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Positive electrode material of metal-air battery, and preparation method thereof

A metal-air battery and positive electrode material technology, applied in battery electrodes, fuel cell half-cells and secondary battery-type half-cells, nanotechnology for materials and surface science, etc., can solve the problem of low cycle life, charging Problems such as high energy consumption and hindering market applications can achieve the effect of improving adhesion, increasing contact area and space, and reducing electrode volume utility

Active Publication Date: 2020-07-03
金华高等研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although metal-air batteries have many advantages, especially the extremely high energy density is considered to be the best choice to replace fossil fuels, metal-air batteries still face some problems to be solved, especially the low cycle life and high charging energy consumption. The biggest obstacle hindering its application in the market

Method used

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  • Positive electrode material of metal-air battery, and preparation method thereof
  • Positive electrode material of metal-air battery, and preparation method thereof
  • Positive electrode material of metal-air battery, and preparation method thereof

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preparation example Construction

[0036] Based on the above, the present invention provides a positive electrode material for a metal-air battery and a preparation method thereof, as well as a metal-air battery and a preparation method thereof. details as follows:

[0037] The positive electrode material of the metal-air battery provided by the embodiment of the present invention includes: a metal mesh structure substrate, a photocatalytic active material layer covering the surface of the metal mesh structure, and a co-catalyst supported on the photocatalytic active material layer nanoparticles.

[0038] The air electrode cathode material provided by the present invention uses a non-carbon self-supporting substrate, that is, a metal mesh structure substrate as the substrate. The air photocatalyst positive electrode can effectively improve the adhesion between the material and the substrate, and improve the mechanical stability of the material; secondly, the metal substrate can ensure a good conductor for elec...

Embodiment 1

[0072] 1. Preparation of TiO on the surface of titanium mesh by electrochemical positive oxidation method 2 nanotube array

[0073] in NH 4 The ethylene glycol solution prepared by dissolving F and deionized water in ethylene glycol is used as the electrolyte, and anodized at a working voltage of 30V for 1h to obtain TiO on the surface. 2 The titanium mesh of the nanotube array, after the anodic oxidation, the titanium mesh was thoroughly cleaned with deionized water, and ultrasonically oscillated, then dried at 60°C, and then calcined in air at 500°C for 3h;

[0074] Prepared TiO 2 The morphology of the nanotube array is shown in figure 2 shown by figure 2 It can be seen that TiO with a porous structure was prepared on the titanium mesh 2 Nanotube arrays, compared with ordinary nanoparticle materials, can effectively increase the contact area and space between the material and the electrolyte, and at the same time provide sufficient deposition space for the discharge p...

Embodiment 2

[0082] 1. Ultrasonic wash the titanium mesh in a mixture of acetone-propanol (1:1, v / v, 30mL) for 30 minutes, then fully wash it with deionized water, and dry it in a nitrogen stream. Put the above-mentioned washed titanium mesh into a polytetrafluoroethylene liner filled with 2mL HF aqueous solution (0.1wt%), and react for a certain period of time at 140°C to obtain a non-carbon self-supporting titanium mesh-loaded TiO 2 nanoparticles.

[0083] 2. Using photocatalytic reduction deposition technology, the non-carbon self-supporting titanium mesh-loaded TiO obtained in step 1 2 The nanoparticle electrode sheet was placed in 0.3mM concentration of HAuCl 4 In the solution for 24 hours, and then irradiated by a 1000W Xe lamp for 90 minutes, a layer of gold nanoparticles can be deposited on the substrate as a cocatalyst;

[0084] 3. Take out the sample, wash it with deionized water, remove the solution or impurities adsorbed on the surface, and dry it at 70°C under vacuum;

[00...

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Abstract

The invention relates to the field of metal-air batteries, particularly to a positive electrode material of a metal-air battery, a preparation method of the positive electrode material, the metal-airbattery and a preparation method of the metal-air battery. The positive electrode material of the metal-air battery comprises a metal mesh structure substrate, a photocatalytic active material layer covering the surface of the metal mesh structure substrate, and cocatalyst nanoparticles loaded on the photocatalytic active material layer. The metal-air battery and the positive electrode material thereof provided by the invention have the advantages of good stability, high battery efficiency, low charging overpotential, low battery cost, high volumetric specific energy and the like under the conditions of the same capacity and energy density, and are easy to realize combination of solar energy and an energy storage system.

Description

technical field [0001] The invention relates to the field of metal-air batteries, in particular to a positive electrode material of a metal-air battery and a preparation method thereof. Background technique [0002] A metal-air battery is a clean energy battery that uses active metals such as magnesium, aluminum, zinc, etc. as the negative electrode, and oxygen or pure oxygen in the air as the active material of the positive electrode. Metal-air batteries (such as lithium-oxygen batteries, sodium-oxygen batteries, etc.) compared with widely used lithium-ion batteries, their oxygen comes from the air and does not need to be stored inside the battery, which greatly reduces the weight of the battery and thus has a very high Specific capacity and energy density. Therefore, it has a very broad application prospect in the field of electric energy storage, and can be applied to new generation electronic products, electric transportation and other fields. [0003] Metal-air batter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/90H01M4/88H01M12/08B82Y30/00
CPCH01M4/8657H01M4/8825H01M4/8803H01M12/08H01M4/9016H01M4/9075B82Y30/00H01M2004/8689Y02E60/10
Inventor 童圣富
Owner 金华高等研究院
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