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Air electrode for metal-air battery and metal air battery

An air electrode and air battery technology, applied in the field of air electrodes and metal-air batteries for metal-air batteries, can solve problems such as difficulties and deterioration of metal-air batteries, and achieve the effects of improving output characteristics and suppressing performance deterioration.

Inactive Publication Date: 2014-01-29
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the presence of water in the battery also leads to the deterioration of metal-air batteries, the generation of water by hydrogen reduction does not fundamentally solve the problem.
In addition, in lithium-air batteries, which are representative examples of metal-air batteries, it is very difficult to suppress the generation of trace amounts of hydrogen

Method used

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  • Air electrode for metal-air battery and metal air battery
  • Air electrode for metal-air battery and metal air battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Preparation of a metal-air battery will be described. The preparation of the air electrode will be described at the beginning. First, fabricate Ag in the manner shown below 2 O-B 2 o 3 base glass. That is, the Ag 2 O and B 2 o 3 Ag was prepared by mixing and grinding at a molar ratio of 50:50 2 O-B 2 o 3 Base glass (hereinafter referred to as 50Ag 2 O-50B 2 o 3 ). During grinding, the ZrO 2 Balls and a predetermined amount of Ag 2 O and B 2 o 3 Put in ZrO 2 jar and grind. at 50Ag 2 O-50B 2 o 3 In the glass, the ratio of non-crosslinked B-O bonds was 50% (see Table 1). Subsequently, carbon black (Ketjen Black, manufactured by Ketjen Black International), 50Ag 2 O-B 2 o 3 Glass and PTFE binder (manufactured by Daikin Industries, Ltd.) were kneaded with ethanol solvent at a weight ratio of 40:30:30, and then, the mixture was calendered by a roll press and formed into a sheet. The sheet was cut after vacuum drying to obtain an air electrode.

[00...

Embodiment 2

[0059] Ag 2 O and B 2 o 3 Ag was prepared by mixing at a molar ratio of 25:75 2 O-B 2 o 3 Base glass (hereinafter referred to as 25Ag 2 O-75B 2 o 3 Glass). In addition to using 25Ag 2 O-75B 2 o 3 Glass instead of 50Ag 2 O-50B 2 o 3 Except for the glass, an air electrode and a lithium-air battery were fabricated in the same manner as in Example 1. 25Ag 2 O-75B 2 o 3 The ratio of non-crosslinked B-O bonds in the glass was 25% (see Table 1).

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Abstract

An air electrode for a metal-air battery that includes the air electrode(1), a negative electrode(2), and an electrolyte provided between the air electrode and the negative electrode. The air electrode includes non-crosslinking oxygen-containing MxOy-based glass that contains a non-crosslinking oxygen that is an oxygen (O) that bonds to M constituting the MxOy-based glass and bonds to Ag, MxOy of the MxOy-based glass being at least one kind selected from the group of B2O3, P2O5, SiO2, GeO2, and Al2O3.

Description

technical field [0001] The present invention relates to an air electrode for a metal-air battery and a metal-air battery having the air electrode. Background technique [0002] A metal-air battery using oxygen as a positive electrode active material has advantages such as high energy density and easy reduction in size and weight. Therefore, it has attracted attention as a high-capacity battery exceeding lithium ion secondary batteries widely used at present. As metal-air batteries, there are known, for example, lithium-air batteries, magnesium-air batteries, and zinc-air batteries. A metal-air battery can be charged / discharged by performing a redox reaction of oxygen in an air electrode (positive electrode) and a redox reaction of a metal contained in the negative electrode in a negative electrode. For example, in a metal-air battery (secondary battery) in which conductive ions are monovalent metal ions, the following charge-discharge reaction is considered to proceed. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M12/06
CPCH01M4/405H01M4/9016H01M12/08H01M4/90H01M10/052Y02E60/50H01M4/8673H01M2004/8689Y02E60/10
Inventor 南圭一冈崎早苗
Owner TOYOTA JIDOSHA KK