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Carbon cathode plate for super cell

A super battery and negative plate technology, applied in circuits, capacitors, electrolytic capacitors, etc., to achieve the effects of improved cycle life, low cost, and wide sources

Inactive Publication Date: 2013-04-17
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the hydrogen evolution problem of the capacitor carbon electrode in the existing super battery, and provides a carbon negative plate for the super battery, which improves the hydrogen evolution overpotential of the capacitor carbon negative plate, effectively solves the hydrogen evolution problem of the capacitor carbon electrode, thereby improving the The charging efficiency of the super battery can promote the conversion of large-particle lead sulfate formed by discharge into sponge lead, which effectively prolongs the cycle life of the lead-acid battery and improves the performance of the battery power and other aspects.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0021] Take 80g of activated carbon, 10g of acetylene black, 5g of polyvinylidene fluoride, and 5g of powdered lead nitrate with an average particle size of 5 μm, mix them evenly, add an appropriate amount of N-methylpyrrolidone (NMP), and stir the above materials to make a paste , Press the paste on a plodder to form a carbon strip of appropriate thickness, and then cut it into a carbon sheet that meets the size of the grid. Then use a manual hydraulic press to press the carbon sheet into the grid, and dry it in an oven at 60°C to obtain a finished carbon negative plate.

[0022] Such as figure 1 As shown, using the linear potential scanning method (LSV) to study the blank carbon negative plate and the carbon negative plate added with the hydrogen evolution inhibitor lead nitrate, it was found that the addition of lead nitrate made the hydrogen evolution overpotential of the carbon negative plate move to the negative potential direction, which can effectively It can effectiv...

Embodiment 2

[0024] Take 80g of activated carbon, 10g of acetylene black, 5g of polyvinylidene fluoride, and 5g of powdered zinc nitrate with an average particle size of 5 μm, mix them evenly, add an appropriate amount of N-methylpyrrolidone (NMP), and stir the above materials to make a paste , Press the paste on a plodder to form a carbon strip of appropriate thickness, and then cut it into a carbon sheet that meets the size of the grid. Then use a manual hydraulic press to press the carbon sheet into the grid, and dry it in an oven at 60°C to obtain a finished carbon negative plate.

[0025] Such as figure 2 As shown, using the linear potential scanning method (LSV) to study the blank carbon negative plate and the carbon negative plate added with the hydrogen evolution inhibitor zinc nitrate, it was found that the addition of zinc nitrate made the hydrogen evolution overpotential of the carbon negative plate move to the negative potential direction, which can effectively It can effecti...

Embodiment 3

[0027] Take 75g of activated carbon, 11g of acetylene black, 4.5g of polyvinylidene fluoride, 5g of powdered lead nitrate with an average particle size of 2μm, and 4.5g of powdered zinc nitrate with an average particle size of 2μm, mix them evenly, and add an appropriate amount of N-methylpyrrolidone (NMP), the above materials are stirred to make a paste, and the paste is pressed into a carbon belt with an appropriate thickness on a plodder, and then cut into a carbon sheet that meets the size of the grid. Then use a manual hydraulic press to press the carbon sheet into the grid, and dry it in an oven at 60°C to obtain a finished carbon negative plate.

[0028] Experiments have found that the mixture of lead nitrate and zinc nitrate can effectively suppress the hydrogen evolution problem of the carbon electrode of the capacitor at the end of charging, thereby improving the charging efficiency of the super battery and effectively improving the cycle life of the lead-acid battery...

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Abstract

The invention discloses a carbon cathode plate for a super cell. The carbon cathode plate comprises the ingredients of active carbon, acetylene black and polyvinylidene fluoride, and is characterized by also comprising a hydrogen evolution inhibitor. According to the invention, a hydrogen evolution problem which is generated by a capacitor carbon electrode in a charging final stage and caused by large operation potential difference between a lead cathode plate and a capacitor carbon electrode in the super cell is solved, thus charging efficiency of the super cell is improved, large granule lead sulfate formed in discharging is promoted to be converted into spongy lead, and a cycle life of a plumbic acid cell is effectively raised. The hydrogen evolution inhibitor has a wide composition source and low cost, and has no special requirement for production equipment. The hydrogen evolution inhibitor has a simple and practicable preparation method, and is suitable for large scale productionapplication.

Description

technical field [0001] The invention belongs to the field of electrochemical energy storage devices, and in particular relates to a carbon negative plate for a super battery. Background technique [0002] With the continuous development of the economy, energy, resources and the environment have become the focus of society, and it is an urgent and arduous task for human society to find clean and renewable energy. [0003] Supercapacitors, also known as electrochemical capacitors, are a new type of green energy storage device developed in recent years. They have the characteristics of fast charge and discharge, high power density, and long cycle life. Based on these excellent properties, supercapacitors can be used as a pollution-free backup power supply for a variety of electrical equipment. At the same time, they can also form a composite power supply with batteries to provide power for electric vehicles. In recent years, they have received widespread attention and developed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/042
Inventor 陈红雨王富茜
Owner SOUTH CHINA NORMAL UNIVERSITY
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