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Preparation method of high-power external application type lead-carbon battery negative electrode

A lead-carbon battery, high-power technology, applied in the field of preparation of high-power external lead-carbon battery negative electrode, to achieve the effects of avoiding reduction, improving effective utilization, and inhibiting sulfation

Active Publication Date: 2020-04-28
吉林省凯禹电化学储能技术发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The phenomenon of lead deposition on the surface of the negative electrode carbon material of the externally applied lead-carbon battery has not been well resolved

Method used

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  • Preparation method of high-power external application type lead-carbon battery negative electrode
  • Preparation method of high-power external application type lead-carbon battery negative electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 85 lead powder, 3wt% humic acid, 3wt% 10mm long dacron, 3wt% barium sulfate, 3wt% sodium lignosulfonate, 3wt% acetylene black are mixed uniformly to make active substance, mixed The active substance is slowly added to its total weight of 8wt% water and 12.5wt% 4.6mol / L sulfuric acid and stirred evenly to form a lead paste;

[0038] 85wt% 1960m 2 / g activated carbon material, 10wt% carbon black, and 5wt% polytetrafluoroethylene are mixed evenly in dehydrated alcohol, and the quality of dehydrated alcohol is 180 times that of the activated carbon material. The absolute ethanol was evaporated to dryness by constant stirring at 90°C to obtain a homogeneous mixture. Add 0.3ml / mg of absolute ethanol to the mixture, roll it into a tablet, and then dry it at 90°C for 12 hours to obtain a carbon sheet. The loading of the mixture in the carbon sheet is 3mg / cm 2 ;

[0039] 50wt% polystyrene, 25wt% acetylene black, 25wt% 1530m 2 / g activated carbon material was mixed with suff...

Embodiment 2

[0051] 85 lead powder, 3wt% humic acid, 3wt% 10mm long dacron, 3wt% barium sulfate, 3wt% sodium lignosulfonate, 3wt% acetylene black are mixed uniformly to make active substance, mixed The active substance is slowly added to its total weight of 8wt% water and 12.5wt% 4.6mol / L sulfuric acid and stirred evenly to form a lead paste;

[0052] 85wt% 1960m 2 / g activated carbon material, 10wt% carbon black, and 5wt% polytetrafluoroethylene are mixed evenly in dehydrated alcohol, and the quality of dehydrated alcohol is 180 times that of the activated carbon material. The absolute ethanol was evaporated to dryness by constant stirring at 90°C to obtain a homogeneous mixture. Add 0.3ml / mg of absolute ethanol to the mixture, roll it into a tablet, and then dry it at 90°C for 12 hours to obtain a carbon sheet. The loading of the mixture in the carbon sheet is 3mg / cm 2 ;

[0053] 55wt% polystyrene, 25wt% acetylene black, 20wt% 1530m 2 / g activated carbon material was mixed with suff...

Embodiment 3

[0065] 85 lead powder, 3wt% humic acid, 3wt% 10mm long dacron, 3wt% barium sulfate, 3wt% sodium lignosulfonate, 3wt% acetylene black are mixed uniformly to make active substance, mixed The active substance is slowly added to its total weight of 8wt% water and 12.5wt% 4.6mol / L sulfuric acid and stirred evenly to form a lead paste;

[0066] 85wt% 1960m 2 / g activated carbon material, 10wt% carbon black, and 5wt% polytetrafluoroethylene are mixed evenly in dehydrated alcohol, and the quality of dehydrated alcohol is 180 times that of the activated carbon material. The absolute ethanol was evaporated to dryness by constant stirring at 90°C to obtain a homogeneous mixture. Add 0.3ml / mg of absolute ethanol to the mixture, roll it into a tablet, and then dry it at 90°C for 12 hours to obtain a carbon sheet. The loading of the mixture in the carbon sheet is 3mg / cm 2 ;

[0067] 60wt% polystyrene, 20wt% acetylene black, 20wt% 1530m 2 / g activated carbon material was mixed with suff...

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Abstract

The invention discloses a preparation method of a high-power external application type lead-carbon battery negative electrode. The negative electrode consists of three parts, namely, lead plaster, a carbon plate and gel. The structure that the carbon plate is attached to the surface of the lead plaster can improve electrode potential distribution, inhibit surface sulfation and improve the effective utilization rate of active substances. When lead ions in an electrolyte contact with the carbon plate of the negative electrode, lead and lead sulfate oxidation-reduction circulation occurs on the surface of the carbon plate under the electrochemical action, sulfation is generated, and the power density and the cycling stability of the electrode are reduced. The gel can inhibit lead ions from contacting the surface of the carbon material, avoid reduction of the lead ions, inhibit sulfation of the surface of the carbon material, ensure normal exertion of beneficial effects of the carbon material, improve the charge-discharge efficiency of the electrode and prolong the cycle service life of the electrode. The external application type lead-carbon battery composed of the negative electrodehas higher large-current bearing capacity and cycling stability, and is suitable for the fields of start-stop automobiles, solar energy, wind energy storage and the like.

Description

Technical field: [0001] The invention relates to a preparation method of a negative electrode of a high-power externally applied lead-carbon battery Background technique: [0002] With the acceleration of the global electrification process, it is imminent to develop advanced energy storage systems with good safety, low cost and high performance. Lead-acid batteries have strong low temperature stability, high cost performance, and mature technology, but the power density is not high (<200W Kg-1), and the cycle capacity is low (1C, 80% DOD, 400 cycles). [0003] The externally applied lead-carbon battery is a power-type lead-acid battery, which is aimed at strengthening the high current capacity and the cycle life of the high-rate part of the state of charge. The externally applied lead-carbon battery pastes the carbon material on the surface of the negative electrode paste. While ensuring the full contact between the carbon material and the electrolyte, the carbon materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/20H01M4/57H01M4/62
CPCH01M4/20H01M4/57H01M4/62H01M2004/027Y02E60/10
Inventor 林海波包金鹏林楠
Owner 吉林省凯禹电化学储能技术发展有限公司
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