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Composite electrode for air battery and preparation method thereof

A composite electrode and air battery technology, applied in the direction of primary battery electrodes, battery electrodes, fuel cell half-cells and primary battery half-cells, etc., can solve the problem of reducing energy density and other issues

Active Publication Date: 2021-06-01
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the aluminum-air battery itself also has a very serious problem, that is, the self-corrosion between it and the electrolyte produces hydrogen, resulting in only 10%-20% of the total energy available.
[0004] Traditional self-corrosion mitigation methods, such as changing the pH value of the electrolyte, etc., will greatly reduce the discharge potential while reducing corrosion, thereby reducing the available energy density

Method used

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  • Composite electrode for air battery and preparation method thereof
  • Composite electrode for air battery and preparation method thereof
  • Composite electrode for air battery and preparation method thereof

Examples

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Embodiment approach

[0053]According to a preferred embodiment of the present invention, the aluminum electrode 1 and the hydrogen storage alloy electrode 2 are fixed together by mechanical force.

[0054] In a further preferred embodiment, the aluminum electrode 1 and the hydrogen storage alloy electrode 2 are fixed together by the mechanical force inside the battery to complete the assembly of the composite electrode.

[0055] Among them, the hydrogen storage alloy itself has the ability to absorb and release hydrogen in a cycle. After the aluminum is consumed, the special electrode structure design makes it easy to complete the mechanical cycle of the aluminum electrode part. In the process of replacing the aluminum electrode, the hydrogen storage alloy electrode will not be changed. It can still maintain its original performance and continue to improve the overall energy utilization rate.

[0056] Moreover, in the present invention, the aluminum material and the hydrogen storage alloy material...

Embodiment 1

[0092] Take 135 mg of LaNi with a particle size of about 1 micron 5 Powder, pressed into an area of ​​1.33cm under 40Mpa pressure 2 sheet, and then pressed with foamed nickel to form a hydrogen storage alloy electrode;

[0093] Use a slicer to make an aluminum sheet with a mass of 45 mg and an area of ​​1.33 cm 2 aluminum sheet, and then press it with nickel foam to make an aluminum electrode;

[0094] The prepared aluminum electrode and the hydrogen storage alloy electrode are overlapped and fixed together by the mechanical force inside the battery to complete the electrode assembly, and placed in 1M KOH to make an air battery.

Embodiment 2

[0096] Repeat the process of embodiment 1, difference is: LaNi 5 The dosage of the powder is 270mg.

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Abstract

The invention discloses a novel composite electrode for an air battery and its preparation, wherein the novel composite electrode comprises an aluminum electrode (1) and a hydrogen storage alloy electrode (2), wherein the aluminum electrode (1) comprises An aluminum layer (11) and a current collector (12) arranged on the outer surface of the aluminum layer (11), the hydrogen storage alloy electrode (2) includes a hydrogen storage alloy layer (21) and a hydrogen storage alloy layer (21) arranged on the hydrogen storage alloy layer (21) The current collector 2 (22) on the outer surface; in this way, a large amount of hydrogen generated by the self-corrosion of the aluminum-air battery is absorbed by the hydrogen storage alloy, and the hydrogen storage alloy after hydrogen absorption can lose hydrogen through an electrochemical process, thereby becoming a battery that provides energy. Moreover, due to the special structure of the composite electrode, in the process of replacing the aluminum electrode after the consumption of aluminum, the hydrogen storage alloy electrode is not changed, and its original performance can still be maintained, so as to continue to improve the overall energy utilization rate.

Description

technical field [0001] The invention relates to the field of air batteries, in particular to electrodes, in particular to a composite electrode for air batteries and a preparation method thereof. Background technique [0002] Aluminum-air battery is a primary battery with a huge theoretical specific capacity (8100Wh / kg). It is widely used in marine power sources and submarine AIP systems, and has the advantages of light weight and non-toxic hazards. [0003] However, the aluminum-air battery itself also has a very serious problem, that is, the self-corrosion between it and the electrolyte produces hydrogen, resulting in only 10%-20% of the total energy available. [0004] Traditional methods to mitigate self-corrosion, such as changing the pH value of the electrolyte, will greatly reduce the discharge potential while reducing corrosion, thereby reducing the available energy density. Contents of the invention [0005] In order to solve the above-mentioned problems, the pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/06H01M4/12H01M4/66H01M12/06
CPCH01M4/06H01M4/12H01M4/662H01M4/667H01M12/06
Inventor 肖锐姜晓静熊子晴郑捷李星国
Owner PEKING UNIV