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A kind of power lead-acid storage battery electrolyte additive and preparation method thereof

An electrolyte additive, lead-acid battery technology, applied in the field of electrochemistry, can solve the problems of reducing negative electrode hydrogen evolution overpotential, aggravating negative electrode hydrogen evolution, unfavorable cycle life, etc., so as to improve charging acceptability, reduce surface tension, and improve hydrogen evolution overpotential Effect

Active Publication Date: 2017-09-22
湖北骆驼海峡新型蓄电池有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increasing the acid content of the plate can improve the charge acceptance and low temperature performance, but it is not good for the cycle life
Increasing the content of carbon materials in the negative electrode can improve the charge acceptance to a certain extent, but it will reduce the hydrogen evolution overpotential of the negative electrode, resulting in intensified hydrogen evolution at the negative electrode and increased water consumption.

Method used

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  • A kind of power lead-acid storage battery electrolyte additive and preparation method thereof
  • A kind of power lead-acid storage battery electrolyte additive and preparation method thereof
  • A kind of power lead-acid storage battery electrolyte additive and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A power lead-acid battery electrolyte additive and a preparation method thereof are prepared by the following steps:

[0027] (1) The molar concentration is 0.05mol / L alum 33.3g and the molar concentration is 0.25mol / L Lithium sulfate monohydrate 51.1g joins in the blank sulfuric acid solution that 1000mL density is ρ=1.28g / mL, fully stirs to The crystals all dissolved.

[0028] (2) Add 22.6 g of trifluoromethanesulfonate quaternary ammonium salt-type ionic liquid P2 with a molar concentration of 0.05 mol / L to the solution described in the above (1) step, and fully stir until completely dissolved.

[0029] (3) Finally, add 15.8 g of L-serine with a molar concentration of 0.1 mol / L to the solution obtained in the above (2) step, stir well until it is completely dissolved, and finally adjust the electrolyte density to ρ=1.28 g with a small amount of deionized water / mL is enough.

Embodiment 2

[0031] A power lead-acid battery electrolyte additive and a preparation method thereof are prepared by the following steps:

[0032] (1) 28.3g of alum with a molar concentration of 0.1mol / L and lithium sulfate monohydrate 53.5g of a molar concentration of 0.35mol / L are added to the blank sulfuric acid solution whose density is ρ=1.28g / mL in 1000mL, fully stirred until The crystals all dissolved.

[0033] (2) Add 20.3 g of trifluoromethanesulfonic acid quaternary ammonium salt-type ionic liquid P20.3 g with a molar concentration of 0.10 mol / L to the solution described in step (1) above, and stir well until completely dissolved.

[0034] (3) Finally, add 11.85 g of L-serine with a molar concentration of 0.2 mol / L to the solution obtained in the above (2) step, stir well until it is completely dissolved, and finally adjust the electrolyte density to ρ=1.28 g with a small amount of deionized water / mL is enough.

Embodiment 3

[0036] A power lead-acid battery electrolyte additive and a preparation method thereof are prepared by the following steps:

[0037] (1) 28.3g of alum with a molar concentration of 0.2mol / L and lithium sulfate monohydrate 53.5g with a molar concentration of 0.5mol / L are added to 1000mL of density in the blank sulfuric acid solution of ρ=1.28g / mL, fully stirred until The crystals all dissolved.

[0038] (2) Then add 20.3 g of trifluoromethanesulfonate quaternary ammonium salt-type ionic liquid P20.3 g with a molar concentration of 0.15 mol / L to the solution described in the above (1) step, and fully stir until completely dissolved.

[0039] (3) Finally, add 11.85 g of L-serine with a molar concentration of 0.3 mol / L to the solution obtained in the above (2) step, stir well until it is completely dissolved, and finally adjust the electrolyte density to ρ=1.28 g with a small amount of deionized water / mL is enough.

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Abstract

The invention relates to a power lead-acid storage battery electrolyte additive and a preparation method thereof, and belongs to the technical field of electrochemistry. The power lead-acid storage battery electrolyte additive is prepared from the following components: alums, lithium sulfate monohydrate, trifluoromethane sulfonic quaternary ammonium salt type ionic liquid P, L-tryptophan and the balance of a sulfuric acid water solution with the density rho of 1.28 g / mL. According to the power lead-acid storage battery electrolyte additive and the preparation method thereof provided by the invention, by using the electrolyte provided by the invention, the charging receptivity of an existing rich solution tubular power and rich solution flat power lead-acid storage battery can be obviously improved by more than 10% under the precondition of without reducing the high-rate discharge performance at a low temperature of -18 DEG C, and the power lead-acid storage battery electrolyte additive has the obvious advantages of low water consumption and low cost, and is easy for large-scale industrial popularization and production.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to an electrolyte additive for a power lead-acid storage battery and a preparation method thereof. Background technique [0002] Power lead-acid batteries have high technical requirements for charge acceptance, low-temperature high-rate discharge performance and cycle life. There are many traditional ways to improve charge acceptance and low-temperature high-rate discharge performance, but the easiest, quickest and most practical way is to use electrolyte additives to improve. [0003] Due to the improvement of the charging acceptance capacity and low-temperature high-rate discharge performance of power lead-acid batteries in the industry, the main technical solutions focus on the following aspects: [0004] (1) The thickness of the electrode plate is reduced, and the number of positive and negative electrodes in the electrode group is increased. This measure ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/08H01M10/12
CPCH01M10/08H01M10/12H01M2300/0011Y02E60/10Y02P70/50
Inventor 张兴张祖波史俊雷夏诗忠余萍张行祥刘长来
Owner 湖北骆驼海峡新型蓄电池有限公司