Magnesium air battery cathode

An air battery and cathode technology, applied in battery electrodes, circuits, electrical components, etc., to achieve good catalytic performance, high selectivity, and easy purification

Inactive Publication Date: 2013-08-14
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the lag in the development of power batteries, power batteries have become a bottleneck in the development of electric vehicles

Method used

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  • Magnesium air battery cathode
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: Preparation of closely arranged planar polymerized phthalocyanines

[0032] (1) Liquid phase method

[0033] In a 250mL three-neck flask equipped with electric stirring, reflux condenser and thermometer, add 15.2g (0.1mol) urea, 8g (0.04mol) pyromellitic anhydride and 150mL rectified kerosene respectively, heat, and control the temperature at 170- 180°C, during the reaction process, the urea condensed and attached to the spherical condenser should be removed in time, react for 3 hours, stop heating, wait to cool below 140°C, add 0.5g (0.0004mol) ammonium molybdate, 7g ferrous ammonium sulfate (0.018mol ) and 15g (0.1mol) urea, speed up the stirring speed to prevent the reaction product from forming balls, control the temperature at 190-210°C for 4 hours, pour out the kerosene, take out the dark green crude product, use petroleum ether to eliminate the residual kerosene, grind it finely , boiled repeatedly, unreacted urea, metal salts and catalysts were washe...

Embodiment 2

[0040] Catalyst immobilization: Take the catalyst immobilization with a mass ratio of activated carbon and iron complexes of 1:1 as an example.

[0041] Add 0.50g Poly-PcFe and 20mL DMSO to the Erlenmeyer flask respectively, stir and heat to dissolve. Add 0.50g of XC-72 activated carbon, ultrasonically vibrate for 1h, then heat, reflux, and stir for 24h. Take the mixture out and put it into a beaker, place it on a heating mantle to evaporate until it dries quickly, put it in an oven for aging at 75°C, and dry it for later use.

[0042] The immobilization methods and steps of the catalysts with different proportions are the same as above, only the mass proportion of the polymerized phthalocyanine metal complex and activated carbon can be changed to prepare a catalyst with Poly-PcM:C=1.2:1-1:1.2.

[0043] The preparation method of the complexes (Poly-PcM) of different transition metal ions (Co2+, Ni2+, Mn2+, Pt2+, etc.), and the catalyst precursors with different mass ratios of...

Embodiment 3

[0045] Catalyst activation. Take the catalyst with a ratio of 1:1 (Poly-PcFe:C) activated at 600°C as an example.

[0046] Weigh 0.2500g of the immobilized catalyst, spread it evenly in the porcelain boat, place the porcelain boat in the quartz tube in the tubular resistance furnace, assemble and connect the experimental equipment, and confirm that the pipeline of the instrument is closed. Introduce high-purity Ar gas for 30 minutes, remove the air in the tube, continue to infuse Ar, and raise the temperature according to the set program. After the temperature rises to 600 ° C, keep the constant temperature for 2 hours, and then cool down. The whole process is continuously protected by argon to prevent the catalyst from being oxidized and decomposed at high temperature.

[0047] Catalysts with activation temperatures of 500° C. to 1100° C. can be obtained according to the above method, but the temperature of the heat preservation is different. Optional insulation 500°C, 700°...

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Abstract

The invention provides a magnesium air battery cathode. The novel magnesium air battery cathode comprises a porous current collector treated with anticorrosion treatment; a surface of the porous current collector is a catalyst layer, and the other surface of the porous current collector is a porous hydrophobic layer, which is prepared from a ventilating waterproof material. The porous hydrophobic layer is prepared by hot pressing of a porous material or by preparing apertures on a hydrophobic material through a phase transfer method or a template method; the catalyst layer is prepared by coating a paste made from a mixture of catalyst, solvent, dispersant and binder on the current collector and curing; the catalyst is formed by immobilization and activation of a catalyst precursor, and the catalyst precursor is characterized by being a closely arranged plane polymerization phthalocyanine complex shown as below. Employing the cathode, the magnesium air battery has better performances.

Description

technical field [0001] The invention belongs to the field of metal-air fuel cells and fuel cells, and in particular relates to a magnesium-air cell cathode. Background technique [0002] Electric vehicles are valued by people for their cleanliness and environmental protection. However, due to the lag in the development of power batteries, power batteries have become a bottleneck in the development of electric vehicles. In recent years, research on metal-air batteries as automotive batteries has received attention [Mao Zongqiang et al., Power Technology, 1996, 20(6): 252-266]. In addition, in the event of a disaster in a local area, once the power is interrupted, a high-power emergency power supply is required. Therefore, the development and research of high-power magnesium-air batteries can not only drive the development of the battery industry, but also drive the development of electric vehicles, electronic products and other industries. Civil, etc., national strategic n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/90
CPCY02E60/50
Inventor 李忠芳王素文
Owner SHANDONG UNIV OF TECH
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