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A kind of lead-carbon battery negative lead paste for energy storage and preparation method thereof

A lead-carbon battery and negative lead paste technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems that the service life is difficult to meet the design expectations, limit the promotion and application of lead-carbon batteries, and the sulfation of battery plates. Enhance the charging acceptance, improve the service life, and prevent the effect of agglomeration and recombination

Active Publication Date: 2020-11-20
CHAOWEI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this often leads to insufficient charging of the battery, leading to sulfation of the battery plate, so it is necessary to regularly and frequently balance the battery
However, with the existing conditions of use of lead-carbon batteries for energy storage, it is difficult to implement such a strict and cumbersome charging system, and the actual service life is difficult to meet the design expectations, which objectively limits the promotion of lead-carbon batteries in the field of energy storage application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0068] The preparation method of the lead-carbon battery negative electrode paste for energy storage comprises the following steps:

[0069] (1) Inject deionized water into the mixing equipment, and add lignin, barium sulfate, carbon black, graphite, activated carbon, graphene nanosheets doped with carbon nanotubes, and indium oxide in sequence under stirring to obtain a suspension Liquid A, continue to stir, and set aside; Suspension A is kept in a state of continuous stirring before use.

[0070] (2) Polyethylene glycol is injected into the heater, and then in a stirring state, stearic acid is added and continuously stirred. After stearic acid is completely dissolved in polyethylene glycol, solution B is prepared, and solution B is mixed at 70 Keep warm at ~90°C for later use.

[0071] (3) Put the lead powder into the paste machine, add short fibers, and stir for 3-6 minutes; under the stirring state, within 2-5 minutes, add the suspension A into the paste machine; after ad...

Embodiment 1

[0075] Preparation of graphene nanosheets doped with carbon nanotubes: Mix graphene oxide and carbon nanotubes at a mass ratio of 3:1, first disperse and mix uniformly through ultrasonic waves, then perform chemical reduction, and finally obtain doped carbon nanosheets through rotary evaporation. Nanotubes of graphene nanosheets.

[0076] Its technical parameters are as follows:

[0077] Test items Test results Detection method Graphene content (wt.%) 66.7±0.2 / Carbon nanotube content (wt.%) 33.3±0.2 / Diameter of graphene nanosheets (nm) 5～15 GB / T 19077.1 Ash (wt.%) ≤0.5 GB / T 3521-95 Moisture (wt.%) ≤0.5 GB / T6283

[0078] Weigh the following raw materials: lead powder (degree of oxidation: 72% to 78%) 1000Kg, sulfuric acid solution (1.400±0.005g / cm 3 ) is added in an amount of 8.5% of lead powder, deionized water (conductivity ≤ 2μS / cm) is added in an amount of 11% of lead powder, barium sulfate (fineness: 325 mesh resi...

Embodiment 2

[0087] Preparation of graphene nanosheets doped with carbon nanotubes: Mix graphene oxide and carbon nanotubes at a mass ratio of 3.5:1, first disperse and mix uniformly through ultrasonic waves, then perform chemical reduction, and finally obtain doped carbon nanosheets through rotary evaporation. Nanotubes of graphene nanosheets.

[0088] Weigh the following raw materials: lead powder (degree of oxidation: 72% to 78%) 1000Kg, sulfuric acid solution ((1.400 ± 0.005g / cm 3 )) The addition amount is 8.5% of the lead powder, the addition amount of deionized water (conductivity ≤ 2μS / cm) is 11% of the lead powder, and the addition amount of barium sulfate (fineness: 325 mesh sieve residue ≤ 0.10%) is 0.55% of lead powder, 0.25% of lignin, 0.15% of graphite (high-purity anisotropic graphite), 0.2% of carbon black (acetylene black), hard The addition of fatty acid (analytical pure) is 0.05% of the lead powder, the addition of polyethylene glycol (PEG400) is 0.3% of the lead powder,...

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Abstract

The invention relates to the field of lead carbon batteries, and discloses lead carbon battery negative electrode lead plaster for energy storage and a preparation method thereof. The negative electrode lead plaster is prepared from the following components in parts by weight: 100 parts of lead powder, 6-9 parts of sulfuric acid, 8-13 parts of deionized water, 0.5-1.0 part of barium sulfate, 0.1-0.3 part of lignin, 0.1-0.5 part of graphite, 0.1-0.3 part of carbon black, 0.01-0.10 part of stearic acid, 0.2-0.5 part of polyethylene glycol, 0.5-1.0 part of activated carbon, 0.1-0.6 part of carbonnano tube doped graphene nanosheet, 0.01-0.06 part of indium oxide and 0.08-0.15 part of short fibers. Through improving a formula of the negative electrode lead plaster of the lead carbon battery and the preparation method thereof, the charging receptivity of the battery is improved, the sulfation of a negative electrode is slowed down, the water consumption of the battery is reduced, and the practical service life of the lead carbon battery is further prolonged.

Description

technical field [0001] The invention relates to the field of lead-carbon batteries, in particular to an energy storage lead-carbon battery negative lead paste and a preparation method thereof. Background technique [0002] Compared with ordinary VRLA batteries, lead-carbon batteries for energy storage have the advantages of capacitive characteristics, high charge acceptance, superior high-rate discharge performance, strong resistance to sulfation, and long cycle life. They are currently energy storage with great development potential. Use lead-acid batteries. The negative plate of the lead-carbon battery generally adds a relatively high content of carbon material, and the added carbon material has a high specific surface area (BET), which can enhance the charge acceptance of the battery and slow down the sulfation of the negative electrode. However, different carbon materials contain different impurities. Some carbon materials contain impurities that reduce the overpotentia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/57
CPCH01M4/57Y02E60/10
Inventor 张崇波李有德张祚强李祥军赵刚
Owner CHAOWEI POWER CO LTD
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