Method of manufacturing integrated electrode with three-dimensional conductive network

A conductive network and electrode technology, which is applied in the field of preparation of integrated electrodes, can solve the problems of the limitation of electrode active material diversity and shape diversity, the inability to obtain large-area integrated electrodes, and the complexity of the conductive network construction method, achieving cost reduction. low cost, simple preparation process and high cost

Active Publication Date: 2016-12-21
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The diversity and shape diversity of electrode active materials prepared by these methods are usually limited by the selected substrates, and the obtained electrodes often lack conductive networks or the subsequent conductive network construction methods are relatively complicated, and large-area integrated electrodes cannot be obtained.

Method used

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  • Method of manufacturing integrated electrode with three-dimensional conductive network
  • Method of manufacturing integrated electrode with three-dimensional conductive network
  • Method of manufacturing integrated electrode with three-dimensional conductive network

Examples

Experimental program
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Embodiment 1

[0024] A method for preparing an integrated electrode with a three-dimensional conductive network, using manganese oxide as an active material, polyvinylpyrrolidone with a molecular weight of 1.3 million as a sticky carbon-based compound, and copper foil as a current collector. The synthesis route is as follows figure 1 As shown, the steps are as follows:

[0025] 1) Synthesize manganese trioxide polyhedron (PVP) according to the existing method, refer to J.Phys.Chem.C2007,111,14694, and accurately weigh 0.250g and 0.500 g, transferred to a mortar, added 0.5 mL of deionized water, and ground to obtain a uniformly mixed slurry;

[0026] 2) Apply the uniformly mixed slurry to the surface of the copper foil with a blade coating method, the coating thickness is 30 μm, and dry at room temperature for 24 hours to completely volatilize the water to obtain the integrated electrode precursor;

[0027] 3) Transfer the above-mentioned integrated electrode precursor into a tube furnace a...

Embodiment 2

[0032] A preparation method of an integrated electrode with a three-dimensional conductive network, cobalt carbonate CoCO 3 Co(OH) 2 It is the active material precursor, polyvinylpyrrolidone (PVP) with a molecular weight of 1.3 million is a sticky carbon-based compound, and nickel foam is used as a current collector. The synthetic route is as follows figure 1 As shown, the steps are as follows:

[0033] 1) Accurately weigh 0.500g of PVP and 0.500g of cobalt hydroxide carbonate with the mass ratio of viscous carbon-based compound and active material precursor at 1:1, transfer them to a mortar, add 1mL of deionized water, and grind to obtain a uniform mixture the slurry;

[0034] 2) Coating the uniformly mixed slurry on the surface of nickel foam with a coating thickness of 20 μm, and vacuum drying at 50° C. for 8 hours to completely volatilize the water to obtain the integrated electrode precursor;

[0035] 3) Transfer the above-mentioned integrated electrode precursor into ...

Embodiment 3

[0038] A method for preparing an integrated electrode with a three-dimensional conductive network, using tungsten disulfide (WS 2 ) as the active substance, polyacrylonitrile (PAN) as the sticky carbon-based compound, and copper foil as the current collector, the synthetic route is as follows figure 1 As shown, the steps are as follows:

[0039] 1) Accurately weigh 0.100g PAN and 0.500g tungsten sulfide with the mass ratio of viscous carbon-based compound and active substance at 0.2:1, transfer them to a mortar, add 1.0mL of dimethylformamide (DMF), and grind to obtain uniform slurry;

[0040] 2) The uniformly mixed slurry was coated on the surface of copper foil with a coating thickness of 30 μm by doctor blade coating method, and vacuum-dried at 80 °C for 8 h to completely volatilize DMF to obtain the integrated electrode precursor.

[0041] 3) Transfer the above-mentioned integrated electrode precursor into a tube furnace and heat at 3°C ​​min -1 The heating rate was raise...

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Abstract

The invention discloses a method of manufacturing an integrated electrode with a three-dimensional conductive network, which is formed by connecting an active material and a current collector through a three-dimensional carbon conductive network. A viscous carbon-based compound and the active material or a precursor thereof are grinded into slurry in a solvent, the obtained slurry is uniformly applied to the current collector and then dried to enable the solvent to be completely evaporated, roasting in an inert atmosphere at a temperature of higher than 490 DEG C is then carried out, and an integrated electrode with a three-dimensional conductive network is obtained. The method of the invention has the advantages that the manufacturing method simply, conveniently and effectively constructs the three-dimensional conductive network, and needed electron and ion transport channels during energy storage and conversion processes of the electrode are provided; the diversity and the morphological diversity of active materials in the integrated electrode are broadened, and influences on the active material by a substrate during an electrode construction process can be avoided; and the manufacturing method is high-efficiency, the cost is low, the integrated electrode can be manufactured in a large area, and expandable production is facilitated.

Description

technical field [0001] The invention relates to the field of electrode preparation, in particular to a method for preparing an integrated electrode with a three-dimensional conductive network. Background technique [0002] An integrated electrode refers to an electrode that does not use a binder, the active material is in close contact with the current collector, and can be directly used for energy storage and conversion. This type of electrode usually has the characteristics of an open skeleton structure, a large adhesion force between the active material and the current collector, and no inert binder adhesion, which makes the integrated electrode have a highly stable structure, a large specific surface area, and rich electrical properties. Advantages such as chemical active sites, showing better electrochemical performance than electrodes prepared by conventional methods, have been widely used in lithium / sodium ion batteries, supercapacitors, metal-air batteries, electroca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00H01B3/10
CPCH01B3/10H01B13/0026
Inventor 焦丽芳王一菁曹康哲
Owner NANKAI UNIV
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