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Graphene electrolyte for lead-acid storage battery and preparation method of graphene electrolyte

A lead-acid battery and graphene technology, applied in the direction of lead-acid batteries, acid electrolytes, aqueous electrolytes, etc., can solve the problems of poor acid-fixing ability, large electrolyte internal resistance, short service life, etc., to increase the reaction capacity, increase Activation energy, effect of enhancing flow activity

Active Publication Date: 2016-06-15
江西力之奇新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a graphene electrolyte for lead-acid batteries that improves battery performance and improves battery cycle life in order to solve the defects of large electrolyte internal resistance, poor acid-fixing ability and short service life of existing lead-acid batteries

Method used

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Examples

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Effect test

Embodiment 1

[0029] A kind of lead-acid battery graphene electrolyte, is made up of the component of following mass percent: 0.2% graphene aqueous solution, 0.8% sodium sulfate, 0.1% stannous sulfate, 5% silica sol, 0.5% sodium carboxymethyl cellulose, The remainder is a sulfuric acid solution, and the graphene content of the graphene aqueous solution is 0.5×10 -3 g / ml; SiO in the silica sol 2 The mass percentage content is 10%.

[0030] Graphene is modified before being configured into graphene aqueous solution and comprises the following steps:

[0031] 1) Mix graphene particles, sodium dibutylnaphthalene sulfonate solution with a mass concentration of 15% and acid solution according to a solid-liquid ratio of 1g: 45mL: 18mL, stir and mix for 10min at a controlled temperature of 95°C, filter, and water and no Wash with water and ethanol, and dry in vacuum at 180°C for 15 minutes to obtain primary modified graphene particles;

[0032] 2) Mix primary modified graphene particles with che...

Embodiment 2

[0039] A kind of lead-acid storage battery graphene electrolyte, is made up of the component of following mass percent: 1.5% graphene aqueous solution, 1.5% potassium sulfate, 0.8% sodium sulfate, 0.3% stannous sulfate, 20% silica sol, 3% carboxymethyl Sodium cellulose, the balance is a sulfuric acid solution, and the graphene content of the graphene aqueous solution is 7 × 10 -3 g / ml; SiO in the silica sol 2 The mass percentage content is 15%.

[0040] Graphene is modified before being configured into graphene aqueous solution and comprises the following steps:

[0041]1) Mix graphene particles, sodium dibutylnaphthalene sulfonate solution with a mass concentration of 18% and acid solution at a solid-liquid ratio of 1g: 50mL: 20mL, stir and mix for 15min at a controlled temperature of 110°C, filter, and water and no Wash with water and ethanol, and dry in vacuum at 200°C for 20 minutes to obtain primary modified graphene particles;

[0042] 2) Mix the primary modified grap...

Embodiment 3

[0049] A kind of lead-acid storage battery graphene electrolyte, is made up of the component of following mass percent: 5% graphene aqueous solution, 1.5% sodium sulfate, 1.5% potassium sulfate, 0.8% zinc sulfate, 1.2% aluminum sulfate, 0.7% stannous sulfate , 30% silica sol, 6% sodium carboxymethyl cellulose, and the remainder is sulfuric acid solution, and the graphene content of the graphene aqueous solution is 10×10 -3 g / ml; SiO in the silica sol 2 The mass percentage composition is 23%.

[0050] Graphene is modified before being configured into graphene aqueous solution and comprises the following steps:

[0051] 1) Mix graphene particles, sodium dibutylnaphthalene sulfonate solution with a mass concentration of 20% and acid solution at a material-liquid ratio of 1g: 55mL: 23mL, stir and mix for 25min at a controlled temperature of 120°C, filter, and water and no Washing with water and ethanol, and vacuum drying at 220°C for 25 minutes to obtain primary modified graphen...

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Abstract

The invention discloses a graphene electrolyte for a lead-acid storage battery. The graphene electrolyte comprises the following components: a graphene water solution, sulfate, stannous mono-sulphate, silica sol, sodium carboxymethylcellulose and the balance of a sulfuric acid solution. With the graphene water solution as an electrolyte additive, the flow activity of the electrolyte can be strengthened; the reaction capacity of the electrolyte and an active material is improved; the activation energy of the electrode surface is increased; the obstacle of a lead sulfate film on the lead surface to electron conduction is reduced; the oxygen cycle efficiency is improved; sulfation of particles are reduced; and the service lifetime of a deep cycle is prolonged.

Description

technical field [0001] The invention relates to the field of lead-acid batteries, in particular to a graphene electrolyte for lead-acid batteries and a preparation method thereof. Background technique [0002] Lead-acid batteries have the advantages of reliable performance, long storage life, low price, and easy availability of raw materials. They have been widely used in various fields, especially power applications, telecommunications fields, backup power supplies, and energy storage power supplies. The five major components of a lead-acid battery are the positive electrode, the negative electrode, the separator, the electrolyte, and the battery case, among which the electrolyte is one of the main factors affecting battery performance. Ordinary electrolytes have high internal resistance, poor acid-fixing ability, and short service life. Therefore, selecting and using appropriate electrolyte additives can greatly improve battery performance. [0003] As an important part o...

Claims

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Application Information

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IPC IPC(8): H01M10/08
CPCH01M10/08H01M2300/0011Y02E60/10
Inventor 吴秋菊杨新新周明明戴贵平吴亮柯娃石沫
Owner 江西力之奇新能源科技有限公司
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