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Spherical metal phthalocyanine (air battery oxygen cathode bifunctional catalyst) and preparation method thereof

A bifunctional catalyst and air battery technology, which is applied to battery electrodes, fuel cell half-cells, primary battery-type half-cells, circuits, etc., can solve the problems of slow oxygen cathode kinetics and achieve improved electrocatalytic performance, Optimize the design and optimize the overall performance of the battery to improve the effect

Active Publication Date: 2018-08-28
XIAN TECHNOLOGICAL UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a spherical metal phthalocyanine as an air battery oxygen cathode bifunctional catalyst and its preparation method, to improve the slow kinetics of the oxygen cathode in the existing air battery application, and to enrich the types of oxygen electrode catalysts

Method used

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  • Spherical metal phthalocyanine (air battery oxygen cathode bifunctional catalyst) and preparation method thereof
  • Spherical metal phthalocyanine (air battery oxygen cathode bifunctional catalyst) and preparation method thereof
  • Spherical metal phthalocyanine (air battery oxygen cathode bifunctional catalyst) and preparation method thereof

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preparation example Construction

[0037] The invention relates to a method for preparing a spherical metal phthalocyanine as an oxygen cathode bifunctional catalyst for an air battery, which is realized by the following steps:

[0038] Step 1: 4,4-bis(4-hydroxyphenyl)pentanoic acid, methanol, and concentrated sulfuric acid were reacted at a temperature of 70°C to obtain milky white crystal A;

[0039] Step 2: Purify the milky white crystal A and add DMF to stir, then add 4-nitrophthalonitrile and anhydrous potassium carbonate, react at a temperature of 50°C, filter and dry to obtain the reaction product B;

[0040] Step 3: Dissolving the reaction product B in DMF, adding sodium hydroxide solution, and stirring to obtain the reaction product C;

[0041] Step 4: react the transition metal salt, reaction product C, and dimethylaminoethanol at a temperature of 250° C. for a reaction time of 4 hours to form a reactant D;

[0042] Step 5: Add hydroxyl multi-walled carbon nanotubes and anhydrous DMF into the reactio...

Embodiment

[0055] Step 1: Weigh 5.726g (0.02mol) of 4,4-bis(4-hydroxyphenyl)pentanoic acid, 100mL of methanol, and 0.01mL (0.0002mol) of concentrated sulfuric acid, so that 4,4-bis(4-hydroxyphenyl) The molar ratio of valeric acid to concentrated sulfuric acid is 100:1) in a 250mL round-bottomed flask, heated to reflux at 70°C for 6h, cooled to room temperature after the reaction, and deionized water was added to the reaction vessel, a large amount of white precipitate appeared, filtered to obtain The crude product of substance A was then refluxed three times with methanol and dried in the air to obtain milky white crystal A. The reaction formula is as follows:

[0056]

[0057]Step 2: Weigh 30mL of N,N-dimethylformamide (DMF) into a 250ml beaker with a graduated cylinder and add 2.745g (8.25mmol) of substance A, followed by 2.768g (16mmol) of 4-nitrophthalonitrile , the molar ratio of 4-nitrophthalonitrile to substance A is 2:1 (slightly excessive substance A), under nitrogen protecti...

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Abstract

The invention relates to spherical metal phthalocyanine (an air battery oxygen cathode bifunctional catalyst) and a preparation method thereof. The preparation method comprises the following steps: reacting 4,4-bis(4-hydroxyphenyl)pentanoate, methanol and concentrated sulfuric acid to obtain A; adding DMF after purification and stirring, then adding 4-nitrophthalonitrile and anhydrous potassium carbonate for reaction, and filtering and drying to obtain B; dissolving in DMF, and adding a sodium hydroxide solution to form C; reacting transition metal salt, C and dimethylaminoethanol to form D; adding hydroxyl multi-walled carbon nanotubes and anhydrous DMF to a reaction vessel, adding D and stirring, and dropwise adding triethylamine, and performing suction filtration and drying to obtain the final product, a spherical metal phthalocyanine catalyst. The metal phthalocyanine is synthesized for the first time, and a catalytic oxygen cathode reaction mechanism can learn from the function ofoxygen transportation of iron porphyrin in heme, so as to effectively improve electrocatalytic performance and promote an oxygen cathode reaction.

Description

technical field [0001] The invention relates to the technical field of new energy batteries, in particular to a spherical metal phthalocyanine as an air battery oxygen cathode dual-function catalyst and a preparation method thereof. Background technique [0002] Energy is one of the important material foundations related to national development, and it is also the focus of current international competition. As a research hotspot of new energy, new energy battery has its unique advantages in energy development. In the field of electric vehicle technology, air batteries have become one of the most potential energy storage and conversion devices due to their high energy density, safety, reliability, and environmental friendliness. The slow kinetics of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) at the cathode of an air battery severely restrict the commercialization of the battery. At the same time, platinum-based catalysts that have been considere...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M12/06
CPCH01M4/9008H01M12/06
Inventor 张改刘布雷田敏陈卫星
Owner XIAN TECHNOLOGICAL UNIV
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