Preparation method of carbon-based composite material for cathode of lead-carbon battery

A technology of carbon-based composite materials and lead-carbon batteries, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of material limitation, reduce the problem of hydrogen evolution, and serious carbon materials, and achieve uniform surface distribution, uniform size, and utilization rate-enhancing effect

Inactive Publication Date: 2018-01-12
吉林省凯禹电化学储能技术发展有限公司
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  • Description
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  • Application Information

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Problems solved by technology

As an integral part of energy storage and output conversion, secondary batteries have been further developed, but they are also facing higher challenges
[0006] There are many patents on the improvement of lead-acid negative electrodes. Among them, in patent CN 102074702 B, carbon materials, carbon black, adhesives and other substances are mixed and loaded on the conductive motherboard, and lead is deposited on the carbon materials by electrodeposition. particles, and then scrape the material from the mother board; however, this method is cumbersome to operate, and it is easy to damage the surface structure. At the same time, the amount of prepared material is limited by the initial load, and it is not easy to mass-produce
Patent CN201310077914, by spray drying the conductive carbon material and lead-containing solution, and then drying the composite material, this method forms a lead oxide shell on the surface of the carbon material, which reduces the hydrogen evolution problem of the carbon material to a certain extent, but In the preparation process of this method, the lead oxide on the surface is formed by combining the surface of the carbon material with lead ions and drying, and its distribution is related to the carbon surface and is not uniform.
In addition, the patent CN201210493085 prepared carbon materials by wet ball milling and surface modification, and prepared composite materials by vacuum lead plating, which improved the adhesion between the lead content on the surface and the active material, but the prepared by this method The material loses the structural properties of the original carbon material and is more cumbersome
However, CN201210070245 and CN201210070245 prepared carbon material-coated lead composite materials by mixing carbon source and lead powder through hydrothermal and microwave methods, which improved the mechanical strength of the pole plate, but the exposure of carbon material would cause more serious hydrogen evolution problems

Method used

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  • Preparation method of carbon-based composite material for cathode of lead-carbon battery
  • Preparation method of carbon-based composite material for cathode of lead-carbon battery
  • Preparation method of carbon-based composite material for cathode of lead-carbon battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Add 10.0g of rice husk-based capacitor carbon material and 860ml of 0.1mol L into the beaker -1 lead nitrate solution, after stirring for 20min to mix uniformly, obtain a uniformly dispersed mixed solution;

[0031] (2) Slowly add 0.05mol L dropwise to the mixed solution described in (1) -1 Sodium hydroxide solution to completely precipitate lead on the surface of the carbon material, filter under reduced pressure, wash with absolute ethanol and deionized water three times, and dry in a blast drying oven at 60°C for 8 hours to obtain the precursor material;

[0032] (3) Put the precursor material described in (2) in a 380°C tube furnace N 2 Treat under protection for 5 hours to obtain the final black composite material.

[0033] (4) Use the composite material obtained in the above (3) as an additive to prepare the negative electrode of the battery and combine it with PbO 2 The battery is assembled with the positive plate, using AGM separator as the diaphragm, and...

Embodiment 2

[0036] (1) Add 10g of rice husk-based capacitor carbon material and 860ml of 0.025mol L into the beaker -1 lead nitrate solution, after stirring for 30min to mix uniformly, obtain a uniformly dispersed mixed solution;

[0037] (2) slowly drop 0.025mol L into the mixed solution described in (1) -1 Sodium hydroxide solution, so that the lead-containing compound is deposited on the surface of the carbon material to precipitate completely, filtered under reduced pressure, washed repeatedly with absolute ethanol and deionized water for 3 times, and dried in a blast drying oven at 60°C for 8 hours to obtain the precursor material;

[0038] (3) Treat the precursor material described in (2) in a tube furnace at 380° C. for 5 hours to obtain the final black composite material.

[0039] (4) Use the composite material obtained in the above (3) as an additive to prepare the negative electrode of the battery and combine it with PbO 2The battery is assembled with the positive plate, using...

Embodiment 3

[0042] (1) Add 10g of rice husk-based capacitor carbon material and 860ml of 0.005mol L into the beaker -1 lead nitrate solution, after stirring for 30min to mix uniformly, obtain a uniformly dispersed mixed solution;

[0043] (2) slowly drop 0.001mol L into the mixed solution described in (1) -1 Sodium hydroxide solution, so that the lead-containing compound is deposited on the surface of the carbon material to precipitate completely, filtered under reduced pressure, washed repeatedly with absolute ethanol and deionized water for 3 times, and dried in a blast drying oven at 60°C for 8 hours to obtain the precursor material;

[0044] (3) Treat the precursor material described in (2) in a tube furnace at 380° C. for 5 hours to obtain the final black composite material.

[0045] (4) Use the composite material obtained in the above (3) as an additive to prepare the negative electrode of the battery and combine it with PbO 2 The battery is assembled with the positive plate, usin...

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Abstract

The invention relates to a preparation method of a carbon-based composite material for a cathode of a lead-carbon battery, which can prepare a carbon-based lead compound composite material with a controllable proportion, wherein the lead compound uniformly distributes on the surface of carbon material and maintains the original structure character of the carbon material. The preparation method isas follows: the carbon material and a lead ion solution are uniformly mixed in a reaction vessel, a precipitant is slowly dropped, the lead ions are completely deposited on the surface of the carbon material, then filtered, washed and dried to obtain a precursor, and the composite material is obtained through high temperature treatment, and mass ratio of lead compounds is between 1% to 90%. The composite material and the active substances of cathode of lead-acid battery can be better combined by the lead oxide particles on the surface, while the cathode capacity of the cathode of the battery prepared by using the composite material additive is obviously increased, the hydrogen evolution of the cathode is reduced, cathode active material utilization rate is also greatly improved, and the cycle life of high-rate charge-discharge of partial charge state of the cathode is significantly prolonged.

Description

technical field [0001] The invention relates to a method for preparing a carbon-based lead oxide composite material by chemical deposition, and relates to the field of chemical power sources Background technique. [0002] With the increasing attention to the consumption of fossil fuels and environmental issues, the development of sustainable clean energy has attracted much attention. As an integral part of energy storage and output conversion, secondary batteries have been further developed, but they are also facing higher challenges. Valve-regulated lead-acid battery (VRLA) is an important member of secondary batteries, because of its mature manufacturing process, low production cost and high safety performance, it is one of the important candidates for power batteries and energy storage batteries. However, whether it is a power application or an energy storage application, the battery is often in an undercharged state and is in a partial state of charge (PSoC--Partial Sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/62
CPCY02E60/10
Inventor 林海波林哲琪李洪坤
Owner 吉林省凯禹电化学储能技术发展有限公司
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