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Magnesium-based hydrogen storage alloy prepared by ball milling method

A magnesium-based hydrogen storage alloy, ball milling technology, applied in structural parts, electrical components, battery electrodes, etc., can solve the problems of poor electrochemical cycle stability, poor reaction kinetics, slow hydrogen absorption/desorption rate, etc. , to achieve the improvement of hydrogen absorption/desorption capacity retention rate and cycle life, good comprehensive performance effect, and improved power output characteristics

Active Publication Date: 2019-11-29
上海中海龙高新技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing magnesium-based hydrogen storage alloys have poor electrochemical cycle stability, poor reaction kinetics, slow hydrogen absorption / desorption rate and high hydrogen release temperature, which limit the commercialization of magnesium-based hydrogen storage alloys. 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

[0024] A magnesium-based hydrogen storage alloy prepared by ball milling, characterized in that the magnesium-based hydrogen storage alloy is prepared by microwave smelting, heat treatment, and ball milling processes, specifically as follows: (1) Vacuum the microwave vacuum sintering furnace, when the vacuum degree When it reaches 0.1~1Pa, argon gas is introduced, and the pressure in the furnace is controlled to be 0.08~0.10MPa; (2) according to La 0.3 Nd 0.5 Zr 0.5 Mg 2.2 Ni 0.5 co 1.7 Carry out batching, put the alloy raw material of preparing material into the furnace body of step (1); (3) under the microwave power of 4KW, after the alloy raw material of step (2) in the furnace is heated and melted, feed supplementary argon into the furnace again gas to make the pressure reach 800Pa, and stabilize the temperature of the melt at 1000°C; (4) pour the melt in step (3) into a pressure casting holding furnace filled with nitrogen to keep it warm, and then put the melt in the...

Embodiment 2

[0026] A magnesium-based hydrogen storage alloy prepared by ball milling, characterized in that the magnesium-based hydrogen storage alloy is prepared by microwave smelting, heat treatment, and ball milling processes, specifically as follows: (1) Vacuum the microwave vacuum sintering furnace, when the vacuum degree When it reaches 0.1~1Pa, argon gas is introduced, and the pressure in the furnace is controlled to be 0.08~0.10MPa; (2) according to La0.5 Nd 0.5 Zr 0.8 Mg 2.8 Ni 1.3 co 2 Carry out batching, put the alloy raw material of preparing material into the furnace body of step (1); (3) under the microwave power of 4KW, after the alloy raw material of step (2) in the furnace is heated and melted, feed supplementary argon into the furnace again gas to make the pressure reach 500Pa, and stabilize the temperature of the melt at 1350°C; (4) pour the melt in step (3) into a pressure casting holding furnace filled with nitrogen to keep it warm, and then put the melt in the hol...

Embodiment 3

[0028] A magnesium-based hydrogen storage alloy prepared by ball milling, characterized in that the magnesium-based hydrogen storage alloy is prepared by microwave smelting, heat treatment, and ball milling processes, specifically as follows: (1) Vacuum the microwave vacuum sintering furnace, when the vacuum degree When it reaches 0.1~1Pa, argon gas is introduced, and the pressure in the furnace is controlled to be 0.08~0.10MPa; (2) according to La 0.2 Nd 0.5 Zr 1.2 Mg 2.1 Ni 0.5 co 0.9 Carry out batching, put the alloy raw material of preparing material into the furnace body of step (1); (3) under the microwave power of 4KW, after the alloy raw material of step (2) in the furnace is heated and melted, feed supplementary argon into the furnace again gas to make the pressure reach 600Pa, and stabilize the temperature of the melt at 1300°C; (4) pour the melt in step (3) into a pressure casting holding furnace filled with nitrogen for heat preservation, and then put the melt ...

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Abstract

By means of the process of components adjustment, microwave smelting, heat treatment and ball milling of a magnesium-based hydrogen storing alloy, the crystalline structure of the alloy is made to change, and an obtained finished product has the characteristic that the sum of the component ratios of an AB2 structure and an A5B19 structure is 40% or above. In order to make the magnesium-based hydrogen storing alloy have larger discharging capacity and hydrogen storing capacity than existing products, the heat treatment process of two times of quenching and two times of tempering is adopted, anda good comprehensive performance effect is acquired. According to the ball milling process, large and small balls are adopted for perform ball milling on the smashed alloy twice in sequence, along with uniform micronization of the magnesium-based hydrogen storing alloy, the surface area is made increased, when the magnesium-based hydrogen storing alloy is applied to a nickel-hydrogen storage battery, the electric power output characteristic of the magnesium-based hydrogen storing alloy is obviously improved, and especially, the hydrogen absorbing / releasing capacity retention rate and the cycle service life of a product are further improved.

Description

technical field [0001] This patent relates to the field of alloy materials, specifically, it relates to a magnesium-based hydrogen storage alloy prepared by ball milling. Background technique [0002] At present, with the rapid development of society and increasing market demand, the manufacturing technology of nickel-metal hydride batteries and hydrogen storage alloys has become more and more perfect. The characteristics have become a very important technical index for its successful application in various fields, which is also the development direction of the next generation of hydrogen storage alloys. This is of great significance to the rapid growth of my country's new energy vehicle industry, especially to the promotion and popularization of electric vehicles in the cold northern regions. According to the statistics of the National Energy Administration, the domestic production and sales of new energy vehicles in 2016 were 517,000 and 507,000 respectively, ranking firs...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/03C22C23/00B22F9/04H01M4/38
CPCB22F9/04C22C1/03C22C23/00H01M4/383Y02E60/10
Inventor 蒋红
Owner 上海中海龙高新技术研究院
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