Colloid electrolyte for lead-acid battery and preparation method thereof

A technology of colloidal electrolyte and lead-acid battery, applied in the direction of lead-acid battery, lead-acid battery construction, final product manufacturing, etc., can solve the problem of increasing the corrosion resistance of lead and its alloys, reducing battery capacity, and poor low-temperature performance of the battery ( reduce problems such as increasing charge acceptance, inhibit hydrogen evolution and oxygen evolution reaction, and make the compounding method simple and easy.

Inactive Publication Date: 2011-10-05
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, researchers such as Badawy pointed out that although the addition of phosphoric acid prevents the self-discharge of the positive electrode, the addition of phosphoric acid reduces the initial cycle capacity of the battery, especially when the concentration of phosphoric acid is high, the low-temperature performance of the battery is poor (reducing the PbSO 4 Oxidized to PbO 2 speed), while replacing phosphoric acid with boric acid increased the PbO 2 / PbSO 4 The speed of the redox pair increases the corrosion resistance of lead and its alloys, and solves the problems encountered when adding phosphoric acid as an additive to batteries

Method used

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  • Colloid electrolyte for lead-acid battery and preparation method thereof
  • Colloid electrolyte for lead-acid battery and preparation method thereof
  • Colloid electrolyte for lead-acid battery and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] ①Preparation of 0.05% hydroxyethyl cellulose aqueous solution

[0044] Add a certain amount of hydroxyethyl cellulose powder to a dispersing bucket filled with a certain volume of deionized water, and stir at a low speed while adding. Pour into a volumetric flask.

[0045] ② Prepare a colloidal electrolyte containing 0.001% HEC aqueous solution;

[0046] A silica sol colloidal electrolyte containing HEC was prepared. The preparation method is as follows, take 260 mL of sulfuric acid solution with a mass fraction of 41.5%, add 50 g of silica sol with a mass fraction of 40% silica (produced by Shenzhen Huadao Industrial Co., Ltd.) under stirring at 300 r / min, and then add 8.2 mL of HEC After the material is added, the above system is dispersed at 1500 r / min (dispersion time is 30 minutes). In the obtained colloidal electrolyte, the content of hydroxyethyl cellulose is 0.001% (w / w), the net content of silica is 5% (w / w), and the content of sulfuric acid is 1.28 g / mL.

...

Embodiment 2

[0049] ①Preparation of 0.05% hydroxyethyl cellulose aqueous solution

[0050] Add a certain amount of hydroxyethyl cellulose powder to a dispersing bucket filled with a certain volume of deionized water, and stir at a low speed while adding. Pour into a volumetric flask.

[0051] ② Prepare a colloidal electrolyte containing 0.003% HEC aqueous solution;

[0052] The preparation method is as follows: take 244 mL of sulfuric acid solution with a mass fraction of 43.6%, add 50 g of silica sol with a mass fraction of 40% silica under stirring at 300 r / min, and then add 24.67 mL of HEC aqueous solution. min to disperse the above system (dispersion time 30 minutes). In the obtained colloidal electrolyte, the content of hydroxyethyl cellulose is 0.003% (w / w), the net content of silica is 5% (w / w), and the content of sulfuric acid is 1.28 g / mL.

[0053] ③The fluidity and viscosity test were carried out immediately after the preparation of the colloidal electrolyte; the electrochemic...

Embodiment 3

[0055] ①Preparation of 0.05% hydroxyethyl cellulose aqueous solution

[0056] Add a certain amount of hydroxyethyl cellulose powder to a dispersing bucket filled with a certain volume of deionized water, and stir at a low speed while adding. Pour into a volumetric flask.

[0057] ② Prepare a colloidal electrolyte containing 0.005% HEC aqueous solution;

[0058] A silica sol colloidal electrolyte containing HEC was prepared. The preparation method is as follows: take 229 mL of sulfuric acid solution with a mass fraction of 45.8%, add 50 g of silica sol with a mass fraction of silica of 40% under stirring at 300 r / min, and then add 41 mL of HEC aqueous solution. After the material is added, 1500 r / min The above system was dispersed (dispersion time 30 minutes). In the obtained colloidal electrolyte, the content of hydroxyethyl cellulose is 0.005% (w / w), the net content of silica is 5% (w / w), and the content of sulfuric acid is 1.28 g / mL.

[0059] ③The fluidity and viscosity ...

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Abstract

The invention belongs to the technical field of colloid lead-acid battery electrolytes and relates to a novel colloid electrolyte for a lead-acid battery and a preparation method thereof. In the colloid electrolyte, a silica sol is taken as a gel and contains 0.001%-0.009% of hydroxyethyl cellulose. The preparation method comprises the following steps: 1, preparing a hydroxyethyl cellulose water solution with the mass percent of 0.05%-0.5%; 2, preparing silicon dioxide into a silica sol and adding the silica sol to a sulfuric acid solution as well as stirring; and 3, adding the hydroxyethyl cellulose water solution in the step 1 to the solution obtained in the step 2, and dispersing. The hydroxyethyl cellulose is adopted to be an additive of the silica solution colloid electrolyte, thus playing a thickening role in a pure silica solution electrolyte, avoiding the defect of hydration layering of the pure silica solution colloid electrolyte, improving the stability of the pure silica solution colloid electrolyte, inhibiting the colloid electrolyte from hydrogen evolution and oxygen evolution to reduce self discharge, increasing the discharge capacity of a lead negative electrode, improving the charge acceptance of the lead negative electrode, restraining sulfation of the negative electrode and being beneficial to prolonging the service life of the battery.

Description

technical field [0001] The invention relates to the technical field of colloidal lead-acid battery electrolytes, in particular to a colloidal electrolyte for lead-acid batteries and a preparation method thereof. Background technique [0002] Lead-acid batteries have a history of more than 150 years. Although they are old horses, they are old and strong. According to statistics in 2004, lead-acid batteries account for more than 50% of the total share of all secondary batteries, occupying the absolute dominant position of secondary batteries. [0003] Colloidal lead-acid batteries are an innovative transformation of traditional lead-acid batteries. Because colloidal electrolytes have the advantages of not flowing electrolyte, not easy to leak acid, effectively reducing self-discharge, and extending battery life, colloidal batteries are widely used in electric power, telecommunications, Communication power system, military communication station, electric vehicle, solar and win...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/12H01M10/10
CPCY02E60/126Y02E60/10Y02P70/50
Inventor 陈红雨潘珂
Owner SOUTH CHINA NORMAL UNIVERSITY
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