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A kind of preparation method of lead oxide-carbon composite material

A technology of carbon composite materials and lead oxide, applied in structural parts, electrical components, battery electrodes, etc., can solve the problems of unsatisfactory hydrogen evolution suppression effect, achieve the effects of overcoming inconsistency, improving cycle life, and convenient operation

Active Publication Date: 2017-04-19
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the invention provides a preparation method of lead oxide-carbon composite material, the purpose of which is to increase the acidic functional groups on the surface of lead oxide-carbon composite material by pickling, thereby solving the problem of existing Technical Problems of Unsatisfactory Hydrogen Evolution Suppression Effect of Lead Oxide-Carbon Composite Materials

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  • A kind of preparation method of lead oxide-carbon composite material
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preparation example Construction

[0029] The preparation method of lead oxide-carbon composite material provided by the invention comprises the following steps:

[0030] (1) For each gram of carbon material, add 300 ml of 0.05M to 0.5M lead oxide precursor solution, mix evenly and adjust the pH value between 8.5-9.0, and dry the solid phase after solid-liquid separation to obtain a raw material mixture;

[0031] The carbon material is one or more of activated carbon, carbon black, carbon nanotubes, and graphene oxide; the lead oxide precursor is a divalent lead ion solution, such as lead nitrate solution, lead acetate solution; the pH value can be adjusted Use ammonia water or strong alkali solution, such as potassium hydroxide solution, sodium hydroxide solution.

[0032] (2) calcining the raw material mixture obtained in step (1) at 500° C. to 800° C. for 2 hours under a protective gas atmosphere to obtain a lead oxide-carbon composite;

[0033] (3) The lead oxide-carbon composite obtained in the step (2), ...

Embodiment 1

[0038] A preparation method of lead oxide-carbon composite material, comprising the following steps:

[0039] (1) For each gram of carbon material, add 300ml of 0.05M lead nitrate solution to mix evenly and adjust the pH value between 8.5-9.0, and dry the solid phase after solid-liquid separation to obtain the raw material mixture;

[0040] The carbon material is carbon black; the lead oxide precursor is lead nitrate solution; and ammonia water is used to adjust the pH value.

[0041] (2) calcining the raw material mixture obtained in step (1) at 500° C. for 2 hours under nitrogen to obtain a lead oxide-carbon composite;

[0042] (3) The lead oxide-carbon composite obtained in step (2) is fully washed by adding 100ml of hydrochloric acid solution with a hydrogen ion content of 5M at 25°C, rinsed until the pH value is neutral, and dried to obtain the obtained lead oxide-carbon composites.

[0043] The specific steps of full washing are as follows: use magnetic stirring for 30...

Embodiment 2

[0048] A preparation method of lead oxide-carbon composite material, comprising the following steps:

[0049] (1) For each gram of carbon material, add 300ml of 0.05M lead nitrate solution to mix evenly and adjust the pH value between 8.5-9.0, and dry the solid phase after solid-liquid separation to obtain the raw material mixture;

[0050] The carbon material is carbon black; the lead oxide precursor is lead nitrate solution; and ammonia solution is used to adjust the pH value.

[0051] (2) calcining the raw material mixture obtained in step (1) at 500° C. for 2 hours under nitrogen to obtain a lead oxide-carbon composite;

[0052] (3) The lead oxide-carbon composite obtained in step (2) is fully washed by adding 100ml of hydrochloric acid solution with a hydrogen ion content of 5M at 50°C, rinsed until the pH value is neutral, and dried to obtain the obtained lead oxide-carbon composites.

[0053] The specific steps of full washing are as follows: use magnetic stirring for...

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Abstract

The invention discloses a preparation method of a lead oxide-carbon composite material. The method comprises the following steps: (1) adding 300ml of 0.05-0.5M lead oxide precursor solution to each gram of carbon materials, mixing the lead oxide precursor solution and the carbon materials evenly, adjusting the pH value to be 8.5-9.0 and carrying out solid-phase drying after solid-liquid separation to obtain a raw material mixture; (2) burning the raw material mixture obtained in the step (1) at 500-800 DEG C in a protective gas atmosphere for 2 hours to obtain a lead oxide-carbon compound; and (3) adding the lead oxide-carbon compound obtained in the step (2) to 100ml of acid solution with the hydrogen ion content of 5M at 25-80 DEG C, fully washing and rinsing the product until the pH value is neutral and drying the product to prepare the lead oxide-carbon composite material. The method is simple; the operation is convenient; and by the compound synthesized by a high-temperature pyrolysis method and an acid-washing method, the micro-structure and the functional group on the surface are changed when PbO and the carbon material are compounded.

Description

technical field [0001] The invention belongs to the field of energy materials, and more specifically relates to a preparation method of a lead oxide-carbon composite material. Background technique [0002] Lead-acid batteries are widely used in power batteries due to their low cost, mature technology, and good safety performance. However, its operation under high rate partial state of charge (HRPSoC) will cover a large amount of irreversible PbSO on the surface of the negative electrode. 4 As a result, the utilization rate of the active material is reduced, resulting in a reduction in the cycle life of the battery. It is to add carbon materials to the negative electrode of lead-acid batteries, and use its high specific surface area, good electrical conductivity and large electric double layer capacitance to improve the HRPSoC cycle life of the battery. [0003] Chinese patent CN 102891285A discloses a method for chemically doping Pb on the surface of negative electrode car...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/56H01M4/57H01M4/62
CPCH01M4/56H01M4/57H01M4/628Y02E60/10
Inventor 杨欢邱于兵郭兴蓬
Owner HUAZHONG UNIV OF SCI & TECH
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