Monodisperse atom cluster-activated carbon composite material and application thereof in lead-carbon battery

A composite material and lead-carbon battery technology, applied in lead-acid batteries, lead-acid battery electrodes, battery electrodes, etc., can solve the problems of poor controllability of product performance, difficulty in suppressing hydrogen evolution, randomness, etc., and achieve high binding force and high content The effect of high concentration and small size

Active Publication Date: 2022-01-18
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The common addition method of inhibiting hydrogen evolution agent is to introduce high hydrogen evolution overpotential elements into the surface and pores of carbon materials through dissolution-adsorption-recrystallization. This method can play the role of inhibiting hydrogen evolution agent to a certain extent, but due to Inhibit the randomness of the crystallization process of the hydrogen evolution agent, making it difficult for it to maximize its ability to inhibit hydrogen evolution
In addition, only adding a single type of hydrogen evolution inhibitor is not only costly but also poorly controllable in product performance

Method used

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  • Monodisperse atom cluster-activated carbon composite material and application thereof in lead-carbon battery
  • Monodisperse atom cluster-activated carbon composite material and application thereof in lead-carbon battery

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Step 1, adopt the following method to prepare alloy type monodisperse atomic cluster-activated carbon composite material:

[0033] 1) Prepare liquid A:

[0034] 300mg indium nitrate and 300mg lead nitrate and 5ml 40wt% polysodium methacrylate (PMAA-Na) solution are jointly dissolved in 100ml ethylene glycol (EG);

[0035] 2) Prepare B slurry:

[0036] Add liquid A dropwise to 10g of activated carbon material while stirring to form B slurry state; the specific surface area of ​​activated carbon is 1800m 2 / g;

[0037] 3) Put the B slurry in a stirring state at 160°C, and keep stirring for 6 hours. The surface area of ​​the activated carbon used is about 18000m2 after testing and calculation. 2 ;

[0038] 4) Drying at 80°C for 12 hours to obtain an alloy-type monodisperse atomic cluster-activated carbon composite material. The morphology of the prepared alloy-type monodisperse cluster-activated carbon composites is as follows: figure 1 , it can be seen that the size...

Embodiment 2

[0041] Lead-carbon battery: according to the requirement of embodiment 1, without changing other conditions, polysodium methacrylate (PMAA-Na) is replaced by adding the same volume of polyethylene glycol dimethacrylate of the same concentration. Take 0.21 g of the prepared negative electrode active material of the lead-carbon battery as the working electrode, 0.36 g of the positive electrode active material as the counter electrode, and take the commercial mercury-mercurous sulfate reference electrode for the LSV test of the three-electrode system. The test range is (-1) V to (-1.6)V, the test results are as follows figure 2 . The morphology of the prepared monodisperse atomic cluster-activated carbon composite shows that the size of the atomic cluster is about 1nm.

Embodiment 3

[0043] According to the requirements of Example 1, without changing other conditions, the addition amount of indium nitrate was changed to 600 mg. The internal hybrid battery can run 18,000 laps under this condition. Compared with the test results of ordinary lead-acid batteries with the same lead element content under the same test conditions (7200 cycles), the life of the internal mixed lead-carbon battery can reach 2.5 times the life of the traditional lead-acid battery. The morphology of the alloy-type monodisperse atomic cluster-activated carbon composite material shows that the size of the atomic cluster is about 3nm.

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Abstract

The invention relates to a lead-carbon battery, in particular to a monodisperse atom cluster-activated carbon composite material. The material can be prepared by the following method which comprises the steps: 1) preparing a solution A: blending soluble salts of two or more than three high hydrogen evolution overpotential elements and a high-molecular polymer aqueous solution into a weak reducing agent organic solvent to form the solution A; 2) preparing a slurry B: dropwise adding the liquid A into a porous activated carbon material, and stirring to form a slurry B state; 3) placing the slurry B in a stirring state at the temperature of 80-240 DEG C, and continuously performing stirring for 0.5-24 hours; 4) performing drying to obtain the monodisperse atom cluster-porous activated carbon composite material. The problem of serious hydrogen evolution after the carbon material is added into the lead-carbon battery is solved by utilizing the hydrogen evolution inhibiting agent.

Description

technical field [0001] The invention relates to the field of lead-carbon batteries, in particular to the fields of energy storage batteries and start-stop batteries. Background technique [0002] The biggest problem currently facing lead-acid batteries is their short cycle life. The key to solving this problem lies in how to improve the electrode reaction kinetics rate of lead-acid batteries and reduce the sulfation state of batteries. Lead-carbon battery is currently the easiest new type of battery to replace lead-acid batteries. Its main features include long cycle life, low cost, and a relatively complete industrial production process. The lead-carbon battery is to add a certain amount of activated carbon and conductive carbon materials to the negative plate of the lead-acid battery to eliminate the problem of sulfation during the operation of the battery to the greatest extent, thereby effectively improving the service life of the battery. [0003] However, the introduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/583H01M4/20H01M10/06C01B32/354
CPCH01M4/628H01M4/583H01M4/20H01M10/06C01B32/354Y02E60/10
Inventor 席耀宁李先锋阎景旺张华民
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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