furnace for burning, protect the whole process with nitrogen, raise the temperature to 680°C at a rate...

Embodiment 3

[0060] A preparation method of an NPC-GAs three-dimensional hierarchical structure electrode material, comprising the steps of:

[0061] (1) Graphene oxide (GO) was prepared by the modified Hummers method, and the synthesis steps included pre-oxidation and secondary oxidation.

[0062] (2) Preparation of graphene airgel (GAs):

[0063] a. Take 0.6g F-127 in a 100mL beaker, add 20mL deionized water, and sonicate for 3h until F-127 (500mg) is completely dissolved;

[0064] b. Add 100mg of graphene to the 100mL beaker in step a, add deionized water to 50mL and stir evenly;

[0065] c. Transfer the above solution to a 100mL hydrothermal kettle, carry out hydrothermal reaction, and react at 180°C for 18h;

[0066] d. The block solid sample obtained is put into a glass cup and put into a freeze dryer for vacuum drying;

[0067] e. Take out the dried sample, put it into a nitrogen furnace for burning, protect the whole process with nitrogen, raise the temperature to 700°C at a rat...

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Abstract

The invention discloses a three-dimensional graphene-based nitrogen-doped porous carbon composite electrode material and a preparation method thereof. The method comprises the following steps: treating graphene oxide (GO) which is taken as a raw material by a hydrothermal method to obtain graphene hydrogel, and performing high-temperature treatment on the graphene hydrogel to obtain graphene aerogel (GAs); and compounding m-phenylenediamine (mPD) which is taken as a carbon source with the graphene aerogel, and performing high-temperature treatment on the compound to obtain NPC-Gas. The three-dimensional graphene-based nitrogen-doped porous carbon NPC-GAs composite material obtained by the hydrothermal method and the high-temperature treatment method has a large specific surface area and a superior circulation capability. Moreover, surface stored charges react rapidly through doping of carbon and nitrogen, so that a transportation path is shortened. The three-dimensional graphene-based nitrogen-doped porous carbon composite electrode material is one of ideal energy materials, and can be taken as an electrode material.

Description

technical field [0001] The invention belongs to the technical field of materials science, and relates to a three-dimensional hierarchical structure composite electrode material, specifically a three-dimensional graphene-based nitrogen-doped porous carbon composite material (NPC-GAs) and a preparation method thereof. Background technique [0002] With the rapid development of society, energy and environment are two major issues facing the sustainable development of human beings. With the gradual depletion of non-renewable energy sources such as oil, natural gas, and coal, renewable clean energy sources are developing rapidly. While new energy sources are widely developed, there is also a key problem that needs to be solved urgently: how to effectively store and convert these energies such as solar energy, wind energy and thermal energy. Therefore, energy storage technology has become a key link in the development of the new energy industry, and it is particularly important t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/26H01G11/32H01G11/38H01G11/86
CPCY02E60/13
Inventor 蔺华林陈达明陈红艳常兴韩生王驰刘平周嘉伟薛原赵志成许广文
Owner 上海德朗能电池有限公司
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