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Multi-element co-doped activated carbon composite material for negative electrode of lead-carbon battery, preparation method of multi-element co-doped activated carbon composite material and lead-carbon battery

A composite material and activated carbon technology, which is applied in battery electrodes, lead-acid batteries, electrical components, etc., can solve the problems of complex preparation, ineffective solution to the problem of dehydration of lead-carbon batteries, and in-situ doping, and achieve simplified preparation The effect of the process

Active Publication Date: 2020-06-23
SHANDONG OBO NEW MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the hydrogen evolution inhibitor, activated carbon, and lead powder are simply mixed mechanically without in-situ doping, and the amount of the modifier added is only 0.05% to 5% of the lead powder, and the actual contact between the modifier and the activated carbon is very little. , which greatly weakens the influence mechanism of modifiers on increasing the hydrogen evolution potential of activated carbon, so simply adding hydrogen evolution inhibitors does not effectively solve the problem of water loss in lead-carbon batteries; and the preparation method of activated carbon doped with atoms on the surface uses activated carbon as raw material , by adding other atomic compounds for doping, the preparation is more complicated, the cost of activated carbon is higher, and the element doped by activated carbon is relatively simple, which will lead to poor hydrogen evolution inhibition effect

Method used

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  • Multi-element co-doped activated carbon composite material for negative electrode of lead-carbon battery, preparation method of multi-element co-doped activated carbon composite material and lead-carbon battery
  • Multi-element co-doped activated carbon composite material for negative electrode of lead-carbon battery, preparation method of multi-element co-doped activated carbon composite material and lead-carbon battery
  • Multi-element co-doped activated carbon composite material for negative electrode of lead-carbon battery, preparation method of multi-element co-doped activated carbon composite material and lead-carbon battery

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preparation example Construction

[0062] The present invention also provides a method for preparing a multi-element co-doped activated carbon composite material, comprising the following steps:

[0063] 1) After grinding and mixing the activated carbon precursor and the heteroatom compound, a mixed material is obtained;

[0064] 2) After remixing the mixed material obtained in the above steps with an activator, activate it under the condition of protective gas to obtain a multi-element co-doped activated carbon composite material.

[0065] In the present invention, the selection, composition and structure of the materials in the above preparation method, as well as the corresponding optimization principles, can preferably correspond to the selection, composition and structure of the aforementioned multi-element co-doped activated carbon composite material, and the corresponding optimization principles, No more details here.

[0066] In the present invention, firstly, the activated carbon precursor and the het...

Embodiment 1

[0087] Weigh 6g of hexamethyltrimeric cyclophosphazene and 100g of petroleum coke for ball milling pre-dispersion, use a jet mill to pulverize the pre-dispersion mixture until the particle diameter D50 is 15 μm, and mix the pulverized material and activator potassium hydroxide according to 1: Mix at a mass ratio of 3, mix evenly, heat up to 700°C in an activation furnace with nitrogen protection for 2 hours of activation treatment, cool to room temperature after the reaction, use dilute hydrochloric acid to remove the activator and impurities in the obtained carbon material, and deionize Washing with water until neutral, drying after washing to obtain nitrogen and phosphorus co-doped activated carbon.

[0088] The nitrogen and phosphorus co-doped activated carbon prepared in Example 1 of the present invention was characterized.

[0089] see figure 1 , figure 1 SEM scanning electron micrograph of the nitrogen and phosphorus co-doped activated carbon prepared in Example 1 of t...

Embodiment 2

[0100] Weigh 15g trimeric cyclophosphazene and 100g petroleum coke for pre-dispersion by ball milling, use a jet mill to pulverize the pre-dispersion mixture until the particle size D50 is 25μm, mix the pulverized material and the activator zinc chloride according to the mass of 1:4 After mixing evenly, heat up to 650°C in an activation furnace protected by nitrogen for 4 hours of activation treatment. After the reaction, cool to room temperature, use dilute hydrochloric acid to remove the activator and impurities in the obtained carbon material, and wash with deionized water until Neutral, washed and dried to obtain nitrogen and phosphorus co-doped activated carbon.

[0101] The nitrogen and phosphorus co-doped activated carbon prepared in Example 2 of the present invention was characterized.

[0102] see figure 2 , figure 2 SEM scanning electron micrograph of the nitrogen and phosphorus co-doped activated carbon prepared in Example 2 of the present invention.

[0103] T...

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Abstract

The invention provides a multi-element co-doped activated carbon composite material. The multi-element co-doped activated carbon composite material comprises activated carbon and hydrogen evolution inhibiting heteroatoms doped on the activated carbon, wherein the hydrogen evolution inhibiting heteroatoms are two or three of N, P and F; and the hydrogen evolution inhibiting heteroatoms are providedby a heteroatom compound. According to the invention, the heteroatom compound is used as a source of hydrogen evolution inhibiting atoms and doped with two or three hydrogen evolution inhibiting heteroatoms at the same time, so that the heteroatom compound is rich in phosphorus, nitrogen and fluorine elements, not only can be used as a phosphorus source and a nitrogen source, but also can be usedas a fluorine source. The heteroatom compound is added in the process of preparing the activated carbon, a mixture is pyrolyzed in one step while high-temperature activation is performed, and the multi-element doped activated carbon is obtained, so that the preparation process is simplified, various heteroatoms can be uniformly dispersed on the surface and in porous channels of the activated carbon, the function of inhibiting hydrogen evolution is effectively improved, and lone pair electrons on the heteroatoms can increase the charge density of the carbon material, so that the electrical conductivity and the wettability of an electrolyte solution are improved.

Description

technical field [0001] The invention belongs to the technical field of lead-carbon materials, and relates to a multi-element co-doped activated carbon composite material and a preparation method thereof, a lead-carbon battery, and in particular to a multi-element co-doped activated carbon composite material for the negative electrode of a lead-carbon battery and a preparation method thereof , Lead-carbon battery. Background technique [0002] With the continuous advancement of science and technology, the global energy storage battery market is growing rapidly. Lead-acid batteries have obvious advantages in terms of cost performance, safety, low-temperature performance, production and recycling processes, and have become the battery type with the largest market share in the world. However, the disadvantages of lead-acid batteries such as low specific energy, large volume, difficulty in fast charging and short cycle life (300-800 times) limit the development and application o...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/583H01M4/62H01M10/06
CPCH01M4/362H01M4/583H01M4/62H01M4/628H01M10/06Y02E60/10
Inventor 张聪郑申棵赵永彬马立军
Owner SHANDONG OBO NEW MATERIAL CO LTD
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