A yttrium-nickel rare earth hydrogen storage alloy and a secondary battery containing the hydrogen storage alloy

A hydrogen storage alloy and secondary battery technology, applied in battery electrodes, alkaline battery electrodes, circuits, etc., can solve the problems of difficult control of alloy composition, potential safety hazards, and increased manufacturing difficulty, and achieve the elimination of alloy structural stress and Component segregation, improving electrical and thermal conductivity, improving hydrogen absorption and cycle life
CN104513925BActive Publication Date: 2017-05-03BAOTOU RES INST OF RARE EARTHS +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BAOTOU RES INST OF RARE EARTHS
Publication Date
2017-05-03

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Abstract

A yttrium-nickel rare earth hydrogen storage alloy and a secondary battery containing the hydrogen storage alloy of the present invention relate to an AB3 type RExYyNiz-a-bMnaAlb hydrogen storage electrode alloy. The alloy has good activation performance, rate discharge capability, cycle stability of charging and discharging or hydrogen absorption and desorption, can be used in a wide temperature range, has small self-discharge, and its maximum electrochemical capacity can reach more than 360mAh·g-1 . The electrochemical performance of the alloy as a hydrogen storage electrode and the gas-phase hydrogen absorption and desorption performance as a hydrogen storage material are superior to those of the traditional LaNi5 type hydrogen storage alloy. In comparison, the fabrication method is simple and safe.
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Description

technical field

[0001] The present invention relates to an AB 3 Type RE-Y-NiMnAl 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 3-4 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-nickel secondary battery (MH / Ni), and its theoretical electrochem...

Claims

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