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Method for charging zinc-air batteries using a constrained potential

A technology of zinc-air battery and air electrode, which is applied in the direction of secondary battery charging/discharging, fuel cell-type half-cell and secondary battery-type half-cell, electrical components, etc., and can solve unsolved problems and other problems

Active Publication Date: 2018-01-09
ELECTRICITE DE FRANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0028] Despite these various proposals, the problems encountered during the recharging of zinc-air batteries have not been resolved

Method used

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  • Method for charging zinc-air batteries using a constrained potential
  • Method for charging zinc-air batteries using a constrained potential

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Embodiment Construction

[0047] In this application, the terms "charging" and "recharging" are used synonymously and interchangeably.

[0048] The charging method according to the invention is implemented on a zinc-air battery. The zinc-air battery generally includes at least one negative electrode, a first positive air electrode and a second positive oxygen evolution electrode. The negative electrode is a zinc electrode (Zn / Zn 2+ ).

[0049] The first positive electrode of the battery according to the invention is an air electrode. Electrodes of this type are generally described above. Any type of air electrode can be used in a battery according to the invention. In particular, the first positive air electrode of the cell may be an electrode obtained by agglomeration of carbon powder consisting of carbon particles with a large specific surface area, as described in patent application WO 2000 / 036677. The carbon particle based air battery may also include at least one oxygen reduction catalyst. T...

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Abstract

The invention relates to a method for charging a zinc-air battery, characterized in that the potential of the negative electrode during charging is less than or equal to a critical charging potential value. The invention also relates to a method for storing and re-storing electrical energy comprising such a charging step, and to a zinc-air battery and a discharge phase suitable for implementing said charging method.

Description

technical field [0001] The present invention relates to an electrochemical method for charging a zinc-air type battery using an aqueous electrolyte and a method for storing and releasing electrical energy comprising a charging step according to the invention. Background technique [0002] Metal-air batteries use a negative electrode based on a metal such as zinc, iron, or lithium coupled to an air electrode. The most commonly used electrolyte is an alkaline aqueous electrolyte. [0003] During discharge of such a cell, oxygen is reduced at the positive electrode and metal is oxidized at the negative electrode: [0004] Discharge at the negative electrode: M→M n+ +n e - [0005] Discharge at positive electrode: O 2 +2H 2 O+4e - →4OH - [0006] When it is necessary to electrically recharge a metal-air battery, the direction of the current flow is reversed. Oxygen is produced at the positive electrode and metal is redeposited by reduction at the negative electrode. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M12/08H01M10/44
CPCH01M10/44H01M12/08H01M10/446Y02E60/10H02J7/007H01M2300/0014
Inventor 格温艾尔·图森特菲力浦·史蒂文斯
Owner ELECTRICITE DE FRANCE