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Preparation of stainless steel mesh loaded feco by hydrothermal method 3 Negative plate method

A technology of stainless steel mesh and negative electrode sheet, which is applied in the direction of battery electrodes, structural parts, electrical components, etc., can solve cumbersome problems, achieve simple process flow, large specific surface area, and save the effect of slurry preparation and smearing process

Active Publication Date: 2020-09-11
东莞市华东环保设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When ferrous carbonate is used as the negative electrode material to prepare the negative electrode sheet of the battery, it needs to go through processes such as pulping, coating and rolling, which is relatively cumbersome

Method used

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  • Preparation of stainless steel mesh loaded feco by hydrothermal method <sub>3</sub> Negative plate method
  • Preparation of stainless steel mesh loaded feco by hydrothermal method <sub>3</sub> Negative plate method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Preparation of Stainless Steel Mesh Supported FeCO by Hydrothermal Method 3 The method for negative electrode sheet, comprises the following steps:

[0019] a. Take the stainless steel mesh and first boil and corrode it with a dilute acid solution, then ultrasonically clean and dry it with deionized water to obtain a stainless steel mesh substrate with a clean surface, put it into a hydrothermal reaction kettle, and set it aside;

[0020] b. Add hexamethylenetetramine while stirring in deionized water, call HCl solution pH≤7, then add polyethylene glycol, mix well and add FeCl 2 4H 2 O, after mixing evenly, the reaction precursor solution is obtained; the degree of polymerization of polyethylene glycol is 600, and the amount of polyethylene glycol added is 1 / 4 of the weight of deionized water; FeCl 2 4H 2 The amount of O added is 1 / 100 of the weight of deionized water in step 1;

[0021] c. Pour the reaction precursor solution into the hydrothermal reaction kettle i...

Embodiment 2

[0023] Preparation of Stainless Steel Mesh Supported FeCO by Hydrothermal Method 3 The method for negative electrode sheet, comprises the following steps:

[0024] a. Take the stainless steel mesh and first boil and corrode it with a dilute acid solution, then ultrasonically clean and dry it with deionized water to obtain a stainless steel mesh substrate with a clean surface, put it into a hydrothermal reaction kettle, and set it aside;

[0025] b. Add hexamethylenetetramine while stirring in deionized water, call HCl solution pH≤7, then add polyethylene glycol, mix well and add FeCl 2 4H 2 O, after mixing evenly, the reaction precursor solution is obtained; the degree of polymerization of polyethylene glycol is 1200, and the amount of polyethylene glycol added is 1 / 4 of the weight of deionized water; FeCl 2 4H 2 The amount of O added is 1 / 90 of the deionized water weight in step one;

[0026] c. Pour the reaction precursor solution into the hydrothermal reaction kettle in...

Embodiment 3

[0028] Preparation of Stainless Steel Mesh Supported FeCO by Hydrothermal Method 3 The method for negative electrode sheet, comprises the following steps:

[0029] a. Take the stainless steel mesh and first boil and corrode it with a dilute acid solution, then ultrasonically clean and dry it with deionized water to obtain a stainless steel mesh substrate with a clean surface, put it into a hydrothermal reaction kettle, and set it aside;

[0030] b. Add hexamethylenetetramine while stirring in deionized water, call HCl solution pH≤7, then add polyethylene glycol, mix well and add FeCl 2 4H 2 O, after mixing evenly, the reaction precursor solution is obtained; the degree of polymerization of polyethylene glycol is 5000, and the amount of polyethylene glycol added is 1 / 5 of the weight of deionized water; FeCl 2 4H 2 The amount of O added is 1 / 80 of the deionized water weight in step one;

[0031] c. Pour the reaction precursor solution into the hydrothermal reaction kettle in...

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Abstract

The invention relates to a method for preparing a stainless steel mesh-loaded FeCO3 negative plate by using a hydrothermal process. The method comprises the following steps: a, cleaning a stainless steel mesh and then putting the stainless steel mesh into a hydrothermal reaction vessel; b, adding hexamethylenetetramine into deionized water under stirring, adjusting the pH value of the obtained solution to no more than 7, then adding polyethylene glycol, carrying out uniform mixing, then adding FeCl2.4H2O, and carrying out uniform mixing so as to obtain a reaction precursor solution; and c, pouring the reaction precursor solution into a hydrothermal reaction vessel used in the step a until the solution totally immerses a stainless steel mesh substrate, closing the reaction vessel, putting the reaction vessel into a heater for a hydrothermal reaction, opening the reaction vessel after completion of the reaction, taking out the stainless steel mesh, and carrying out ultrasonic cleaning and drying so as to obtain the FeCO3 negative plate. According to the invention, the stainless steel mesh is used as the substrate, FeCl2.4H2O is used as an iron source, polyethylene glycol is used as atemplate and hexamethylenetetramine is used as a precipitating agent to prepare a stainless steel mesh-growing FeCO3 nanosheet electrode, and the procedures of slurry blending and sheet coating are omitted, so process flow is simple; and product performance is excellent.

Description

technical field [0001] The invention relates to the technical field of electrode materials, in particular to the preparation of stainless steel net-loaded FeCO by hydrothermal method 3 method of the negative plate. Background technique [0002] At present, graphitized carbon materials are the main anode materials for lithium-ion batteries, but the SEI film formed by carbon materials during the first discharge process will cause irreversible capacity loss, and sometimes lead to changes in the internal structure of carbon electrodes and poor electrical contact; The decomposition of the protective layer may lead to battery failure or cause safety problems; at the same time, the capacity per unit volume of the graphite negative electrode is relatively low, and it is difficult to meet the high energy density in fields such as electric vehicles, wind and solar energy storage, and smart grid energy storage and conversion. battery requirements. "Conversion type" negative electrode...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/136H01M4/1397H01M4/58
CPCH01M4/136H01M4/1397H01M4/5825Y02E60/10
Inventor 田文杰曲洋王小庆李辉李冬是凡高巧玲
Owner 东莞市华东环保设备有限公司