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Bifunctional catalyst, preparation method thereof and metal-air battery

A bifunctional catalyst and metal material technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of high cost, high noble metal content, poor catalytic cycle stability, etc., and achieve simple methods, reduce the use of precious metals, and adapt Effects on large-scale production and promotion

Active Publication Date: 2021-12-10
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the currently commonly used noble metal-containing catalysts have high noble metal content, are relatively expensive, and have poor catalytic cycle stability, which has become an urgent problem to be solved in scientific research.

Method used

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  • Bifunctional catalyst, preparation method thereof and metal-air battery
  • Bifunctional catalyst, preparation method thereof and metal-air battery
  • Bifunctional catalyst, preparation method thereof and metal-air battery

Examples

Experimental program
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Embodiment 1

[0029] refer to figure 1 , the first embodiment of the present invention provides a method for preparing a bifunctional catalyst, comprising the following steps:

[0030] S1: Melting a variety of metal materials in proportion to obtain a homogeneous alloy body, the various metal materials include aluminum, cobalt, iron, X1, X2, wherein the X1 is selected from any two of chromium, nickel, and molybdenum Or three, the X2 is selected from one or more of platinum, palladium, gold, silver, copper; preferably, the atomic number ratio of the aluminum, cobalt, iron, X1, X2 is

[0031] 95.8~95.9:1:1:2:0.1~0.2; optimally, the X1 is chromium and molybdenum;

[0032] S2: rapidly cooling the alloy body;

[0033] S3: placing the rapidly cooled alloy body in an alkaline solution for dealloying treatment to obtain the bifunctional catalyst.

[0034] In this embodiment, in step S1, the various metal materials to be smelted are aluminum, cobalt, iron, molybdenum, chromium, and platinum metal...

Embodiment 2

[0051] This embodiment is substantially similar to Embodiment 1, and the similarities will not be repeated here. The main difference between the two lies in that the types and proportions of the various metal materials to be smelted are different. In this embodiment, the various metal materials for smelting are aluminum, cobalt, iron, molybdenum, chromium, platinum with an atomic number ratio of 95.8:1:1:1:1:0.04:0.04:0.04:0.04:0.04 , palladium, gold, silver, copper metal particles.

Embodiment 3

[0053] This embodiment is substantially similar to Embodiment 1, and the similarities will not be repeated here. The main difference between the two lies in that the types and proportions of the various metal materials to be smelted are different. In this embodiment, the various metal materials to be smelted are aluminum, cobalt, iron, nickel, chromium, and platinum metal particles with an atomic number ratio of 95.9:1:1:1:1:0.1.

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Abstract

The invention belongs to the technical field of material preparation, and discloses a bifunctional catalyst, a preparation method thereof and a metal-air battery. The preparation method of the bifunctional catalyst comprises the steps that: S1, multiple metal materials are smelted in proportion to obtain an alloy body, wherein the multiple metal materials comprise aluminum, cobalt, iron, X1 and X2, wherein X1 is selected from any two or three of chromium, nickel and molybdenum, and X2 is selected from one or more of platinum, palladium, gold, silver and copper; S2, the alloy body is rapidly cooled; and S3, the rapidly cooled alloy body is placed in an alkaline solution to be subjected to dealloying treatment, and the bifunctional catalyst is obtained.

Description

technical field [0001] The invention relates to the technical field of material preparation, in particular to a bifunctional catalyst, a preparation method thereof, and a metal-air battery containing the bifunctional catalyst. Background technique [0002] Metal-air batteries have been widely studied and applied due to their high specific energy and stable performance. Designing and fabricating bifunctional electrocatalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is crucial to realize high-performance rechargeable metal-air batteries. Noble metals are often used as bifunctional electrocatalysts for metal-air batteries due to their good catalytic properties, for example, Pt- and Ir(Ru)-based materials are currently the most efficient catalysts for oxygen reduction reaction and oxygen evolution reaction, respectively. However, the currently commonly used noble metal-containing catalysts have high noble metal content, are relatively expensive, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90
CPCH01M4/9041Y02E60/50
Inventor 邱华军金泽宇林熹陈祖煌胡凯龙谢国强刘兴军
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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