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3D (Three-Dimensional) structure electrode and preparation method thereof

A three-dimensional structure and electrode technology, applied in the field of energy storage, can solve the problems of high nitrogen loss rate, complicated preparation process, weak binding force, etc., and achieve the effects of pure quality, increased battery capacity, and low nitrogen loss rate

Inactive Publication Date: 2019-05-28
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention provides a three-dimensional structure electrode and a preparation method thereof, aiming at solving the weak binding force between carbon nitride and three-dimensional matrix graphite felt / carbon felt in existing carbon nitride-containing electrode materials , high nitrogen loss rate, complex preparation process and not environmental protection

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  • 3D (Three-Dimensional) structure electrode and preparation method thereof
  • 3D (Three-Dimensional) structure electrode and preparation method thereof
  • 3D (Three-Dimensional) structure electrode and preparation method thereof

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preparation example Construction

[0034] This embodiment provides a method for preparing a three-dimensional structure electrode, the preparation method comprising the following steps:

[0035] Step 101, placing the nitrogen-containing raw material and the porous three-dimensional matrix on the reaction carrier;

[0036] Step 102, heating the nitrogen-containing raw material and the porous three-dimensional matrix in an inert atmosphere to prepare the three-dimensional structure electrode.

[0037] In the above preparation method including step 101 and step 102, under an inert atmosphere, the nitrogen-containing raw material is used as the precursor of the target product, and after being sublimated by heat, it is deposited on the surface or inside of the porous three-dimensional structure matrix; and reacts in situ under a high temperature environment , and finally obtain a three-dimensional structure electrode without binder. Among them, the inert atmosphere environment can avoid the influence of oxygen, hyd...

specific Embodiment approach 1

[0051] Get an appropriate amount of melamine and spread it on the corundum boat, wherein the specific quantity of melamine is determined according to the design amount of the target product carbon nitride; No contact, the present invention does not limit this; then put the corundum boat in the tube furnace, fill the tube furnace with argon to exclude air, and raise the temperature to 550 °C at a temperature rise rate of 10 °C / min , keep warm for 2 hours, and then take out the corundum boat when the temperature drops to room temperature. Melamine is sublimated to the surface or inside of the graphite felt, and carbon nitride is generated on the surface of the graphite felt or the surface of the internal pores to obtain a three-dimensional structure electrode. The macroscopic photo of the three-dimensional structure electrode as shown in image 3 Shown; The X-ray diffraction pattern of the three-dimensional structure electrode is shown as Figure 4 Shown, the diffraction peak ...

specific Embodiment approach 2

[0052] Get an appropriate amount of urea and lay it flat on the stainless steel boat, wherein the specific quantity of urea is determined according to the design amount of the target product carbon nitride; No contact, the present invention does not limit this; a layer of foamed copper has a specific surface area of ​​2000m 2 / g of activated carbon, and then put the corundum boat in the tube furnace, one end of the tube is closed, and the other end is sealed with water, and the CO formed by the reaction of the carbon and the air in the tube is used as an inert atmosphere, and the temperature rise rate is 5°C / min. The temperature was raised to 300°C, and kept for 0.1 hour, and then the corundum boat was taken out after the temperature dropped to room temperature. Urea generates carbon nitride on the surface of copper foam or the surface of internal pores to obtain a three-dimensional structure electrode.

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Abstract

The invention relates to the technical field of energy storage, provides a 3D (Three-Dimensional) structure electrode and a preparation method thereof, and aims to solve the problems that in an existing carbon nitride-containing electrode material, the binding force between carbon nitride and a matrix material is weak, the nitrogen loss rate is high, and the preparation technology is complicated.The preparation method comprises the following steps: putting a nitrogen-containing raw material and a porous 3D matrix on a reaction carrier; heating the nitrogen-containing raw material and the porous 3D matrix in inert atmosphere, thus obtaining the 3D structure electrode, wherein a binding agent and a solution are not required. The preparation method is different from a method of binding the carbon nitride and graphite felt by utilizing polyvinylidene fluoride as the binding agent in the prior art, and is characterized by heating and drying the nitrogen-containing raw material, sublimatingthe nitrogen-containing raw material to the surface or the inner part of the porous 3D matrix and generating the carbon nitride through in-situ reaction, thus forming the 3D structure electrode. Thebinding force between the carbon nitride and the porous 3D matrix is remarkably enhanced, the nitrogen loss rate is reduced, the preparation technology is simple, and the battery performance can be increased.

Description

technical field [0001] The invention relates to the field of energy storage technology, in particular to a three-dimensional structure electrode and a preparation method thereof. Background technique [0002] The three-dimensional structure electrode has a developed pore structure, a large specific surface area, and many reactive sites, which are conducive to the transfer of reactants and charges, the storage of intermediate products, the surface-interface reaction, and the relief of volume and internal stress changes during the cycle. It has broad application prospects in fields such as batteries and supercapacitors. [0003] Carbon Nitride (C 3 N 4 ) is an inorganic non-metallic ceramic formed by nitrogen and carbon. It has a strong covalent bond, a wide range of raw materials, and a variety of allotropes. Among them, graphite-like carbon nitride g-C 3 N 4 It has a planar two-dimensional sheet structure similar to graphene, and the layers are combined by van der Waals ...

Claims

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Application Information

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IPC IPC(8): C01B21/082
Inventor 王贵欣周川冀越魏云
Owner SICHUAN UNIV
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