La-Mg-Ni series hydrogen storage alloy for low-temperature nickel-hydrogen battery and preparation method of La-Mg-Ni series hydrogen storage alloy

A technology for nickel-hydrogen batteries and hydrogen storage alloys, applied in the negative electrode materials of nickel-hydrogen batteries, La-Mg-Ni hydrogen storage alloys for low-temperature nickel-hydrogen batteries and their preparation fields, can solve problems such as unsatisfactory cycle life, and achieve Convenient operation, simple process, high and low temperature electrochemical performance effect
CN108149073AInactive Publication Date: 2018-06-12ADVANCED TECHNOLOGY & MATERIALS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ADVANCED TECHNOLOGY & MATERIALS CO LTD
Publication Date
2018-06-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a La-Mg-Ni series hydrogen storage alloy for a low-temperature nickel-hydrogen battery and a preparation method of the La-Mg-Ni series hydrogen storage alloy. The chemical component of the alloy is La<0.75-x>CexMg0.25Ni3Co0.5, wherein the subscripts in the chemical component are atomic ratios of corresponding constituents, and the value range of x is 0.09-0.11. The preparation method of the alloy comprises the following steps of raw material preparation; smelting and casting; alloy thin strip preparation; and grinding and screening. The alloy prepared by the method hashigh low-temperature electrochemical performance, and under the condition of 248K, at the quenching rate of 10 m.s<-1>, when charging and discharging are circulated 100 times, the discharge capacity of the alloy reaches the maximum value of 245.9 mAh.g<-1>. An alloy material prepared by the preparation method is particularly suitable for being used under the condition of zero DEG C or below, particularly under the condition of minus 25 DEG C and even under the condition of minus 30 DEG C.
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Description

technical field

[0001] The invention belongs to the field of preparation of hydrogen storage materials, and in particular relates to a La-Mg-Ni hydrogen storage alloy for low-temperature nickel-hydrogen batteries and a preparation method thereof. The hydrogen storage alloy is particularly suitable as a negative electrode material for nickel-hydrogen batteries used under low temperature conditions . Background technique

[0002] In recent years, the popularity and development of fuel vehicles have made environmental problems such as air pollution more and more serious. Therefore, the development of new energy vehicles is imminent. Among them, hybrid electric vehicles (HEV) and pure electric vehicles ( EV) has attracted widespread attention from all over the world due to its excellent performance, high safety, stable structure, and environmental friendliness. Therefore, with the vigorous development of the Ni / MH battery industry, hydrogen storage alloys as battery anode mater...

Claims

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