A 3D graphene carbon electrode, preparation method and full battery

A technology of graphene treatment and carbonization, which is applied in the manufacture of electrolyte storage batteries, non-aqueous electrolyte storage batteries, lithium storage batteries, etc. The specific capacity performance index of chemical energy storage devices does not fully exploit the problems of graphene's large specific surface and high conductivity, and achieves the effects of stable and controllable product performance, low manufacturing cost and low cost.

Active Publication Date: 2022-07-01
YANCHENG TEACHERS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still many limitations in the direct use of graphene in the field of energy storage. The properties of graphene such as large specific surface area and high conductivity have not been fully utilized, and the performance of key technologies such as specific capacity and specific energy of chemical energy storage devices have not been significantly improved. index, so the preparation and application of graphene energy storage devices has become a hot spot in scientific research in recent years
[0003] To sum up, the current technology of graphene in the field of chemical energy storage applications cannot meet the basic requirements of industrialization such as simple preparation methods, low cost, stable and controllable product performance, especially the excellent properties of graphene such as high conductivity and high specific surface area cannot be fully utilized. Therefore, it greatly limits the wider industrial application of graphene in the field of chemical energy storage

Method used

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  • A 3D graphene carbon electrode, preparation method and full battery
  • A 3D graphene carbon electrode, preparation method and full battery
  • A 3D graphene carbon electrode, preparation method and full battery

Examples

Experimental program
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Embodiment 1

[0040] A preparation method of a 3D graphene carbon electrode comprises: (1) taking a piece of flexible expanded graphite paper strip with a thickness of 1cm*3cm and a thickness of 0.05mm, washing and drying, and mixing 96.85% acetylene black and 1.55% sodium carboxymethylcellulose % and styrene-butadiene rubber 1.60%, fully stirred, and adjusted into a paste-like carbon-containing conductive paste; the paste-like carbon-containing conductive paste was evenly spread on one side of the graphite paper strip, and the thickness of the laying was 0.08mm. like figure 2 As shown in the figure, a carbon-containing conductive adhesive layer 1 is formed, and then the coated expanded graphite-carbon-containing conductive adhesive sheet is vacuum-dried at room temperature for 5 hours to obtain a composite electrode material sheet of expanded graphite-carbon-containing conductive adhesive;

[0041] (2) Laminate the electrode material sheet of expanded graphite-carbon-containing conductive...

Embodiment 2

[0045] In this embodiment, in a method for preparing a 3D graphene carbon electrode, steps (1) and (2) are the same as those in Embodiment 1, and are not repeated here. The difference is in step (3).

[0046] Among them, (3) as figure 2 As shown, peel off the tape on the electrode material sheet graphite battery reaction surface 4 and the tab region 2 of the expanded graphite-carbon-containing conductive adhesive composite, and stick the tape on the graphite on the battery reaction surface 4 for 3 times, and the battery reaction surface The graphite surface of 4 is used as the positive electrode, the 10M sulfuric acid solution is the electrolyte solution, the counter electrode is the carbon electrode, and the direct current voltage is 2.7V; the current is 0.1mA / cm 2 -1000mA / cm 2 ; Time 30min, the surface graphite falls off, and the excess graphite is rinsed with pure water. That is, the micromechanical exfoliation and the electrochemical expansion treatment are respectivel...

Embodiment 3

[0049] In this embodiment, the steps (1), (2) and (3) of a method for preparing a 3D graphene carbon electrode are the same as those in Embodiment 1, and are not repeated here.

[0050] This embodiment also includes a method for preparing a full battery composed of 3D graphene carbon electrodes, such as Figure 4 As shown, the above-mentioned 3D graphene electrode formed is used as the battery positive electrode 5, the sulfuric acid solution of 5M is the electrolyte solution 9, the other grapheneized carbon electrode of the counter electrode is the negative electrode 6, and the reference electrode is the mercurous sulfate electrode 8. A carbon-carbon three-electrode full battery is formed in the beaker, which is charged with direct current relative to the mercurous sulfate electrode 8, such as Figure 7 As shown, constant current 1mA charging up to 1.437V, constant voltage 1.437V charging 30min, current 0.1mA / cm 2 -1000mA / cm 2 , the constant current discharge current is 0.1m...

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Abstract

The invention relates to the application of graphene carbon materials to the technical field of batteries or capacitive chemical energy storage, in particular to a 3D graphene carbon electrode, a preparation method and a full battery. Using graphite paper as raw material, carbon-containing conductive adhesive is coated on one side of the graphite paper, dried and cured to form an electrode material compounded with carbon-containing conductive adhesive and graphite paper; part of the other side of the graphite paper is grapheneized to form 3D graphene carbon electrodes. The invention prepares a high specific capacity carbon positive electrode and a full battery with the characteristics of a super battery; the raw material sources are wide, the cost is low, the preparation method is simple and environmentally friendly; the product performance is stable and controllable, and is suitable for industrial production.

Description

technical field [0001] The invention relates to the application of graphene carbon materials to the technical field of batteries or capacitive chemical energy storage, in particular to a 3D graphene carbon electrode, a preparation method and a full battery. Background technique [0002] Graphene is a newly recognized allotrope of carbon after fullerenes and carbon nanotubes. Graphene is a carbon atom with sp 2 Hybrid orbitals are bonded to form a single-layer two-dimensional honeycomb lattice structure carbon material with a six-membered ring structure. This unique structure of graphene brings it a series of novel and special properties, such as colorless and transparent (absorbing light intensity of only 2.3%), high electrical conductivity (the conductivity of single-layer graphene is similar to that of copper), Excellent mechanical properties (tensile strength can reach 50-200GPa, elastic modulus can reach 1TPa, the tensile strength of single-layer graphene is 100 times ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/133H01M4/1393H01M4/587H01M10/052H01M10/0525H01M10/058
CPCH01M4/1393H01M4/133H01M10/058H01M10/052H01M10/0525H01M4/587Y02P70/50
Inventor 王坚沈浩金叶黄兵焦昌梅
Owner YANCHENG TEACHERS UNIV
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