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Electrolyte additive 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 problems of low electric capacity and poor cycle life improvement, and achieve the effects of improving cycle life, preventing decomposition, and increasing conductivity

Inactive Publication Date: 2017-05-10
TIANNENG GRP HENAN ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a lead-acid battery electrolyte additive and a preparation method thereof in order to solve the defects that the existing lead-acid battery electrolyte additives have poor cycle life improvement and low capacitance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method of an electrolyte additive for a lead-acid battery, adding pure water to concentrated sulfuric acid to adjust the density to 1.05g / cm 3 , to prepare dilute sulfuric acid, take 1L dilute sulfuric acid and heat it to 45°C, add nano-silica and mix evenly, add graphene oxide, potassium sulfate, stannous sulfate, then add EDTA-Na while stirring, and use a high-speed mixer at 3000rmv Stir for 40 min at 1 / min, cool to room temperature and continue stirring at high speed until the mixture is uniform. Among them, graphene oxide 200mg / L, nano-silicon dioxide 1000mg / L, potassium sulfate 800mg / L, stannous sulfate 3000mg / L, EDTA-Na2000mg / L per liter of lead-acid battery electrolyte, and the balance is sulfuric acid solution.

Embodiment 2

[0023] A preparation method of an electrolyte additive for a lead-acid battery, adding pure water to concentrated sulfuric acid to adjust the density to 1.20g / cm 3 , to prepare dilute sulfuric acid, take 1L dilute sulfuric acid and heat it to 50°C, add nano-silica and mix evenly, add graphene oxide, potassium sulfate, stannous sulfate, then add EDTA-Na while stirring, and use a high-speed mixer at 3000rmv Stir for 45 min at a speed of 1 / min, cool to room temperature and continue stirring at high speed until the mixture is uniform. Among them, graphene oxide 250mg / L, nano silicon dioxide 1100mg / L, potassium sulfate 1000mg / L, stannous sulfate 2500mg / L, EDTA-Na2500mg / L per liter of lead-acid battery electrolyte, and the balance is sulfuric acid solution.

Embodiment 3

[0025] A preparation method of an electrolyte additive for a lead-acid battery, adding pure water to concentrated sulfuric acid to adjust the density to 1.40g / cm 3 , to prepare dilute sulfuric acid, take 1L dilute sulfuric acid and heat it to 45°C, add nano-silica and mix evenly, add graphene oxide, potassium sulfate, stannous sulfate, then add EDTA-Na while stirring, and use a high-speed mixer at 3000rmv Stir for 50 min at 1 / min, cool to room temperature and continue stirring at high speed until the mixture is uniform. Among them, graphene oxide 300mg / L, nano silicon dioxide 2000mg / L, potassium sulfate 1500mg / L, stannous sulfate 2000mg / L, EDTA-Na3000mg / L per liter of lead-acid battery electrolyte, and the balance is sulfuric acid solution.

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Abstract

The invention relates to an electrolyte of a lead-acid storage battery, particularly to an electrolyte additive of the lead-acid storage battery; the electrolyte additive of the lead-acid storage battery can improve electrochemical performance, prolong the cycle life and improve capacity of the battery. The additive is prepared from graphene oxide, silicon dioxide, sulfate, stannous sulfate and EDTA-Na. By virtue of the electrolyte additive, the electrochemical performance and the capacity of the battery can be effectively improved and the cycle life of the lead-acid storage battery can be prolonged.

Description

technical field [0001] The invention relates to a lead-acid storage battery electrolyte, in particular to an electrolyte additive for a lead-acid storage battery which improves the electrochemical performance of the battery, increases the cycle life of the battery and simultaneously increases the battery capacity, and a preparation method thereof. Background technique [0002] When the lead-acid battery is connected to the circuit and discharged, electrons are released from the anode (negative plate), and the formed Pb2+ ions immediately react with SO42- ions, depositing insoluble lead sulfate on the electrode surface. At the cathode (positive plate), electrons from the external circuit reduce PbO2 to water and Pb2+ ions, which in turn immediately react with sulfate ions, depositing PbS04 on the electrode. When the battery is fully discharged, the cathode (positive plate) and anode (negative plate) are essentially converted to PbSO4 (solid). A reverse voltage is applied to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/08
CPCH01M10/08Y02E60/10
Inventor 韩峰欧阳万忠李亚非周强华李乃军秦应林
Owner TIANNENG GRP HENAN ENERGY TECH
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