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Lead sulfate-graphene composite electrode material and lead-acid battery negative electrode lead paste containing same

A graphene composite and electrode material technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of short life, poor negative electrode high-rate discharge cycle performance, etc., achieve good retention rate, good conductivity, and reduce sulfate. the effect of

Inactive Publication Date: 2011-09-28
HARBIN INST OF TECH
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of poor negative maximum rate discharge cycle performance and short life of existing electric vehicles and energy storage lead-acid batteries. The present invention provides a lead sulfate-graphene composite electrode material and its containing Lead-acid battery negative electrode paste

Method used

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  • Lead sulfate-graphene composite electrode material and lead-acid battery negative electrode lead paste containing same
  • Lead sulfate-graphene composite electrode material and lead-acid battery negative electrode lead paste containing same
  • Lead sulfate-graphene composite electrode material and lead-acid battery negative electrode lead paste containing same

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specific Embodiment approach 1

[0018] Specific embodiment 1: This embodiment is a lead sulfate-graphene composite electrode material, which is lead sulfate supported on graphene, and the mass ratio of lead sulfate to graphene is 0.1-10:1.

[0019] In this embodiment, the graphene is a commercially available product or is prepared according to an existing public preparation method.

[0020] The preparation method of the lead sulfate-graphene composite electrode material of this embodiment is as follows: under the conditions of ultrasonic stirring at 25-70°C and a frequency of 10-30KHz, the lead acetate solution is added to the graphene suspension and ultrasonically vibrated for 30- 60min to obtain the mixed solution; while stirring, add sulfuric acid solution dropwise to the mixed solution. After the addition is completed, continue to stir for 30-60 minutes, filter to obtain the solid, and then dry the solid at 40-80℃ for 3-6h, The lead sulfate-graphene composite electrode material is obtained, wherein the ratio ...

specific Embodiment approach 2

[0025] Embodiment 2: The difference between this embodiment and the first embodiment is that the mass ratio of lead sulfate to graphene is 0.5-8:1. Other parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0026] Specific embodiment three: This embodiment is different from specific embodiment one in that the mass ratio of lead sulfate to graphene is 0.8-6:1. Other parameters are the same as in the first embodiment.

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Abstract

The invention relates to an electrode material and a lead-acid battery negative electrode lead paste containing the same, in particular to a lead sulfate-graphene composite electrode material and a lead-acid battery negative electrode lead paste containing the same, solving the problems of the traditional electric vehicles and energy-storage lead-acid battery, such as poor high rate discharging cycling performance of the negative electrode and short service life. In the lead sulfate-graphene composite electrode material, lead sulfate is loaded on graphene, wherein the weight ratio of lead sulfate to graphene is (0.1-10):1. The mass of the composite electrode material in the lead-acid battery negative electrode lead paste is 0.1% to 10% of the mass of lead powder. The composite electrode material has reversible oxidation-reduction performance and capacitance performance, and can reduce the hydrogen-evolving potential of graphene, thereby providing more lead sulfate growth points for the lead-acid negative electrode, suppressing the sulfation of the negative electrode of a lead-acid battery in the high rate charging-discharging process, and prolonging the service life of the lead-acid super battery. With the first pulse discharging cycling frequency of more than 6,000 times, the negative electrode lead paste is suitable for the negative electrode material of electric vehicles and energy-storage lead-acid batteries.

Description

Technical field [0001] The invention relates to an electrode material and a lead-acid battery negative lead paste containing the electrode material. Background technique [0002] One of the biggest challenges facing mankind in the 21st century is environmental issues. Among them, automobile exhaust pollution and carbon dioxide emissions are increasingly threatening the human living environment. The key to solving this severe challenge lies in the research and development of electric vehicles and the discovery of green energy. For electric vehicles and green energy, the performance of high-power batteries is extremely critical. Super lead-acid batteries have the advantages of high discharge power, good cycle performance, and low price. In the market of electric vehicles and energy storage backup power supplies, it has broad application prospects and potential huge economic benefits, and has become a research focus. At present, there are two types of super lead-acid batteries, o...

Claims

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Application Information

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IPC IPC(8): H01M4/58
CPCY02E60/12Y02E60/10
Inventor 王殿龙王林朱俊生胡新春任安福陈飞
Owner HARBIN INST OF TECH
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