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Bimetallic-activity monatomic catalyst for metal-air battery and preparation method thereof and metal-air battery

A metal-air battery and bimetallic technology, which is applied in the direction of fuel cell half-cells and primary battery-type half-cells, battery electrodes, chemical instruments and methods, etc., can solve the problems of low activity, achieve good catalytic activity, improve Cycle life, effect of reducing activation energy of reaction

Active Publication Date: 2020-01-07
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a method for preparing a bimetallic active single-atom catalyst for a metal-air battery to solve the problem of low activity of a transition metal single-atom catalyst in the OER reaction in the prior art

Method used

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  • Bimetallic-activity monatomic catalyst for metal-air battery and preparation method thereof and metal-air battery
  • Bimetallic-activity monatomic catalyst for metal-air battery and preparation method thereof and metal-air battery
  • Bimetallic-activity monatomic catalyst for metal-air battery and preparation method thereof and metal-air battery

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Embodiment 1

[0045] The preparation method of the bimetallic active single-atom catalyst for the metal-air battery of the present embodiment comprises the following steps:

[0046] 1) 0.87g nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 (2) and 1.32g of sodium citrate were added into 100mL of ultrapure water, ultrasonically dispersed for 10min, and dissolved completely to obtain solution A;

[0047] 0.66g potassium cobalt cyanide (K 3 [Co(CN) 6 ]) was added into 100mL ultrapure water, ultrasonically dispersed for 10min, and dissolved completely to obtain solution B;

[0048] Mix solution A and solution B, stir magnetically for 10 min, then let stand at room temperature for 24 h, centrifuge, wash the solid three times with ultrapure water and ethanol, and dry in a vacuum oven at 60°C overnight to obtain metal Organic framework compounds (CoNi-MOFs).

[0049] 2) Add 100 mg of metal-organic frameworks (CoNi-MOFs) prepared in step 1) and 50 mg of dopamine hydrochloride to 75 mg of a tris ...

Embodiment 2

[0053] The preparation method of the bimetallic active single-atom catalyst for the metal-air battery of the present embodiment comprises the following steps:

[0054] 1) 0.58g nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 (2) and 0.89g of sodium citrate were added to 80mL of ultrapure water, ultrasonically dispersed for 15min, and dissolved completely to obtain solution A;

[0055] 0.5g potassium cobaltcyanide (K 3 [Co(CN) 6 ]) Add 50mL ultrapure water, ultrasonically disperse for 10min, make it dissolve completely to obtain solution B;

[0056] Mix solution A and solution B, stir magnetically for 15 minutes, then stand at room temperature for 20 hours, centrifuge, wash the solid three times with ultrapure water and ethanol, and dry in a vacuum oven at 50°C overnight to obtain metal Organic framework compounds (CoNi-MOFs).

[0057] 2) Add 90 mg of metal-organic frameworks (CoNi-MOFs) prepared in step 1) and 60 mg of dopamine hydrochloride to 100 mg of a tris buffer solu...

Embodiment 3

[0061] The preparation method of the bimetallic active single-atom catalyst for the metal-air battery of the present embodiment comprises the following steps:

[0062] 1) 1.17g nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 (2) and 1.75g ​​of sodium citrate were added into 105mL of ultrapure water, ultrasonically dispersed for 15min, and dissolved completely to obtain solution A;

[0063] 0.88g potassium cobalt cyanide (K 3 [Co(CN) 6 ]) Add 80mL ultrapure water, ultrasonically disperse for 15min, make it dissolve completely to obtain solution B;

[0064] Mix solution A and solution B, stir magnetically for 20 minutes, then stand at room temperature for 20 hours, centrifuge, wash the solid three times with ultrapure water and ethanol, and dry in a vacuum oven at 55°C overnight to obtain metal Organic framework compounds (CoNi-MOFs).

[0065] 2) Add 105 mg of the metal-organic frameworks (CoNi-MOFs) prepared in step 1) and 45 mg of dopamine hydrochloride to 85 mg of a tris ...

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Abstract

The invention relates to a bimetallic-activity monatomic catalyst for a metal-air battery and a preparation method thereof and the metal-air battery, and belongs to the technical field of metal-air batteries. The preparation method of the bimetallic-activity monatomic catalyst for the metal-air battery comprises the following steps: 1) adding a cobalt-nickel bimetallic organic framework compound and dopamine hydrochloride or dopamine into an alkaline solution, stirring for 5-8 hours, and carrying out solid-liquid separation to obtain an MOF / PDA nano cubic block, wherein the alkaline solution is a tris buffer solution; and 2) carrying out annealing processing on the MOF / PDA nano cubic block prepared in the step 1) in an ammonia atmosphere to obtain the required product. The metal-air battery prepared from the catalyst prepared by the preparation method of the bimetallic-activity monatomic catalyst for the metal-air battery has better charge-discharge efficiency and longer cycle life than similar batteries.

Description

technical field [0001] The invention relates to a bimetallic active single-atom catalyst for a metal-air battery, a preparation method thereof, and a metal-air battery, belonging to the technical field of metal-air batteries. Background technique [0002] At present, with the development of the new energy industry, various energy storage devices have also brought good development opportunities, such as lithium batteries, which are more and more widely used in various fields. However, as the performance requirements of energy storage devices in some fields are getting higher and higher, it is difficult for many energy storage devices to meet the new requirements. For example, lithium batteries are increasingly It is increasingly showing the limitations of development, and finding new high-performance and low-cost batteries has become an urgent problem to be solved at present. Metal-air batteries have become one of the most promising new energy storage devices due to their sm...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M4/96H01M4/88H01M12/06B01J27/24B82Y30/00B82Y40/00
CPCH01M4/9041H01M4/9083H01M4/90H01M4/96H01M4/88H01M12/06B01J27/24B82Y30/00B82Y40/00B01J35/33Y02E60/50
Inventor 彭生杰于得双李林林
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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