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Lead-acid cell cathode lead-paste modified by grapheme dispersion liquid, and preparation method thereof

A graphene dispersion, lead-acid battery technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as low specific energy of lead-acid batteries, reduce current density, reduce electrochemical polarization, and be suitable for large-scale production effect

Active Publication Date: 2013-10-23
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of low specific energy of existing lead-acid batteries, and to provide a negative lead paste of lead-acid batteries modified by graphene dispersion and its preparation method

Method used

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  • Lead-acid cell cathode lead-paste modified by grapheme dispersion liquid, and preparation method thereof
  • Lead-acid cell cathode lead-paste modified by grapheme dispersion liquid, and preparation method thereof
  • Lead-acid cell cathode lead-paste modified by grapheme dispersion liquid, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Preparation of lead-acid battery: The mass of lead powder in the paste formula of the negative electrode test is 3000g, the fiber is 2.1g, the acetylene black is 15g, and the barium sulfate is 24g. Mix for 10 minutes, then add the dispersed graphene aqueous dispersion into the paste mixer (according to the mass of the hydrophilic treated graphene is 0.15% of the mass of the lead powder), then add 270g of dilute sulfuric acid, and mix for 10 minutes , measure the apparent density, the apparent density should be 4.0g / cm 3 Add water according to the measured apparent density. Coat the reconciled lead paste on the negative grid. The weight of each wet plate is controlled at 320±3g. 3000g of lead paste can coat about 15±1 plates. Assembled into a 12Ah 2V lead-acid battery, with glass fiber cotton as the diaphragm, and the filling density is 1.325g / cm 3 The sulfuric acid aqueous solution is used as the electrolyte, and the battery is internalized to form a good lead-acid ba...

Embodiment 2

[0024] Preparation of lead-acid battery: The mass of lead powder in the paste formula of the negative electrode test is 3000g, the fiber is 2.1g, the acetylene black is 15g, and the barium sulfate is 24g. Mix for 10 minutes, then add the dispersed graphene aqueous dispersion into the paste mixer (according to the mass of the hydrophilic treated graphene is 0.25% of the mass of the lead powder), then add 270g of dilute sulfuric acid, and mix for 10 minutes , measure the apparent density, the apparent density should be 4.0g / cm 3 Add water according to the measured apparent density. Coat the reconciled lead paste on the negative grid. The weight of each wet plate is controlled at 320±3g. 3000g of lead paste can coat about 15±1 plates. Assembled into a 12Ah 2V lead-acid battery, with glass fiber cotton as the diaphragm, and the filling density is 1.325g / cm 3 The sulfuric acid aqueous solution is used as the electrolyte, and the battery is internalized to form a good lead-acid ba...

Embodiment 3

[0026] Preparation of lead-acid battery: The mass of lead powder in the paste formula of the negative electrode test is 3000g, the fiber is 2.1g, the acetylene black is 15g, and the barium sulfate is 24g. Mix for 10 minutes, then add the dispersed graphene aqueous dispersion into the paste mixer (according to the mass of the hydrophilic treated graphene is 0.20% of the mass of the lead powder), then add 270g of dilute sulfuric acid, and mix for 10 minutes , measure the apparent density, the apparent density should be 4.0g / cm 3 Add water according to the measured apparent density. Coat the reconciled lead paste on the negative grid. The weight of each wet plate is controlled at 320±3g. 3000g of lead paste can coat about 15±1 plates. Assembled into a 12Ah 2V lead-acid battery, with glass fiber cotton as the diaphragm, and the filling density is 1.325g / cm 3 The sulfuric acid aqueous solution is used as the electrolyte, and the battery is internalized to form a good lead-acid ba...

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Abstract

The invention relates to a lead-acid cell cathode lead-paste modified by a grapheme dispersion liquid, and a preparation method thereof. The lead-acid cell cathode lead-paste comprises the components by weight part: 3000 parts of lead powder, 2-5 parts of a fibre, 450-600 parts of the grapheme aqueous dispersion liquid, 10-20 parts of acetylene black, 20-25 parts of barium sulfate, 250-300 parts of sulfuric acid, and water which helps to make the apparent density of the lead paste to be 4.0+ / -0.5 g / cm<3>; wherein the fibre is polyester fibre, the grapheme aqueous dispersion liquid is formed by mixing hydrophilic-treated grapheme and water with a weight ratio of 9-15:1000 and performing ultrasonic dispersion. The grapheme conductive slurry is added into a negative plate as a cathode additive, and helps to substantially improve conductive capability of the negative plate, improve charging receptivity of the negative plate, increase the specific energy of the lead-acid cell, and make the discharge capacity to be substantially higher than that of a lead-acid cell added with none or carbon nanotubes.

Description

technical field [0001] The invention relates to a lead-acid battery negative electrode paste modified by a graphene dispersion liquid and a preparation method thereof, belonging to the technical field of lead-acid batteries and lead-acid battery additives. Background technique [0002] In recent years, the reduction of petroleum resources and the emission of environmental pollutants such as vehicle exhaust have increasingly become factors restricting the development of our lives. Therefore, energy and environmental issues have been put on the agenda, and the development of new green energy is imminent. The development of electric vehicles has provided a new way for this problem, and the battery has become a key factor restricting its development. At present, the number of electric vehicles in my country is growing rapidly year by year, and the corresponding demand for power batteries is growing very fast. Lead-acid batteries have always been the first choice for automotive ...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/56
CPCY02E60/12Y02E60/10
Inventor 马厚义陈婷高翔黄惠
Owner SHANDONG UNIV
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