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Metal air battery and preparation method thereof

A metal-air battery and air electrode technology, which is applied in the direction of fuel cell half-cells and primary battery-type half-cells, can solve the problems of slow reaction rate and energy conversion efficiency, and achieve low cost, long service life and simple process Effect

Pending Publication Date: 2018-05-18
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The two-electron reaction plays an important role in the fields of environmental pollution control and chemical synthesis, but in the field of energy conversion, the electrocatalytic efficiency of the cathodic oxygen reduction reaction is higher through the four-electron pathway, and the slow reaction rate of the cathodic four-electron oxygen reduction is a constraint for metal- One of the most important factors in the energy conversion efficiency of air batteries

Method used

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  • Metal air battery and preparation method thereof
  • Metal air battery and preparation method thereof
  • Metal air battery and preparation method thereof

Examples

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preparation example Construction

[0029] see figure 1 , a method for preparing a metal-air battery provided by the implementation of the present invention, comprising:

[0030] Step S101 : providing a substrate, sandblasting and cleaning the substrate.

[0031] In step S101, please refer to figure 2 , the material of the substrate 10 includes one or more of titanium, tantalum, niobium, molybdenum, chromium, silicon, graphite, carbon fiber and cemented carbide. The cleaning includes pickling or alkaline cleaning. The specific operation of cleaning is as follows: heat the substrate 10 in an acidic solution or an alkaline solution to 80°C-100°C, and soak for 10min-30min. Optionally, when the cleaning is pickling, the pickling solution includes sulfuric acid and hydrogen peroxide, wherein the volume ratio of sulfuric acid and hydrogen peroxide is 1:10-15. Optionally, when the cleaning is alkaline cleaning, the alkaline solution of alkaline cleaning includes hydrogen peroxide, ammonium hydroxide and water, whe...

Embodiment 1

[0043] A method for preparing a metal-air battery, comprising the steps of:

[0044] Step 1: Take the niobium substrate, and after blasting the niobium substrate, ultrasonically clean the niobium substrate in acetone and alcohol for 10 minutes respectively. Then place the niobium substrate in an acidic solution of sulfuric acid and hydrogen peroxide with a volume ratio of 1:15, heat it to 100°C, and soak for 30 minutes. Remove surface oxides and cause certain defects for subsequent deposition, and then use deionized water to ultrasonically clean for 10 minutes. Subsequently, the acid-washed niobium matrix was placed in nano-diamond powder suspension and ultrasonically treated for 1 hour.

[0045] Step 2: Deposit a boron-nitrogen co-doped diamond layer on the cleaned niobium substrate by hot wire chemical vapor deposition. During the preparation process, the gases introduced include nitrogen, methane, trimethylborane and hydrogen, nitrogen The flow rate was 24 sccm, the flow ...

Embodiment 2

[0049] A method for preparing a metal-air battery, comprising the steps of:

[0050] Step 1: Take the titanium substrate, and after sandblasting the titanium substrate, ultrasonically clean the titanium substrate in acetone and alcohol for 10 minutes respectively. Then place the titanium substrate in an alkaline solution of hydrogen peroxide, ammonium hydroxide and water at a volume ratio of 1:1:5, heat it to 80°C, and soak for 30 minutes. Remove surface oxides and cause certain defects for subsequent deposition, and then use deionized water to ultrasonically clean for 10 minutes. Subsequently, the acid-washed titanium substrate was placed in the suspension of nano-diamond powder for ultrasonic treatment for 2 hours.

[0051] Step 2: Deposit a boron-nitrogen co-doped diamond layer on the cleaned titanium substrate by hot wire chemical vapor deposition. During the preparation process, the gases introduced include nitrogen, methane, trimethylborane and hydrogen, nitrogen The f...

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Abstract

The invention provides a metal air battery, comprising an air electrode, a metal electrode and electrolyte arranged between the air electrode and the metal electrode; the air electrode includes a baseand a boron-nitrogen co-doped diamond layer arranged on the surface of the base; the boron-nitrogen co-doped diamond layer comprises a flat structure layer arranged on the surface of the base and anarray protrusion structure arranged on the surface of the flat structure layer. The array protrusion structure can provide enlarged specific surface area for the air electrode, exposing more active sites and allowing electrons to be easily transported on particle surface; diffusion resistance and range can be decreased for particle components, reducing capacity of particle components is improved,and therefore, the metal air battery has improved catalytic efficiency.

Description

technical field [0001] The invention relates to the field of metal-air batteries, in particular to a metal-air battery and a preparation method thereof. Background technique [0002] Metal-air battery is a special fuel cell that uses metal as fuel to generate electricity through oxidation-reduction reaction with oxygen in the air. It has good development and application prospects, and is even expected to replace the current main power battery type of new energy vehicles. The raw materials that can be used to make metal-air batteries are relatively abundant. At present, the metal-air batteries that have made research progress mainly include aluminum-air batteries, magnesium-air batteries, zinc-air batteries, and lithium-air batteries. Some of these types of metal-air batteries are ready for mass production, some are still in the laboratory stage, and some have achieved good application results in electric vehicles and will soon be loaded with new energy vehicles on a large sc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M12/06
CPCH01M12/06
Inventor 杨扬唐永炳李子豪谷继腾张文军
Owner SHENZHEN INST OF ADVANCED TECH
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