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Non-cobalt low-nickel hydrogen storage alloy

A technology of hydrogen storage alloy and general formula, which is applied in the field of hydrogen storage alloy, can solve the problems of high cost and high price of hydrogen storage alloy, and achieve the effect of performance optimization and reduction of alloy cost

Inactive Publication Date: 2011-09-14
XIAMEN TUNGSTEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since metal cobalt is a rare resource, the price is very high, resulting in high cost of hydrogen storage alloys

Method used

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  • Non-cobalt low-nickel hydrogen storage alloy
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Examples

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Embodiment 1

[0033] Embodiment 1~11 is to provide the sample prepared by formula according to the present invention, and the kinetic performance (C 300 / C 60 ) and cycle life are better than Comparative Example 1 and Comparative Example 2. Among them, the 1C maximum discharge capacity C of embodiment 1 and embodiment 7 300mA / g It reaches 270mAh / g, which is obviously better than 258mAh / g of Comparative Example 2.

[0034] From cost analysis, Ni, Cu, Mn, Al cost of embodiment 1~11 and comparative example 2 are basically the same, but the cost of lanthanum cerium alloy will be obviously lower than pure lanthanum metal, so total cost will be lower than comparative example 2 .

[0035] figure 1 Provide the XRD figure of embodiment 1, figure 2 The PCT figure of embodiment 1 is given.

[0036]Through the above analysis, it can be seen that the present invention has better solved the problems of poor service life and power performance of common cobalt-free low-nickel hydrogen storage alloys...

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Abstract

The invention discloses a non-cobalt low-nickel hydrogen storage alloy, relating to a hydrogen storage alloy. The invention provides a non-cobalt low-nickel hydrogen storage alloy which has the characteristics of moderate volume, good comprehensive electrochemical property, high cost performance and the like and can satisfy the requirements of parts of medium and low-volume nickel hydride batteries. The non-cobalt low-nickel hydrogen storage alloy belongs to an AB5 type and has the general formula of La(1-x)CexNiaCubMncAldMge, wherein x is more than or equal to 0.1 and less than or equal to 0.7, a is more than or equal to 2.0 and less than or equal to 3.3, b is more than or equal to 1.3 and less than or equal to 2.6, c is more than or equal to 0 and less than or equal to 0.4, d is more than or equal to 0 and less than or equal to 0.2, e is more than or equal to 0 and less than or equal to 0.1, and the sum of a, b, c, d and e is more than or equal to 4.7 and less than or equal to 5.2. An x value is more than or equal to 0.3 and less than or equal to 0.7; c can be more than or equal to 0.25 and less than or equal to 0.35; d can be more than or equal to 0.05 and less than or equal to 0.2; e can be more than or equal to 0.01 and less than or equal to 0.05; and the sum of a, b, c, d and e can be more than or equal to 4.8 and less than or equal to 5.1. The non-cobalt low-nickel hydrogen storage alloy has a CaCu 5 type single-phase structure.

Description

technical field [0001] The invention relates to a hydrogen storage alloy, in particular to a cobalt-free and low-nickel hydrogen storage alloy applied to a nickel-hydrogen battery. Background technique [0002] Hydrogen storage alloy is a new type of functional material, which has the properties of reversible hydrogen absorption and desorption under certain conditions, and is a main material for the negative electrode of nickel-metal hydride batteries. [0003] Ni-MH battery is a new type of green secondary battery. The traditional nickel-cadmium battery will pollute the environment due to the toxicity of the heavy metal cadmium contained in it. With the enhancement of people's awareness of environmental protection, it has been more and more restricted. Compared with nickel-cadmium batteries, nickel-metal hydride batteries have high energy density, no memory effect, good resistance to overcharge and discharge, and no environmental pollution problems. At the same time, it i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/02C22C19/03H01M4/38
CPCY02E60/12Y02E60/10
Inventor 蒋义淳陈跃辉陈永刚张永健吴雁青
Owner XIAMEN TUNGSTEN
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