A method for chemically doping Pb on the surface of negative electrode carbon material for super battery

A surface chemistry, super lead-acid battery technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of limited hydrogen suppression effect, Pb powder doping, doping depth, poor uniformity, etc. Doping, reducing hydrogen evolution, the effect of simple method

Active Publication Date: 2015-11-18
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since AC is a high specific surface material, its pores are in the micron or even nanometer scale, and simple physical mixing cannot make Pb powder doped into these pore structures, so the doping depth and uniformity are poor, and the hydrogen suppression effect that can be produced is limited.

Method used

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  • A method for chemically doping Pb on the surface of negative electrode carbon material for super battery

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Activated carbon was vulcanized at a constant temperature for 2 hours in a S vapor atmosphere (two-stage furnace was used for vulcanization, wherein the temperature of the sulfur evaporation zone was 200 °C, and the temperature of the AC vulcanization zone was 400 °C), and then the S2AC was placed in 0.1mol / LPb (NO 3 ) 2 The solution was ultrasonically oscillated for 10 min, filtered and dried to obtain a doped and modified AC-S-Pb sample.

[0029] The modified activated carbon, binder, and conductive agent are adjusted into a slurry in a certain proportion, and evenly coated on the Ti plate current collector (the coating amount of the AC electrode is 0.0080g cm -2 , The coating amount of the modified electrode is 0.0085g. cm -2 ), packaged into a 1cm 2 The activated carbon electrode is used for the hydrogen evolution (linear polarization curve) test on the 2273 electrochemical workstation using a three-electrode system, and the test solution is 5mol / LH 2 SO 4 .

...

Embodiment 2

[0032] Activated carbon in O 2 Constant temperature oxidation in the atmosphere for 6h, the oxidation temperature is 600°C, and then the oxidation AC is placed in 0.1mol / LPb(NO 3 ) 2 The solution was ultrasonically oscillated for 1h, filtered and dried, and then placed in 0.1mol / LH 3 PO 4 Vacuum impregnated in the solution for 24h, filtered and dried to obtain the doped modified AC-O-Pb sample.

[0033] The modified activated carbon, binder, and conductive agent are adjusted into a slurry in a certain proportion, and evenly coated on the Ti plate current collector (the coating amount of the AC electrode is 0.0080g cm -2 , The coating amount of the modified electrode is 0.0083g. cm -2 ), packaged into a 1cm 2 The activated carbon electrode is used for the hydrogen evolution (linear polarization curve) test on the 2273 electrochemical workstation using a three-electrode system, and the test solution is 5mol / LH 2 SO 4 .

[0034] At -0.9V, the hydrogen evolution current p...

Embodiment 3

[0036] activated carbon in SO 2 Constant temperature vulcanization in the atmosphere for 24h, the vulcanization temperature is 200 ℃, and then put SiAC in 0.1mol / LPb(CH 3 COO) 2 The solution was ultrasonically oscillated for 1h, filtered and dried, and then placed in 0.1mol / LH 2 SO 4 Vacuum impregnated in the solution for 24h, filtered and dried to obtain the doped modified AC-S-Pb sample.

[0037] The modified activated carbon, binder, and conductive agent are adjusted into a slurry in a certain proportion, and evenly coated on the Ti plate current collector (the coating amount of the AC electrode is 0.0080g cm -2 , The coating amount of the modified electrode is 0.0082g. cm -2 ), packaged into a 1cm 2 The activated carbon electrode is used for the hydrogen evolution (linear polarization curve) test on the 2273 electrochemical workstation using a three-electrode system, and the test solution is 5mol / LH 2 SO 4 .

[0038] At -0.9V, the hydrogen evolution current per un...

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Abstract

The invention provides a method for chemical doping of plumbum (Pb) on the surface of a cathode carbon material used for an ultrabattery. The method comprises two steps of carbon material surface modification and Pb doping. The carbon material surface modification includes that carbon material undergoes a vulcanization reaction and / or an oxidation reaction. The Pb doping includes that the carbon material is placed into a solution containing Pb <2+> to be treated, and a treating mode is at least one chosen from vacuum soaking, ultrasound oscillation and high-temperature backflow. The method is simple and convenient to operate, achieves deep, uniform and mass doping of Pb elements in a microcosmic area of the carbon material by means of strong affinity of S and O to Pb and C, restrains hydrogen evolution of the carbon material under an acid-stage system, improves the volume of the carbon material, and enables the level of the hydrogen evolution of the surface of the carbon material under the acid-stage system corresponds to be equal to that of the surface of Pb. The method is suitable for industrialization application.

Description

technical field [0001] The invention relates to a preparation technology of electrode materials for super lead-acid batteries, in particular to a method for chemically doping Pb on the surface of negative electrode carbon materials for super batteries; it belongs to the technical field of electrochemical energy storage devices. Background technique [0002] Power battery is one of the key technologies of new energy vehicles, and is favored by the majority of automobile and auto parts companies and investors. At present, power batteries mainly include lead-acid batteries, Cd-Ni batteries, MH-Ni batteries, liquid lithium-ion batteries, polymer lithium-ion batteries, proton exchange membrane fuel cells (PEMFC), and direct methanol fuel cells (DMFC). There are on-board experiments. As the battery with the longest application history, lead-acid batteries are widely used as power sources for electronic equipment in traditional cars. In the field of new energy vehicles, they are n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36
CPCY02E60/10
Inventor 蒋良兴洪波赖延清薛海涛于枭影李劼刘业翔
Owner CENT SOUTH UNIV
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