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3D grapheneized carbon positive electrode total battery and preparation method thereof

A full battery and carbon alkene technology, which is applied in the manufacture of electrolyte batteries, battery electrodes, secondary batteries, etc., can solve the problem that the key performance of battery specific capacity and specific energy has not been significantly improved, and graphene has high conductivity and high specificity. Surface properties have not been fully utilized and other issues, to achieve the effect of stable and controllable product performance, low manufacturing cost, and simple preparation method

Active Publication Date: 2019-10-01
YANCHENG TEACHERS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can prepare graphene-modified battery electrode active materials with improved performance compared with the original battery, but the high conductivity and high specific surface characteristics of graphene have not been fully utilized, so the specific capacity and specific energy of the battery are critical. No significant improvement in performance

Method used

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  • 3D grapheneized carbon positive electrode total battery and preparation method thereof
  • 3D grapheneized carbon positive electrode total battery and preparation method thereof
  • 3D grapheneized carbon positive electrode total battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] A method for preparing a 3D grapheneized carbon positive electrode full battery includes: (1) Take a piece of flexible expanded graphite paper with a thickness of 0.05 mm and a thickness of 0.05 mm, washing and drying, and acetylene black 96.85%, sodium carboxymethyl cellulose 1.55 % and 1.60% of styrene-butadiene rubber, fully stirred evenly, and adjusted into a paste-like slurry, which is a carbon-containing conductive adhesive slurry; the paste-like slurry is evenly spread on one side of the flexible expanded graphite paper strip, and the covering thickness is 0.08mm carbon-containing conductive adhesive layer 1 (such as figure 2 shown), and then the coated expanded graphite-conductive adhesive sheet was vacuum-dried at room temperature for 5 hours to obtain an expanded graphite-carbon-containing conductive adhesive composite sheet.

[0070] (2) Use the graphite surface 1cm*1cm at one end of the expanded graphite-carbon-containing conductive adhesive composite sheet...

Embodiment 2

[0074] A method for preparing a 3D grapheneized carbon positive electrode full battery in this embodiment is the same as the steps (1), (2) and (4) of Example 1, the difference lies in step (3), which will not be repeated here. Wherein step (3) removes the adhesive tape on expanded graphite-carbon-containing conductive adhesive composite flake graphite battery reaction zone and the tab area, pastes 3 times with adhesive tape on the graphite of battery reaction zone, uses the graphite surface of battery reaction zone 4 as Positive electrode, 10M sulfuric acid solution is the electrolyte solution, the counter electrode is a carbon electrode, the direct current voltage is 2.7V; the current is 0.1mA / cm 2 -1000mA / cm 2 ; After 30 minutes, the graphite on the surface falls off, and the excess graphite is washed away with pure water;

[0075] In this embodiment, a carbon-aluminum two-electrode full battery is assembled, charged by direct current, constant current 5mA to 2.5V, and the...

Embodiment 3

[0077] A method for preparing a 3D grapheneized carbon positive electrode full battery in this embodiment is the same as the steps (1), (2) and (4) of Example 1, the difference lies in step (3), which will not be repeated here. in,

[0078] (3) The adhesive tape on the expanded graphite-carbon-containing conductive adhesive composite sheet graphite battery reaction zone and the tab area is peeled off, and the graphite in the battery reaction zone is pasted 30 times with an adhesive tape, and the graphite surface in the battery reaction zone 4 is used as the positive electrode. The 20M sulfuric acid solution is the electrolyte solution, the counter electrode is a carbon electrode, the DC voltage is 30V; the current is 0.1mA / cm 2 -1000mA / cm 2 ; After 60 minutes, the graphite on the surface falls off, and the excess graphite is washed away with pure water;

[0079] The carbon-aluminum two-electrode full battery assembled in this embodiment is charged by direct current, constant...

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Abstract

The invention relates to a 3D grapheneized carbon positive electrode total battery and a preparation method thereof. The preparation method is characterized by comprising the following steps: taking graphite paper and carbon-containing conductive adhesive as raw materials, coating one side of the graphite paper with a layer of carbon-containing conductive adhesive, and drying and solidifying the carbon-containing conductive adhesive to form a graphite paper and carbon-containing conductive adhesive layer composite electrode material; dividing the other side of the graphite paper into a tab area, a battery reaction area and a third area (the other parts), and coating the third area with hydrophobic adhesive for sealing and solidifying; grapheneizing the battery reaction area, making the battery reaction area form a battery positive electrode through anodic oxidation, forming capacity, and obtaining a grapheneized carbon positive electrode; and assembling a total battery by taking the prepared grapheneized carbon electrode as a positive electrode and an aluminum foil, a magnesium plate, a magnesium alloy plate, a zinc plate or a galvanized composite plate as a negative electrode andinjecting electrolyte. A carbon positive electrode with high specific capacity and a total battery with high specific energy are prepared. The raw materials are widely sourced and low in cost, and thepreparation method is simple and environment-friendly. The product has stable and controllable performance, and is suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of applying graphene carbon materials to batteries or capacitive chemical energy storage. Specifically, the invention relates to a 3D graphene carbon positive electrode full battery and a preparation method thereof. Background technique [0002] Graphene is a newly recognized allotrope of carbon after fullerene and carbon nanotubes. Graphene is a carbon atom with sp 2 A carbon material with a single-layer two-dimensional honeycomb lattice structure formed by hybrid orbital bonding and a six-membered ring structure. This unique structure of graphene brings it a series of novel and special properties, such as colorless and transparent (absorbed light intensity is only 2.3%), high conductivity (single-layer graphene conductivity 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/133H01M4/1393H01M10/054H01M10/058
CPCH01M10/058H01M10/054H01M4/133H01M4/1393Y02P70/50
Inventor 王坚沈浩金叶黄兵焦昌梅
Owner YANCHENG TEACHERS UNIV
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