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Manufacture method for ti-based hydrogen storage alloy

A hydrogen storage alloy, titanium-based technology, applied in the field of alloy materials, can solve the problems of poor electrochemical cycle stability, slow hydrogen absorption/desorption rate, poor reaction kinetic performance, etc., and achieves hydrogen absorption/desorption capacity retention rate. and the effects of improved cycle life, improved discharge capacity, and improved uniformity

Active Publication Date: 2017-12-22
国工恒昌新材料(义乌)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the products obtained by ball milling of existing titanium-based hydrogen storage alloys have poor electrochemical cycle stability, poor reaction kinetics, slow hydrogen absorption / desorption rate and high hydrogen release temperature, which limits the application of magnesium-based hydrogen storage alloys. In the process of commercialization, there is an urgent need to modify existing magnesium-based hydrogen storage alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A preparation method of a titanium-based hydrogen storage alloy, characterized in that the preparation method comprises the following steps: (1) vacuuming the intermediate frequency melting furnace, and introducing argon gas when the vacuum degree reaches 0.1-1Pa. (2) Press La 0.5 PR 0.2 Ca 0.5 Ti 1.2 Ni 0.8 co 0.7Perform batching, and put the prepared alloy raw materials into the furnace body of step (1). (3) After the alloy raw material in step (2) in the furnace is energized and melted, add argon gas into the furnace again to make the pressure reach 500 Pa, and stabilize the temperature of the melt at 1200°C. (4) Pour the melt of step (3) into an air pressure casting holding furnace filled with nitrogen for heat preservation, and then pour the melt in the holding furnace into a water-cooled copper mold. Before pouring, the mold should be preheated to 300°C. A hydrogen storage alloy is obtained. (5) Under an inert atmosphere, first heat the hydrogen storage all...

Embodiment 2

[0028] A preparation method of a titanium-based hydrogen storage alloy, characterized in that the preparation method comprises the following steps: (1) vacuumize the intermediate frequency melting furnace, and feed argon gas when the vacuum degree reaches 0.1-1Pa; (2) press La 0.2 PR 0.8 Ca 1.8 Ti 2.2 Ni 0.5 co 0.4 Perform batching, and put the prepared alloy raw materials into the furnace body of step (1). (3) After the alloy raw material in step (2) in the furnace is energized and melted, add argon gas into the furnace again to make the pressure reach 600 Pa, and stabilize the temperature of the melt at 1300°C. (4) Pour the melt of step (3) into a pressure casting holding furnace filled with nitrogen for heat preservation, and then pour the melt in the holding furnace into a water-cooled copper mold. Before pouring, the mold should be preheated to 400°C. A hydrogen storage alloy is obtained. (5) Under an inert atmosphere, heat the hydrogen storage alloy obtained in st...

Embodiment 3

[0030] A preparation method of a titanium-based hydrogen storage alloy, characterized in that the preparation method comprises the following steps: (1) vacuuming the intermediate frequency melting furnace, and introducing argon gas when the vacuum degree reaches 0.1-1Pa. (2) Press La 0.2 PR 0.5 Ca 0.8 Ti 1.9 Ni 0.5 co 1.1 Perform batching, and put the prepared alloy raw materials into the furnace body of step (1). (3) After the alloy raw material in step (2) in the furnace is energized and melted, add argon gas into the furnace again to make the pressure reach 800 Pa, and stabilize the temperature of the melt at 1350°C. (4) Pour the melt of step (3) into a pressure casting holding furnace filled with nitrogen for heat preservation, and then pour the melt in the holding furnace into a water-cooled copper mold. Before pouring, the mold should be preheated to 400°C. A hydrogen storage alloy is obtained. (5) Under an inert atmosphere, first heat the hydrogen storage alloy o...

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PUM

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Abstract

The invention discloses a manufacture method for a ti-based hydrogen storage alloy. The crystallization structure of the alloy changes through component adjustment of a ti-based hydrogen storage alloy, thermal treatment technique and a ball-milling technique, and an obtained product has the characteristic that the total component ratio of an AB2 structure and an A5B19 structure is above 35%. Especially, during a thermal treatment process, firstly stress relief annealing is performed, and then quenching and tempering are performed, so that uniformity of the ti-based hydrogen storage alloy is obviously improved, and thus a largest discharge capacity and improvement of a hydrogen storage capacity are ensured. Secondly, the crushed alloy is ball-milled for two timely separately by adopting a large ball and a small ball in the ball-milling technique, so that the hydrogen absorption / releasing capacity retention ratio of the powder product is further improved, and the circulation life of the powder product is further prolonged.

Description

technical field [0001] This patent relates to the field of alloy materials, specifically, it relates to a preparation method of a titanium-based hydrogen storage alloy. Background technique [0002] At present, the Chinese auto market is undergoing a transformation from traditional power vehicles to new energy vehicles. The mainstream new energy vehicle technology is based on electric vehicle technology, which can be divided into hybrid vehicles, pure electric vehicles and fuel cell vehicles. Among them, the hybrid electric vehicle is optimized and reformed on the basis of the traditional internal combustion locomotive, and the internal combustion engine technology and the electric motor technology are organically combined to make the vehicle meet people's requirements for fuel consumption and the environment. Hybrid vehicles rely heavily on advanced internal combustion engine technology. Pure electric vehicles get rid of the dependence on the advanced technology of tradit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C30/00C22C1/02C22F1/18C22F1/16B22F1/00
CPCB22F1/0003C22C1/02C22C14/00C22C30/00C22C2202/04C22F1/002C22F1/16C22F1/183
Inventor 王增琪
Owner 国工恒昌新材料(义乌)有限公司