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Metal-air battery positive electrode and metal-air battery

A metal-air battery and positive electrode technology, applied in battery electrodes, fuel cell half-cells and primary battery-type half-cells, fuel cell-type half-cells and secondary battery-type half-cells, etc., can solve redox Reduced reaction rate, reduced energy conversion efficiency and power density of metal-air batteries, reduced oxygen and metal ion transport capacity, etc.

Active Publication Date: 2017-01-11
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the generation of insoluble metal oxides on the positive electrode during the discharge process, these metal oxides continue to accumulate in the pores of the conductive carbon material, resulting in a decrease in the transport capacity of oxygen and metal ions in the positive electrode, thereby reducing the redox reaction rate and causing metal air. The energy conversion efficiency and power density of the battery are reduced

Method used

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  • Metal-air battery positive electrode and metal-air battery
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  • Metal-air battery positive electrode and metal-air battery

Examples

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preparation example Construction

[0035] The preparation method of the positive electrode 10 of the metal-air battery may be: pulling the carbon nanotube film 122 from the carbon nanotube array; loading catalyst particles 14 on the surface of the carbon nanotube film 122 to form a catalyst composite carbon nanotube film; and A plurality of catalyst-composite carbon nanotube films are stacked on each other to form the positive electrode 10 of the metal-air battery. When the positive electrode 10 of the metal-air battery has a positive current collector 16 , the stacking of multiple catalyst-composite carbon nanotube films refers to stacking the catalyst-composite carbon nanotube films on the surface of the positive current collector 16 .

[0036] The method for loading catalyst particles on the surface of the carbon nanotube film may be chemical vapor deposition or physical vapor deposition, such as vacuum evaporation or magnetron sputtering. When the catalyst particles are loaded, the mass percentage of the ca...

Embodiment 1

[0043] Carbon nanotube films were obtained by pulling from carbon nanotube arrays. Ru metal particles were formed on the surface of the carbon nanotube film by magnetron sputtering. see Figure 7 , the particle size of Ru particles is about 3nm~5nm, uniformly and dispersedly attached to the tube wall of the carbon nanotube. Laminate 100 layers of carbon nanotube films with Ru metal particles on the surface of the carbon nanotube paper to form the positive electrode of the lithium-air battery. The 100 layers of carbon nanotube films are respectively stacked along directions perpendicular to each other, so that the extending directions of carbon nanotubes in the carbon nanotube network structure are perpendicular to each other. The carbon nanotube paper is obtained by laminating 500 layers of carbon nanotube films, and the thickness of the carbon nanotube paper is about 40 microns. The negative electrode is lithium metal. The electrolyte is 0.1mol / L LiTFSI dissolved in TEGDM...

Embodiment 2

[0045] Carbon nanotube films were obtained by pulling from carbon nanotube arrays. Pd metal particles are formed on the surface of the carbon nanotube film by magnetron sputtering. see Figure 10 , the particle size of Pd particles is about 5nm~10nm, uniformly and dispersedly attached to the tube wall of the carbon nanotube. Laminate 100 layers of carbon nanotube films with Pd metal particles on the surface of the carbon nanotube paper to form the positive electrode of the lithium-air battery. The 100 layers of carbon nanotube films are respectively stacked along directions perpendicular to each other, so that the extending directions of carbon nanotubes in the carbon nanotube network structure are perpendicular to each other. The carbon nanotube paper is obtained by laminating 500 layers of carbon nanotube films, and the thickness of the carbon nanotube paper is about 40 microns. The negative electrode is lithium metal. The electrolyte is 0.1mol / L LiTFSI dissolved in TEGD...

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Abstract

The invention relates to a metal-air battery positive electrode. The electrode comprises a carbon nanotube network structure and catalyst particles arranged in the carbon nanotube network structure, the carbon nanotube network structure comprises a plurality of mutually stacked carbon nanotube films, and every carbon nanotube film comprises a plurality of carbon nanotubes basically paralleling to the surface of the carbon nanotube film and basically extending along a same direction. The invention also relates to a metal-air battery.

Description

technical field [0001] The invention relates to a metal-air battery, in particular to a positive electrode of the metal-air battery containing carbon nanotubes and a metal-air battery. Background technique [0002] Metal-air battery is a battery that uses oxygen as the positive electrode active material. It has the advantages of high energy density, easy miniaturization and light weight, etc., and has gradually attracted widespread attention in recent years. According to the different anode metals, metal-air batteries include lithium-air batteries, magnesium-air batteries, zinc-air batteries, and aluminum-air batteries. [0003] The working principle of the metal-air battery is: during the discharge process, the negative electrode generates metal ions and electrons, the metal ions pass through the electrolyte material, and combine with oxygen and electrons at the positive electrode to form a solid metal oxide; during the charging process, the solid metal oxide The metal oxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/96H01M12/06
CPCH01M4/96H01M12/06H01M4/8605H01M4/9083H01M4/926H01M12/08H01M2004/8689Y02E60/10
Inventor 吴扬马顺超彭章泉王佳平姜开利范守善
Owner TSINGHUA UNIV
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