Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

a single phase gd 2 co 7 Type rare earth magnesium-nickel hydrogen storage alloy, preparation method and application thereof

A technology of hydrogen storage alloy and rare earth magnesium, which is applied in the field of new energy materials, can solve the problems of low discharge capacity of hydrogen storage alloy, complex phase transition reaction of the alloy, and unreported preparation methods, etc., achieve excellent electrochemical discharge capacity, reduce heat Effect of uneven deformation and short cycle

Active Publication Date: 2020-01-24
包头中科轩达新能源科技有限公司
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, Gd 2 co 7 Type hydrogen storage alloys also have the disadvantages of low discharge capacity and poor cycle stability.
Although the addition of multiple elements can improve the performance of ordinary rare earth magnesium-nickel hydrogen storage alloys, however, Gd 2 co 7 The formation conditions of single-phase alloys are relatively harsh, and the phase transition reaction of the alloy becomes more complicated after doping with multiple elements, and the difficulty of synthesizing single-phase alloys is greatly increased.
At present, regarding the multi-element doped pure phase Gd 2 co 7 The preparation method of type rare earth magnesium-nickel hydrogen storage alloy has not been reported

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • a single phase gd <sub>2</sub> co <sub>7</sub> Type rare earth magnesium-nickel hydrogen storage alloy, preparation method and application thereof
  • a single phase gd <sub>2</sub> co <sub>7</sub> Type rare earth magnesium-nickel hydrogen storage alloy, preparation method and application thereof
  • a single phase gd <sub>2</sub> co <sub>7</sub> Type rare earth magnesium-nickel hydrogen storage alloy, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1 A single-phase Gd 2 co 7 Type rare earth magnesium-nickel hydrogen storage alloy and preparation method thereof

[0044] This embodiment prepares La 0.70 SM 0.15 Mg 0.15 Ni 3.30 al 0.15 Hydrogen storage alloy, the specific preparation steps are as follows:

[0045] (11) Induction melting

[0046] Select metal elemental La, Sm, Mg, Ni, Al as raw materials, according to the alloy composition La 0.70 SM 0.15 Mg 0.15 Ni 3.30 al 0.15 Carry out batching, supplement and increase according to the volatilization amount of corresponding element during batching, and then adopt conventional induction melting method to prepare as-cast alloy, denote as a1;

[0047] (12) Annealing treatment

[0048] Take a1 and place it in a vacuum annealing furnace. After sealing, the vacuum degree is 5×10 -3 Annealing treatment is carried out under Pa vacuum environment. The annealing process adopts a five-stage heating process. The specific annealing procedure is as follows:...

Embodiment 2

[0060] Example 2 A single-phase Gd 2 co 7 Type rare earth magnesium-nickel hydrogen storage alloy and preparation method thereof

[0061] This embodiment prepares La 0.65 SM 0.10 Nd 0.05 Mg 0.20 Ni 3.35 mn 0.05 Hydrogen storage alloy, the specific preparation steps are as follows:

[0062] (21) Induction melting

[0063] Select metal elemental La, Sm, Nd, Mg, Ni, Mn as raw materials, according to the alloy composition La 0.65 SM 0.10 Nd 0.05 Mg 0.20 Ni 3.35 mn 0.05 Carry out batching, supplement and increase according to the volatilization of corresponding element during batching, then adopt conventional induction melting method to prepare cast alloy, denote as a2;

[0064] (22) Annealing treatment

[0065] Take a2 and place it in a vacuum annealing furnace. After sealing, the vacuum degree is 5×10 -2 Annealing treatment is carried out under Pa vacuum environment. The annealing treatment is a five-stage heating process. The annealing procedure is as follows: ...

Embodiment 3

[0077] Example 3 A single-phase Gd 2 co 7 Type rare earth magnesium-nickel hydrogen storage alloy and preparation method thereof

[0078] This embodiment prepares La 0.65 SM 0.10 Y 0.05 Mg 0.20 Ni 3.20 al 0.20 Hydrogen storage alloy, the specific preparation steps are as follows:

[0079] (31) induction melting

[0080] Select metal elemental La, Sm, Y, Mg, Ni, Al as raw materials, according to the alloy composition La 0.65 SM 0.10 Y 0.05 Mg 0.20 Ni 3.2 0 al 0.20 Carry out batching, supplement and increase according to the volatilization of corresponding element during batching, then adopt conventional induction melting method to prepare cast alloy, denote as a3;

[0081] (32) Annealing treatment

[0082] Take a3 and place it in a vacuum annealing furnace. After sealing, the vacuum degree is 5×10 -4 Annealing is carried out under Pa vacuum environment, and described annealing program is as follows:

[0083] The first heating stage: from room temperature to 60...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention discloses a single-phase Gd2Co7-type rare earth-magnesium-nickel system hydrogen storage alloy. The composition of the alloy is La<1-x-y-z>Sm<x>M<y>Mg<z>Ni<l>N<k>, wherein the Mis the one element or two elements of Ce, Pr, Nd, Gd and Y, the N is one element of Al, Mn and Co, 0.05<=x<=0.30, 0<=y<=0.20, 0.10<=z<=0.25, 3.20<=l<=3.55, and 0.05<=k<=0.20. The present invention also provides a preparation method and applications of the hydrogen storage alloy. The hydrogen storage alloy is prepared through an induction melting process and an annealing process successively. The hydrogen storage alloy has the advantages of stable structure, uniform composition, complete crystal structure, uniform crystalline grain size, good electrochemical discharge capacity, good cycle stability and high rate discharge performance. The preparation method has the advantages of simplicity, easily controlled process and convenience for large-scale industrial production. The present invention can be applied to the preparation of the single-phase Gd2Co7-type rare earth-magnesium-nickel system hydrogen storage alloy, and further applied to a nickel hydrogen battery negative electrode material.

Description

technical field [0001] The invention belongs to the field of new energy materials, relates to a rare earth magnesium-nickel hydrogen storage alloy, a preparation method and its application, and particularly provides a single-phase Gd 2 co 7 Type rare earth magnesium-nickel hydrogen storage alloy, preparation method and application thereof. Background technique [0002] Nickel-metal hydride batteries have always occupied a large share of the secondary battery market due to their high energy density, fast charge and discharge, and long cycle life. In recent years, although lithium-ion batteries have developed rapidly due to their high energy density, nickel-metal hydride batteries still have great advantages in terms of safe use and low-temperature discharge. In order to improve the market competitiveness of Ni-MH batteries, it is urgent to research and develop anode materials for Ni-MH batteries with high capacity, high cycle stability and excellent low-temperature discharg...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/38H01M10/30
CPCH01M4/383H01M10/30Y02E60/10
Inventor 韩树民赵雨萌张璐
Owner 包头中科轩达新能源科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com