Zirconium and titanium-doped A2B7 type rare earth-yttrium-nickel family hydrogen storage alloy

A technology of hydrogen storage alloys and rare earths, which is applied to electrical components, battery electrodes, circuits, etc., can solve the problems of increased manufacturing difficulty, difficult control of alloy components, and potential safety hazards, and achieves simple, safe, and The effect of good activation properties

Active Publication Date: 2015-04-15
BAOTOU RES INST OF RARE EARTHS +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high vapor pressure of the active metal element magnesium, the manufacturing difficulty is increased, and the alloy composition is difficult to control. At the same time, the volatilized fine magnesium powder is flammable and explosive, which poses a safety hazard.

Method used

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  • Zirconium and titanium-doped A2B7 type rare earth-yttrium-nickel family hydrogen storage alloy
  • Zirconium and titanium-doped A2B7 type rare earth-yttrium-nickel family hydrogen storage alloy
  • Zirconium and titanium-doped A2B7 type rare earth-yttrium-nickel family hydrogen storage alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 14

[0022] The alloys described in Example 14 and Example 15 were prepared using the same ratio of raw materials. The alloy described in Example 14 is prepared by the aforementioned high-temperature smelting-quick quenching method. The process is as follows: the purity of each elemental metal or intermediate alloy raw material in the composition is >99.0%, and the ratio of each raw material is calculated according to the chemical molecular formula and accurately weighed ( Raw materials that are easy to burn need to increase the ratio in an appropriate amount), put the raw materials into Al 2 o 3 The crucible is evacuated to 3.0Pa and filled with inert gas Ar to 0.055MPa. Heat up and smelt, keep warm for about 6 minutes and then quickly solidify. The speed of the quick-setting copper roller is 3.4m / s. The copper roller is usually fed with cooling water, and the temperature of the cooling water is 25°C.

Embodiment 15

[0023] The alloy described in Example 15 can also be prepared by high-temperature smelting-quick quenching method, and an annealing heat treatment step is added in the process, specifically: the purity of each elemental metal or intermediate alloy raw material in the composition is >99.0%, and the ratio is according to the chemical molecular formula Calculate and accurately weigh each raw material (the proportion of easy-to-burn raw materials needs to be increased in an appropriate amount), and put the raw materials into Al 2 o 3 The crucible is evacuated to 3.0Pa and filled with inert gas Ar to 0.055MPa. Heat up and smelt, keep warm for about 6 minutes and then quickly solidify. The speed of the quick-setting copper roller is 3.4m / s. The copper roller is usually fed with cooling water, and the temperature of the cooling water is 25°C. The quick-setting alloy is annealed at 750°C for 8 hours under the protection of vacuum or inert gas.

Embodiment 28

[0024] M1 in Example 28 is a lanthanum-rich mixed rare earth metal, which contains about 64% of La, about 25% of Ce, about 3% of Pr, and about 8% of Nd.

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Abstract

The invention relates to a rare earth family hydrogen storage alloy with the general formula of RExYyNiz-a-b-cMnaAlbMcZrATiB. The highest capacity of the rare earth family hydrogen storage alloy which is an electrode is higher than that of LaNi5 type hydrogen storage alloy. A preparation method of the rare earth family hydrogen storage alloy is simple and safe. The rare earth family hydrogen storage alloy has good activation performance, rate discharge ability, and charge and discharge or hydrogen absorption and desorption cycle stability, can be used in a wide temperature range, has small self discharge, and can be used to produce negative electrodes of alkaline secondary batteries, and secondary batteries containing the hydrogen storage alloy disclosed in the invention.

Description

technical field [0001] The invention relates to a kind of A containing zirconium and titanium elements 2 B 7 type rare earth-yttrium-nickel hydrogen storage alloy. Background technique [0002] Hydrogen storage alloys are a class of functional materials with high hydrogen storage density discovered in the late 1960s. The existing hydrogen storage alloys can be roughly divided into six categories in terms of composition: rare earth series AB 5 type like LaNi 5 ; Magnesium series such as Mg 2 Ni, MgNi, La 2 Mg 17 ;Rare earth-magnesium-nickel system AB 3-3.5 type like La 2 MgNi 9 , La 5 Mg 2 Ni 23 , La 3 MgNi 14 ;Titanium-based AB type such as TiNi, TiFe; zirconium, titanium-based Laves phase AB 2 Type such as ZrNi 2 ; Vanadium series solid solution type such as (V 0.9 Ti 0.1 ) 1-x Fe x . [0003] The widely used hydrogen storage material is LaNi 5 type hydrogen storage alloy. The alloy is mainly used as the negative electrode material of metal hydride-nic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/03C22C30/00C22C30/02C22C30/04H01M4/38
CPCY02E60/10
Inventor 熊玮闫慧忠李宝犬王利李金
Owner BAOTOU RES INST OF RARE EARTHS
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