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A Porous Carbon Nanodiamond Composite Air Electrode for Oxygen-Metal Batteries

A nano-diamond, air electrode technology, applied in battery electrodes, fuel cell type half cells and primary cell type half cells, structural parts, etc., can solve the problem of low battery power density, low oxygen concentration in electrodes, and oxygen adsorption. Low rate and other problems, to achieve the effect of good oxygen adsorption capacity

Active Publication Date: 2021-03-02
赵效铭
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Oxygen reaches the three-phase interface of gas, solid and liquid through the electrodes, and the existing air electrodes have low oxygen adsorption rate and low oxygen concentration in the electrodes, resulting in low power density of oxygen-metal batteries

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0015] The preparation method of the air composite electrode based on the oxygen-metal battery is characterized in that it comprises the following steps:

[0016] Step 1: Use various carbon powders such as graphite powder, carbon black powder, and amorphous carbon powder to sinter or bond to form a porous carbon electrode with a predetermined density and predetermined size. The porosity of the carbon electrode is controlled at 5%-20%.

[0017] Step 2: Dip the porous carbon electrode into the nano-diamond colloid solution, the nano-diamond colloid solution is filled into the carbon electrode hole under the action of capillary phenomenon, take out the carbon electrode from the solution and dry it naturally or heat it to remove the moisture in the solution in the carbon electrode hole , so that the diamond particles are deposited in the pores of the carbon electrode. The immersion process and the drying process are repeated 2-10 times, and the volume filling rate of the nano-diam...

Embodiment 1

[0019] Use 60mm*60mm*5mm porous carbon material as the cathode of the battery, immerse the carbon electrode in a 10nm diamond colloid solution with a weight of 10%, and the nano-diamond colloid solution is filled into the carbon electrode hole under the action of capillary phenomenon, and the porous carbon is taken out from the solution The electrode is placed in a room at room temperature of 25°C to dry naturally for 24 hours to remove the moisture in the solution in the pores of the carbon electrode, so that the diamond particles are deposited in the pores of the carbon electrode. Repeat 5 times to control the volume filling rate of nano-diamond in the carbon electrode hole at 30%. Five pieces of porous carbon materials of this size were surrounded to form a cube container with one end open, and 4mol / L NaOH solution was injected as electrolyte. The 5A06 aluminum alloy sample is used as the anode of the oxygen-aluminum fuel cell. The sample is a 5mm*5mm thin sheet with a thic...

Embodiment 2

[0021] A 60mm*60mm*5mm porous carbon material is used as the cathode of the battery, and the nano-diamond colloid solution is filled into the carbon electrode hole, and the porous carbon electrode is taken out from the solution, placed in an electric heating drying furnace, and dried at 80°C for 2 hours. The water in the solution in the pores of the carbon electrode is removed, so that the diamond particles are deposited in the pores of the carbon electrode. Repeat 10 times to control the nanodiamond volume filling rate in the carbon electrode hole to 50%. Five pieces of porous carbon materials of this size were surrounded to form a cube container with one end open, and 4mol / L NaOH solution was injected as electrolyte. The industrial 99.8% zinc plate is used as the anode of the aluminum oxide fuel cell. The size of the zinc plate is 500 mm in length, 50 mm in width, and 5 mm in thickness. The zinc plate is rolled into a multi-layer cylindrical shape as the anode. The insulati...

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Abstract

A porous carbon nano-diamond composite structure air electrode for an oxygen-metal battery, which can be used in an oxygen-metal battery. By adding an appropriate amount of nano-diamond to the carbon electrode (positive electrode) of the oxygen-metal battery, the dissolved oxygen concentration in the carbon electrode is provided by utilizing the characteristic of adsorbing oxygen molecules on the surface of the nano-diamond. At the same time, the traditional air electrode is changed from the gas phase to the liquid phase in which the oxygen in the air electrode participates in the interface reaction when the battery is working, and the mass transfer rate is improved.

Description

technical field [0001] The invention relates to a composite air electrode based on an oxygen-metal battery, in particular adding nano-diamonds to the air electrode so that the air electrode can obtain more oxygen to participate in the reaction. Oxygen-metal batteries here include metal-air batteries. Background technique [0002] Since oxygen-metal also has higher energy density compared with other batteries, the battery uses oxygen as the cathode reactant and metals such as magnesium, aluminum, and zinc as the anode reactant. These materials are rich in resources, and the reaction products are oxides of magnesium, aluminum, and zinc, which can be recycled and recycled, and are high-performance and environmentally friendly batteries. The positive electrode (also known as the air electrode) of the oxygen-metal battery has a three-phase interface of gas, solid and liquid that collects electricity and forms oxygen to participate in the reaction. Oxygen reaches the three-phase...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M4/96H01M12/06
CPCH01M4/9075H01M4/96H01M12/06
Inventor 赵效铭
Owner 赵效铭
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