Anode material of lead-acid battery and its production method

A technology for positive electrode materials and lead-acid batteries, applied in the direction of lead-acid battery electrodes, battery electrodes, circuits, etc., can solve problems such as loss of function, and achieve the effects of increasing utilization, improving formation efficiency, and improving cycle performance

Inactive Publication Date: 2008-08-20
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these additions showed good performance at the beginning of the battery cycle, due to the harsh application environment inside the lead-acid battery, they quickly lost their effect as the cycle progressed.

Method used

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  • Anode material of lead-acid battery and its production method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Mix 50g of concentrated sulfuric acid and 25g of concentrated nitric acid, then add 0.1g of sodium dodecylbenzenesulfonate and 0.1g of carbon nanotubes, stir and mix, then sonicate for 1 hour, add deionized water to dilute and suction filter until neutral, bake at 60°C 8h, to obtain mixed acid ultrasonic treatment of carbon nanotubes; then put the mixed acid ultrasonic treatment of carbon nanotubes in a quartz boat with a diameter of 100mm, under the protection of nitrogen atmosphere, at 800 ° C, keep warm for 8h, cool with the furnace, and obtain medium and low temperature graphitization Dealing with carbon nanotubes.

[0025] 2) Combine 0.1g short fiber with 35g PbO 2 Powder and 14.9g of lead powder were mixed evenly.

[0026] 3) Put the mixture of medium and low temperature graphitized carbon nanotubes and step 2) into an agate ball mill jar at a mass ratio of 1:99, add 3ml of absolute ethanol dropwise, and ball mill at a speed of 200r / min for 2 hours to obtain t...

Embodiment 2

[0029] 1) Mix 40g of concentrated sulfuric acid and 10g of concentrated nitric acid, then add 0.12g of polyvinyl alcohol and 0.1g of carbon nanotubes, stir and mix, then sonicate for 0.5h, add deionized water to dilute and filter until neutral, bake at 80°C for 10h, and obtain mixed acid sonication Treat the carbon nanotubes; place the carbon nanotubes that have been ultrasonically treated with mixed acid in a quartz boat with a diameter of 100mm, and keep them at 900°C for 10h under the protection of a nitrogen atmosphere, and cool with the furnace to obtain graphitized carbon nanotubes.

[0030] 2) Combine 1g short fiber with 45g PbO 2 Powder and 4g lead powder are mixed evenly.

[0031] 3) Put the mixture of medium and low temperature graphitized carbon nanotubes and step 2) into an agate ball mill jar at a mass ratio of 0.2:99.8, add 5ml of absolute ethanol dropwise therein, and ball mill at a speed of 200r / min for 3 hours to obtain the apparent density 3.8g / cm 3 positiv...

Embodiment 3

[0034] 1) Mix 50g of concentrated sulfuric acid and 50g of concentrated nitric acid, then add 0.2g of sodium dodecylbenzenesulfonate and 0.4g of carbon nanotubes, stir and mix, then sonicate for 2 hours, add deionized water to dilute and filter until neutral, and bake at 100°C After 12 hours, the mixed acid ultrasonically treated carbon nanotubes were obtained; then the carbon nanotubes treated by mixed acid ultrasonically were placed in a quartz boat with a diameter of 100mm, kept at 1200°C for 12h under the protection of a nitrogen atmosphere, and cooled with the furnace to obtain graphitized carbon nanotubes. nanotube.

[0035] 2) Combine 0.5g short fiber with 30g PbO 2 Powder and 19.5g of lead powder were mixed evenly.

[0036] 3) Put the mixture of medium and low temperature graphitized carbon nanotubes and step 2) into an agate ball mill jar at a mass ratio of 2:98, add 4ml of absolute ethanol dropwise therein, and ball mill at a speed of 400r / min for 1 hour to obtain t...

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Abstract

The present invention discloses an anode material of lead-acid battery, the components and weight percentage content are: 0.2-2% of carbon nano-tube, 0.2-2% of polyacrylonitrile short fiber, 60-90% of PbO2, others is ceruse. Graphitized process carbon nano-tube as anode additive, not only resists rigor corruption of electrochemical circumstance in lead-acid battery, adds specific surface area of anode active material, enhance charge and discharge capability of electrode, improves circle capability, enhances formation efficiency, but also improve the utilization rate of active material and discharging capacity of lead-acid battery. In the conditions of 0.5c-10c current, the utilization rate of active material can be improved of 15-25%. The present invention has simple technique, low cost and is suitable for large-scare production and application.

Description

technical field [0001] The invention relates to a positive electrode material of a lead storage battery and a preparation method thereof. Background technique [0002] At present, the domestic and foreign academic research circles of lead-acid batteries agree that the main problems of lead-acid batteries are: low utilization rate of active materials (30-35% for positive pole and 40-45% for negative pole), low specific energy of battery (generally 30-35wh / kg). In recent years, in order to reduce the resistance of the positive electrode and improve the utilization rate of the active material of the positive electrode, amorphous carbon and graphite have been used as additives. Although these additions showed good performance at the beginning of the battery cycle, due to the harsh application environment inside the lead-acid battery, they quickly lost their effect as the cycle progressed. At present, there are many studies on the positive additives of lead storage batteries: ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/56H01M4/62H01M4/16
CPCY02E60/126Y02E60/10
Inventor 谭俊军张孝彬王杏花刘芙
Owner ZHEJIANG UNIV
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