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Cathode catalyst for rechargeable metal-air battery and rechargeable metal-air battery

A metal-air battery and cathode catalyst technology, which is applied in the direction of fuel cell half-cells and secondary battery-type half-cells, fuel cell-type half-cells and primary battery-type half-cells, battery electrodes, etc., and can solve the problem of charging Low discharge efficiency, low initial capacity, low capacity retention rate, etc., to achieve the effect of improving capacity retention rate, excellent electrochemical performance, and increasing initial capacity

Inactive Publication Date: 2013-04-03
TOYOTA JIDOSHA KK +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0033] However, even with the conventional cathode catalysts for rechargeable metal-air batteries disclosed in the above Patent Documents 1 to 4 and Non-Patent Documents 1-9, there are the following problems in such batteries: (1) initial capacity low; (2) large difference between discharge voltage and charge voltage value, making charge and discharge efficiency low; and, (3) low capacity retention rate, making cycleability poor

Method used

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  • Cathode catalyst for rechargeable metal-air battery and rechargeable metal-air battery
  • Cathode catalyst for rechargeable metal-air battery and rechargeable metal-air battery
  • Cathode catalyst for rechargeable metal-air battery and rechargeable metal-air battery

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Embodiment 1

[0098] (NiFe 2 o 4 Synthesis)

[0099] According to the method disclosed in Non-Patent Document 10, NiFe 2 o 4 The synthesis is as follows.

[0100] First, the Ni(NO 3 ) 2 ·6H 2 O and Fe(NO 3 ) 3 9H 2 O was dissolved in deionized water to prepare the mixture. In this mixture, Ni(NO 3 ) 2 ·6H 2 O to Fe(NO 3 ) 3 9H 2 The molar ratio of O is 1:2.

[0101] The mixture was mixed for 2 hours, and then, an ammonia solution was added thereto while mixing to adjust the pH of the mixture to 8.

[0102] Next, the obtained solution was poured into a Teflon-coated stainless steel autoclave, and heated to 230° C. at a heating rate of 5° C. / min, and the temperature of the solution was maintained for 30 minutes.

[0103] Then, the autoclave was air-cooled to room temperature, and the precipitate thus obtained was washed several times by distilled water, and subsequently, the precipitate was dried at 80°C.

[0104] The obtained precipitate was analyzed by X-ray diffraction (...

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Abstract

The present invention is to provide a cathode catalyst capable of increasing the initial capacity, decreasing the charging voltage and improving the capacity retention of a rechargeable metal-air battery, and a rechargeable metal-air battery having high initial capacity, excellent charge-discharge efficiency, and excellent capacity retention. A cathode catalyst for a rechargeable metal-air battery comprising NiFe2O4, and a rechargeable metal-air battery comprising an air cathode containing at least NiFe2O4, an anode containing at least a negative-electrode active material and an electrolyte interposed between the air cathode and the anode.

Description

technical field [0001] The present invention relates to cathode catalysts for rechargeable metal-air batteries and rechargeable metal-air batteries. Background technique [0002] In recent years, with the rapid and widespread use of information-related devices and communication devices such as computers, video cameras, and cellular phones, emphasis has been placed on the development of batteries used as power sources for the above devices. Also, in the automobile industry, the development of batteries for electric vehicles and hybrid vehicles with high output and capacity is encouraged. Among various batteries, rechargeable lithium batteries have attracted attention because of their high energy density and high output. [0003] Li-air batteries are of particular interest as rechargeable lithium batteries for electric vehicles and hybrid vehicles requiring high energy density. Li-air batteries use oxygen in the air as the positive electrode active material. Therefore, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M12/06H01M4/86H01M4/90H01M4/88H01M4/38
CPCH01M4/381H01M4/8615H01M4/8673H01M4/9016H01M12/08H01M4/382H01M4/8828Y02E60/50H01M4/8668Y02E60/128H01M12/06Y02E60/10
Inventor 法尼·让内·朱莉·巴尔德劳伦斯·詹姆斯·哈德威克彼得·乔治·布鲁斯斯特凡·弗罗因贝格尔
Owner TOYOTA JIDOSHA KK
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