Method for improving electrochemical corrosion resistance of conductive carbon black

A technology of conductive carbon black and corrosion performance, which is applied in the direction of battery electrodes, circuits, electrical components, etc., and can solve the problems of high cost and high energy consumption

Inactive Publication Date: 2021-04-20
安徽枡水新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the technical problems existing in the prior art. The present invention provides a method for improving the electrochemical corrosion resistance of conductive carbon black. The purpose is to solve the most commonly used problem of improving the electrochemical corrosion resistance of conductive carbon black. The method is high-temperature annealing (>1500°C), which consumes a lot of energy and costs, and needs to be carried out under the protection of an inert gas.

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  • Method for improving electrochemical corrosion resistance of conductive carbon black
  • Method for improving electrochemical corrosion resistance of conductive carbon black
  • Method for improving electrochemical corrosion resistance of conductive carbon black

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] First, mix 50㎎ conductive carbon black with 20mL ethanol, stir for 10min to disperse the conductive carbon black evenly in the ethanol;

[0023] Subsequently, the ethanol solution of conductive carbon black was irradiated by a non-focused pulsed laser, and the solution was still stirred during the irradiation process. The wavelength of the pulsed laser is 1064nm, the spot diameter is 7mm, the pulse width is 7ns, the frequency is 10Hz, and the energy density is 400mJ / cm 2 , the irradiation time is 15min.

[0024] figure 1 Shown are the corrosion current versus time curves of initial conductive carbon black and laser-irradiated conductive carbon black. At a potential of 1.2V (vs. NHE), no water decomposition reaction will occur, and the reaction that occurs at this time is mainly a carbon corrosion reaction. Therefore, the corrosion current at this potential can be used to measure the electrochemical corrosion resistance of conductive carbon black ability. Depend on ...

Embodiment 2

[0026] First, mix 35㎎ conductive carbon black with 20mL ethanol, stir for 10min to make conductive carbon black evenly dispersed in ethanol;

[0027] Subsequently, the ethanol solution of conductive carbon black was irradiated by a non-focused pulsed laser, and the solution was still stirred during the irradiation process. The wavelength of the pulsed laser is 1064nm, the spot diameter is 7mm, the pulse width is 7ns, the frequency is 10Hz, and the energy density is 300mJ / cm 2 , the irradiation time is 10min.

[0028] figure 2 Shown are the corrosion current versus time curves of initial conductive carbon black and laser-irradiated conductive carbon black. Depend on figure 2 It can be seen that during the whole test process, compared with the initial conductive carbon black, the laser irradiated conductive carbon black has a lower corrosion current; after 3600s, the corrosion current of the initial conductive carbon black is 0.424μA, while the laser irradiated conductive c...

Embodiment 3

[0030] First, mix 150㎎ conductive carbon black with 20mL ethanol, stir for 10min to disperse conductive carbon black evenly in ethanol;

[0031] Subsequently, the ethanol solution of conductive carbon black was irradiated by a non-focused pulsed laser, and the solution was still stirred during the irradiation process. The wavelength of the pulsed laser is 1064nm, the spot diameter is 7mm, the pulse width is 7ns, the frequency is 20Hz, and the energy density is 800mJ / cm 2 , the irradiation time is 20min.

[0032] image 3 Shown are the corrosion current versus time curves of initial conductive carbon black and laser-irradiated conductive carbon black. Depend on image 3 It can be seen that during the whole test process, compared with the initial conductive carbon black, the laser irradiated conductive carbon black has a lower corrosion current; after 3600s, the corrosion current of the initial conductive carbon black is 0.424μA, while the laser irradiated conductive carbon b...

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Abstract

The invention discloses a method for improving electrochemical corrosion resistance of conductive carbon black, which comprises the following two steps: step 1, mixing the conductive carbon black with an alcohol solvent, and stirring for a period of time to enable the conductive carbon black to be uniformly dispersed in the alcohol solvent; and 2, irradiating the conductive carbon black alcoholic solution by using non-focused pulse laser, and stirring the solution in the irradiation process. Compared with initial conductive carbon black, the conductive carbon black subjected to laser irradiation treatment has lower corrosion current under the condition of high potential and shows higher electrochemical corrosion resistance, and the method is simple, quick, efficient and easy for batch production, has a wide application prospect in the field of proton exchange membrane fuel cell catalysts, and further has a wide application prospect in the field of proton exchange membrane fuel cell catalysts. The application field of the liquid-phase laser irradiation technology is expanded, and meanwhile, a new design thought is provided for improving the electrochemical corrosion resistance of the conductive carbon black.

Description

technical field [0001] The invention belongs to the field of proton exchange membrane fuel cell catalysts, and in particular relates to a method for improving the electrochemical corrosion resistance of conductive carbon black. Background technique [0002] Proton exchange membrane fuel cells can directly convert the chemical energy of molecules such as methanol and hydrogen into electrical energy, and have the advantages of high energy conversion efficiency and environmental friendliness. The electrocatalytic stability of the electrode catalyst directly affects the service life of the proton exchange membrane fuel cell, and the corrosion of the carbon support during the operation of the battery is one of the main reasons for the degradation of the catalytic activity of the catalyst. Currently, the most commonly used catalyst carrier is Vulcan XC-72R conductive carbon black. In the harsh working environment of proton exchange membrane fuel cells, this conductive carbon blac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/48C09C1/56C09C3/04H01M4/92
CPCY02E60/50
Inventor 王新磊林晨张东余子涵王凤霞
Owner 安徽枡水新能源科技有限公司
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