Surface modification method for raising activity of electrode material of vanadium cell

An electrode material and surface modification technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of reduced battery life, high-temperature sintering with complicated steps of precious metal modification, and decreased stability of electrode materials, etc., to improve service life and price Effect of low cost and improved reversibility

Active Publication Date: 2012-10-10
辽宁科京新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The heat treatment and acid treatment in the prior art of the present invention easily lead to the overoxidation of the material, which reduces the stability of the electrode material, the battery life and other shortcomings, as well as the complicated steps of noble metal modification and the influence of high temperature sintering, etc., the present invention The purpose is to provide a surface modification method for improving the activity of vanadium electrode materials with simple process, mild treatment conditions, easy control, and no pollution to the environment.

Method used

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  • Surface modification method for raising activity of electrode material of vanadium cell
  • Surface modification method for raising activity of electrode material of vanadium cell
  • Surface modification method for raising activity of electrode material of vanadium cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1

[0034] 1) Put the polypropylene carbon felt material with a thickness of 4mm in the superponement of the ultrasonic water in the ion water for 20min, put it in the oven at 75 ° C for 3 hours, and store it in the dryer for later use.

[0035] 2) Put the electrode material in the processing step 1) into the surface modified device of the ionic plasma plasma.The structure of the surface modification device of RF plasma is like figure 2 It is shown in the reaction room D. There is a sample table in the reaction room, and the ground end of RF generator A is connected to the sample table under the sample table. The other end of the RF generator A is connected to the electrode above the sample table in the reaction chamber D.When modifying the electrode material, put the electrode material as a sample B on the sample table.After the gas supply and vacuum system, the reaction chamber is vacuum, and then the reaction gas oxygen is used to maintain the pressure of the gas...

Embodiment 2

[0037] Example 2

[0038] The difference from Example 1 is:

[0039] 1) Put the graphite of a polypropylene cymbal with a thickness of 4mm and put it in the ultrasonic water in the ion water for 20min, put it in the oven at 75 ° C for 3 hours, and store it in the dryer for later use.

[0040] 2) Put the electrode material in the processing step 1) into the surface modified device of the ionic plasma plasma.After the gas supply and vacuum system, the reaction room was vacuum, and then the reaction gas nitrogen was passed in to maintain the pressure of the gas system of the reaction room by 150Pa. The processing time was 100s.The gas flow is 100ml / min.The instrument power is controlled at 200W.

[0041] 3) Wash the graphite -felt ultrasound of the step 2) for 5 minutes. Take it out and dry it at 100 ° C for 3 hours. You can use the electrode material of the battery to assemble the battery.

Embodiment 3

[0042] Example 3

[0043] The difference from Example 1 is:

[0044] 1) Put the graphite of a polypropylene cymbal with a thickness of 4mm and put it in the ultrasonic water in the ion water for 20min, put it in the oven at 75 ° C for 3 hours, and store it in the dryer for later use.

[0045] 2) Put the electrode material in the processing step 1) into the surface modified device of the ionic plasma plasma, and then draw the reaction room through the gas supply and vacuum system, and then pass the reaction gas ammonia gas to maintain the reaction room gas system systemThe pressure is 100Pa, and the processing time is from 300s.The gas flow is 100ml / min.The instrument power is controlled at 200W.

[0046] 3) Wash the graphite felt material in step 2) for 5 minutes. Take it out and dry at 100 ° C in the oven for 3 hours. You can use the electrode material for the battery to assemble the battery.

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Abstract

The invention, relating to the field of cell manufacturing and energy storage, discloses a surface modification method for raising the activity of an electrode material of a vanadium cell, comprising the following steps: firstly cleaning the electrode material of the vanadium cell to remove surface impurities, then carrying out modification treatment of the electrode material by using plasma, reacting the gas which generates plasma with the electrode surface under ionization state to generate polar functional groups; and finally carrying out ultrasonic cleaning on the modified electrode material for 5-30 min and drying at 60-120 DEG C. According to the invention, by using the method of the invention to carry out surface modification on the electrode material of the vanadium cell, the hydrophilcity of the electrode surface is enhanced, partial polar functional groups has good catalytic influence on electrode reaction, and the energy storage efficiency of the cell is expected to increase. The method can be used for processing material surfaces with various morphologies and can keep mechanical properties and the like of material matrixes, the experiment condition are easy to control and the method has no pollution to environment. The method is efficient and environmentally friendly.

Description

Technical field [0001] The present invention involves the field of battery manufacturing and energy storage, and is specifically a surface modification method to improve the activity of the electrode material of the cymbal battery. Background technique [0002] Full oxidation and reduction liquid flow battery (钒 battery) is a secondary energy system that uses the oxidation and reduction response between iones with different prices for energy storage and transformation.It is characterized by: non -emission pollution, adjustable capacity, long circulation life, deep current density discharge, rapid charging, and high energy conversion rate.电 Battery is mainly used as a power storage power supply in power stations, large -scale photoelectric conversion, energy storage power supply for wind power, and energy storage systems as remote areas. [0003] At present, the electrode material used by the barter battery is mainly carbon -based graphite carbon felt. The material has the advanta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88
CPCY02E60/50
Inventor 刘建国李文跃严川伟
Owner 辽宁科京新材料有限公司
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