Electrolyte for super lead acid battery

A super lead-acid battery and electrolyte technology, applied in the direction of lead-acid batteries, etc., can solve the problems of increasing battery cost and complicated process, and achieve the effects of greatly suppressing hydrogen evolution, increasing hydrogen evolution overpotential, and increasing hydrogen evolution impedance

Inactive Publication Date: 2013-02-27
JIANGXI YONGFANG POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the hydrogen suppression modification of carbon materials at home and abroad focuses on the doping modification of carbon materials. Although some effects have been achieved, the process is complicated and increases the cost of batteries.

Method used

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  • Electrolyte for super lead acid battery
  • Electrolyte for super lead acid battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 100ppmPb(NO 3 ) 2 and 0.1g / L citric acid to make electrolyte.

[0029] Prepare activated carbon, conductive agent, and adhesive (PVDF) according to the ratio of 8:1:1. After fully grinding in the mortar for 30 minutes, add the solvent NMP to continue grinding for a period of time, and then apply the mixed slurry on the current collector. pressed into a pole plate, and dried to obtain an activated carbon negative electrode.

[0030] Assemble a super lead-acid battery, use the carbon electrode as the working electrode, and the saturated calomel electrode as the reference electrode, and investigate the hydrogen evolution characteristics of the activated carbon electrode in the range of -0.9~-0.4V at a scanning speed of 10mV / s. Compared with ordinary electrolyte super batteries, the hydrogen evolution of the carbon negative electrode of the new electrolyte super lead-acid battery is reduced by 10%-20%.

Embodiment 2

[0032] Add 100ppmPb(NO 3 ) 2 , 20g / LZnSO 4 And 5g / L citric acid to make electrolyte.

[0033] Prepare activated carbon, conductive agent, and adhesive (PVDF) according to the ratio of 8:1:1. After fully grinding in the mortar for 30 minutes, add the solvent NMP to continue grinding for a period of time, and then apply the mixed slurry on the current collector. pressed into a pole plate, and dried to obtain an activated carbon negative electrode.

[0034] Assemble a super lead-acid battery, use the carbon electrode as the working electrode, and the saturated calomel electrode as the reference electrode, and investigate the hydrogen evolution characteristics of the activated carbon electrode in the range of -0.9~-0.4V at a scan rate of 10mV / s. Compared with ordinary electrolyte super batteries, the new electrolyte super lead-acid battery carbon negative electrode hydrogen evolution is reduced by about 20%.

Embodiment 3

[0036] Add 100ppmBi in 5M sulfuric acid 2 o 3 , 100ppmPb(NO 3 ) 2 , 1g / LZnSO 4 And 5g / L citric acid to make electrolyte.

[0037]Prepare activated carbon, conductive agent, and adhesive (PVDF) according to the ratio of 8:1:1. After fully grinding in the mortar for 30 minutes, add the solvent NMP to continue grinding for a period of time, and then apply the mixed slurry on the current collector. pressed into a pole plate, and dried to obtain an activated carbon negative electrode.

[0038] Assemble a super lead-acid battery, use the carbon electrode as the working electrode, and the saturated calomel electrode as the reference electrode, and investigate the hydrogen evolution characteristics of the activated carbon electrode in the range of -0.9~-0.4V at a scanning speed of 10mV / s. Compared with ordinary electrolyte super batteries, the new electrolyte super lead-acid battery carbon negative electrode hydrogen evolution is reduced by 50%-60%.

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Abstract

The invention provides an electrolyte formula for a super lead acid battery. The electrolyte for the super lead acid battery comprises sulfuric acid solution, hydrogen evolution inhibitor and additives, wherein the hydrogen evolution inhibitor is a mixture of one or more of metal salts, metal-ion complexes and organic matters which are capable of blocking hydrogen ions from discharging on the carbon negative electrode, raising the hydrogen evolution over potentiality of the carbon negative electrode surface of the super lead acid battery. The advantage of the electrolyte is that the hydrogen evolution inhibitor can block hydrogen ions from discharging on the carbon negative electrode, thus the hydrogen evolution over potentiality of the carbon negative electrode material of the super lead acid battery is raised, the problem of serious hydrogen evolution of the carbon negative electrode surface of the super lead acid battery is solved, and simultaneously the specific capacity of the carbon negative electrode is increased. The electrolyte disclosed herein is suitable for industrial application.

Description

technical field [0001] The invention discloses a super lead-acid battery electrolyte, which belongs to the field of electrochemical energy storage devices. Background technique [0002] Power battery is one of the key technologies of new energy vehicles, and is favored by the majority of automobile and auto parts companies and investors. At present, power batteries mainly include lead-acid batteries, Cd-Ni batteries, MH-Ni batteries, liquid lithium-ion batteries, polymer lithium-ion batteries, proton exchange membrane fuel cells (PEMFC), and direct methanol fuel cells (DMFC). There are on-board experiments. As the battery with the longest application history, lead-acid batteries are widely used as power sources for electronic equipment in traditional cars. In the field of new energy vehicles, they are not only used as traction power sources for small cars such as sightseeing cars and police cars, but also as Widely used in EV, HEV and plug-in 12V power supply. [0003] Ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/08
CPCY02E60/126Y02E60/10
Inventor 蒋良兴洪波赖延清陈绪杰薛海涛于枭影关翔李劼刘业翔
Owner JIANGXI YONGFANG POWER CO LTD
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