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Electrolyte additive for hydrogen evolution suppression of lead-acid storage battery and preparation method for electrolyte additive

An electrolyte additive, lead-acid battery technology, applied in lead-acid batteries and other directions, can solve the problem of poor cycle life improvement, and achieve the effect of improving hydrogen evolution overpotential

Active Publication Date: 2014-09-24
ANHUI YONGHENG STORAGE BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The object of the present invention is to provide a kind of through the adsorption of succinic acid and the effect of refine crystal of polyaspartic acid, improve negative acid Hydrogen evolution overpotential at the negative electrode of the battery, improve the electrochemical performance of the battery and improve the cycle life of the lead-acid battery to inhibit the hydrogen evolution Electrolyte additive

Method used

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  • Electrolyte additive for hydrogen evolution suppression of lead-acid storage battery and preparation method for electrolyte additive
  • Electrolyte additive for hydrogen evolution suppression of lead-acid storage battery and preparation method for electrolyte additive

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Embodiment 1

[0026] A preparation method of an electrolyte additive for lead-acid batteries to suppress hydrogen evolution, adding pure water to concentrated sulfuric acid to adjust the density to 1.03g / cm 3 , to prepare dilute sulfuric acid, take 1L of dilute sulfuric acid and heat it to 40°C, add polyaspartic acid, sodium sulfate, disodium edetate, then add succinic acid while stirring, and oscillate ultrasonically for 40min, then cool to room temperature.

[0027] Among them, each liter of lead-acid battery electrolyte contains: polyaspartic acid 1500mg / L, sodium sulfate 1000mg / L, succinic acid 1500mg / L, edetate disodium 3000mg / L, and the rest is sulfuric acid solution; The frequency is 45Hz.

Embodiment 2

[0029] A preparation method of an electrolyte additive for lead-acid batteries to suppress hydrogen evolution, adding pure water to concentrated sulfuric acid to adjust the density to 1.26g / cm 3 , to prepare dilute sulfuric acid, take 1L of dilute sulfuric acid and heat to 42°C, add polyaspartic acid, sodium sulfate, disodium ethylenediamine tetraacetate, then add succinic acid while stirring, and oscillate with ultrasonic for 45min, then cool to room temperature.

[0030] Among them, each liter of lead-acid battery electrolyte contains: polyaspartic acid 1800mg / L, sodium sulfate 1100mg / L, succinic acid 1800mg / L, edetate disodium 4000mg / L, and the rest is sulfuric acid solution; The frequency is 50Hz.

Embodiment 3

[0032] A preparation method of an electrolyte additive for lead-acid batteries to suppress hydrogen evolution, adding pure water to concentrated sulfuric acid to adjust the density to 1.3g / cm 3 , to prepare dilute sulfuric acid, take 1L of dilute sulfuric acid and heat it to 45°C, add polyaspartic acid, potassium sulfate, and disodium edetate, then add succinic acid while stirring, vibrate ultrasonically for 50 minutes, and cool to room temperature.

[0033] Among them, each liter of lead-acid battery electrolyte contains: polyaspartic acid 2000mg / L, potassium sulfate 1200mg / L, succinic acid 2000mg / L, EDTA disodium 6000mg / L, and the rest is sulfuric acid solution; The frequency is 55Hz.

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Abstract

The invention relates to an electrolyte additive for hydrogen evolution suppression of a lead-acid storage battery. The additive contains polyaspartic acid, sulfate, succinic acid and ethylenediamine tetraacetic acid disodium; each liter of electrolyte of the lead-acid storage battery contains 1,500-2,000mg / L of polyaspartic acid, 1,000-1,200mg / L of sulfate, 1,500-2,000mg / L of succinic acid, 3,000-6,000mg / L of ethylenediamine tetraacetic acid disodium and the rest of a sulfuric acid. The succinic acid and the polyaspartic acid are mixed according to a certain ratio to form a sulfuric acid electrolyte additive; under the adsorption action of the succinic acid and the crystal refining action of the polyaspartic acid, the negative electrode hydrogen evolution overpotential of the lead-acid storage battery is increased, the electrochemical performance of the battery is improved, and the cycle service life of the battery is prolonged.

Description

technical field [0001] The invention relates to a lead-acid storage battery electrolyte, in particular to an electrolyte additive for suppressing hydrogen evolution of a lead-acid storage battery which improves the hydrogen evolution overpotential of the negative electrode of the negative acid storage battery, improves the electrochemical performance of the battery and increases the cycle life of the battery, and a preparation method thereof. Background technique [0002] Since the advent of lead-acid batteries in 1859, people have been exploring the addition of certain solid or liquid additives to the electrolyte to increase battery capacity and extend battery life. Although the effectiveness of these additives is not certain, efforts have been made to find electrolyte additives to improve battery performance. [0003] Lead-acid batteries have been widely used in various fields, especially in the field of telecommunications, backup power supply, energy storage power suppl...

Claims

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Application Information

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IPC IPC(8): H01M10/08
CPCY02E60/126H01M10/08Y02E60/10
Inventor 张绍辉
Owner ANHUI YONGHENG STORAGE BATTERY
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