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Lead-carbon battery composite negative electrode additive, preparation method and applications thereof

A lead-carbon battery and additive technology, which is applied to lead-acid battery electrodes, battery electrodes, circuits, etc., can solve the problems of low surface area and decreased specific capacity, and achieve the effects of increasing specific surface area, low hydrogen evolution, and high activity

Active Publication Date: 2018-06-05
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the theoretical specific capacity of graphene is high, the actual available surface area of ​​graphene is much lower than the theoretical value due to the ease of re-stacking of graphene flakes, resulting in a significant drop in its specific capacity.

Method used

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  • Lead-carbon battery composite negative electrode additive, preparation method and applications thereof
  • Lead-carbon battery composite negative electrode additive, preparation method and applications thereof
  • Lead-carbon battery composite negative electrode additive, preparation method and applications thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0053] Weigh 0.3 g of analytically pure cerium nitrate, add it into 100 mL of deionized water, stir well until completely dissolved, and obtain a cerium nitrate solution. Weigh 20 g of analytically pure disodium ethylenediaminetetraacetic acid (EDTA), add it into 300 mL of deionized water, stir well until it is completely dissolved, and obtain an EDTA solution. Add the prepared cerium nitrate solution into the EDTA solution and stir for 30 minutes to make the cerium ions fully complexed by EDTA. Then, 7.8 g of graphene oxide dispersion liquid with a concentration of 3.86 wt % was added to the above solution, stirred while heating, and water was removed to obtain composite additive precursor powder. Put the obtained additive precursor powder in N 2 Calcined at 800° C. for 5 h in a protective atmosphere to obtain a graphene-based composite additive. 100g of lead powder, 1.5g of graphene-based composite additives, 1.4g of barium sulfate, and 0.05g of short polypropylene fibers ...

Embodiment 2

[0055] Weigh 0.3 g of analytically pure lead nitrate, add it into 100 mL of deionized water, and stir until completely dissolved to obtain a lead nitrate solution. Weigh 20 g of analytically pure disodium ethylenediaminetetraacetic acid (EDTA), add it into 300 mL of deionized water, stir well until it is completely dissolved, and obtain an EDTA solution. Add the prepared lead nitrate solution into the EDTA solution and stir for 30 minutes to make the lead ions fully complexed by EDTA. Then, 7.8 g of graphene oxide dispersion liquid with a concentration of 3.5 wt % was added to the above solution, stirred while heating, and water was removed to obtain composite additive precursor powder. Put the obtained additive precursor powder in N 2 Calcined at 800° C. for 5 h in a protective atmosphere to obtain a graphene-based composite additive. 100g of lead powder, 2.0g of graphene-based composite additives, 1.4g of barium sulfate, and 0.05g of short polypropylene fibers with a lengt...

Embodiment 3

[0057] Weigh 0.3 g of analytically pure lead nitrate, add it into 100 mL of deionized water, and stir until completely dissolved to obtain a lead nitrate solution. Weigh 20 g of analytically pure disodium ethylenediaminetetraacetic acid (EDTA), add it into 300 mL of deionized water, stir well until it is completely dissolved, and obtain an EDTA solution. Add the prepared lead nitrate solution into the EDTA solution and stir for 30 minutes to make the lead ions fully complexed by EDTA. Then, 3.9 g of graphene oxide dispersion liquid with a concentration of 3.5 wt % was added to the above solution, stirred while heating, and water was removed to obtain composite additive precursor powder. Put the obtained additive precursor powder in N 2 Calcined at 800° C. for 5 h in a protective atmosphere to obtain a graphene-based composite additive. 100g of lead powder, 1.5g of graphene-based composite additives, 1.4g of barium sulfate, and 0.05g of short polypropylene fibers with a lengt...

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Abstract

The invention relates to a lead-carbon battery composite negative electrode additive and a preparation method thereof, wherein the lead-carbon battery composite negative electrode additive is formed by coating the surface of a reduced graphene oxide lamella with a metal element modified porous carbon material, and contains 0.1-50 wt% of reduced graphene oxide, 40-90 wt% of porous carbon, and 0.1-10 wt% of a metal element. According to the present invention, the lead-carbon battery composite negative electrode additive has high specific surface area and high electronic conductivity; and by doping the lead-carbon battery composite negative electrode additive into a lead-acid battery negative electrode, the lead-carbon battery negative electrode with characteristics of high activity, high charge-discharge reversibility and low hydrogen evolution can be obtained.

Description

technical field [0001] The invention belongs to the technical field of lead-carbon batteries and lead-acid batteries, and in particular relates to a graphene-based composite additive and a preparation method thereof, as well as the application of the modified composite additive in a negative electrode of a lead-carbon battery. Background technique [0002] Lead-carbon battery is a new type of energy storage device that combines supercapacitors and lead-acid batteries. The lead-acid battery is used as the energy source, and the supercapacitor is used as the pulse power, which improves the performance of the battery, thus making up for the deficiency that ordinary valve-regulated lead-acid batteries cannot cope with various complex use conditions. In lead-carbon batteries, the two energy storage methods of supercapacitor and lead-acid battery are integrated in an internal combination, and no special external electronic control circuit is required, so that the size of the batte...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/14H01M4/20
CPCH01M4/14H01M4/20H01M4/62H01M4/625H01M4/628Y02E60/10
Inventor 阎景旺席耀宁张华民李先锋张洪章孙海涛霍玉龙王再红高鹤
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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