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Superlattice Sm-Mg-Ni multiphase alloy, preparation method and application of superlattice Sm-Mg-Ni multiphase alloy as well as nickel-metal hydride battery

A nickel-metal hydride battery and superlattice technology, applied in battery electrodes, alkaline battery electrodes, circuits, etc., can solve the problems of comprehensive hydrogen storage performance, low hydrogen storage capacity of base alloy, and long time consumption, etc., to achieve good activation Effects of performance and cycle life, low activity, and low cost

Active Publication Date: 2014-10-01
深圳市德力普电池科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to break through the traditional LaNi 5 The low hydrogen storage capacity and high cost of base alloys and other deficiencies; also in order to overcome the problems in the prior art such as long time-consuming, high cost and comprehensive hydrogen storage performance of the La-Mg-Ni superlattice alloy preparation method, the present invention Provided is a superlattice Sm–Mg–Ni alloy, its preparation method and application, and a nickel-metal hydride battery. The new superlattice alloy system has the advantages of simple preparation method and excellent comprehensive hydrogen storage performance.

Method used

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  • Superlattice Sm-Mg-Ni multiphase alloy, preparation method and application of superlattice Sm-Mg-Ni multiphase alloy as well as nickel-metal hydride battery
  • Superlattice Sm-Mg-Ni multiphase alloy, preparation method and application of superlattice Sm-Mg-Ni multiphase alloy as well as nickel-metal hydride battery
  • Superlattice Sm-Mg-Ni multiphase alloy, preparation method and application of superlattice Sm-Mg-Ni multiphase alloy as well as nickel-metal hydride battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The total weight of the smelted alloy is 30 grams, according to 54wt% Sm 3 MgNi 14 +46wt%Sm 4 MgNi 19 The target composition ratios were weighed Sm flakes (purity 99%, 3 wt% more burn loss for Sm), Mg flakes (99.5% purity, 10 wt% more burn loss for Mg) and Ni flakes (99% purity ). Put the weighed Sm, Mg and Ni sheets into a copper crucible and induction melting at 18KW power to obtain a Sm–Mg–Ni ternary alloy. The alloy phase composition is as follows: figure 1 As shown in (a) in the alloy, it is clear that AB is present in the alloy 2 , AB 3 , A 2 B 7 , A 5 B 19 and AB 5 types, etc. Use a grinder to remove the oxide scale on the surface of the smelted alloy, and then grind it into a 300-mesh alloy powder in a glove box filled with inert gas protection. Tablets were pressed under an argon atmosphere. Then, the green sample was sealed in a stainless steel container filled with inert gas and annealed in a common vacuum annealing furnace for 2 hours at a tempe...

Embodiment 2

[0048] The total weight of the smelted alloy is 30 grams, according to 46wt% Sm 3 MgNi 14 +54wt%Sm 4 MgNi 19 The target composition ratios were weighed Sm flakes (purity 99%, 3 wt% more burn loss for Sm), Mg flakes (99.5% purity, 10 wt% more burn loss for Mg) and Ni flakes (99% purity ). Put the weighed Sm, Mg and Ni sheets into a copper crucible and induction melting at 18KW power to obtain a Sm–Mg–Ni ternary alloy. The alloy phase composition is as follows: figure 1 As shown in (c) in the alloy, it is clear that AB is present in the alloy 2 , AB 3 , A 2 B 7 , A 5 B 19 and AB 5 types, etc. The oxide scale on the surface of the smelted alloy was removed with a grinder, and then ground into a 260-mesh alloy powder in a glove box filled with inert gas protection. Then, the green sample was sealed in a stainless steel container filled with inert gas and annealed in a common vacuum annealing furnace for 4 hours at a temperature of 850°C. The phase composition of the an...

Embodiment 3

[0050] Same as Example 1, the difference is that according to 50wt% Sm 3 MgNi 14 +50wt%Sm 4 MgNi 19 The target composition ratio was weighed respectively for Sm flakes (purity 99.6%, with 5 wt% more burn loss added to Sm), Mg flakes (purity of 99%, 16 wt% more burn loss added to Mg, the specific burn loss is and adopts The crucible, the induction furnace are related to the preparation parameters, and this burning loss can be calculated by the equipment used by those skilled in the art, which will not be repeated here) and Ni sheets; the as-cast alloy is ground into 200 mesh alloy powder; green annealing 3 hours, the annealing temperature is 810℃, such as figure 2 (c), after annealing, only 50 wt% Sm was obtained. 3 MgNi 14 and 50wt% Sm 4 MgNi 19 Phase superlattice hydrogen storage alloy (it should be noted that in this application document, since the unavoidable impurity has little influence on the experimental results, it is not considered as an object); Image 6 (a)...

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Abstract

The invention discloses a superlattice Sm-Mg-Ni multiphase alloy, a preparation method and an application of the superlattice Sm-Mg-Ni multiphase alloy as well as a nickel-metal hydride battery and belongs to the technical field of hydrogen storage material. The Sm-Mg-Ni alloy provided by the invention comprises A2B7 type Sm3MgNi14 and an A5B19 type Sm4MgNi19 superlattice phase. The preparation method comprises the following steps of preparing a cast Sm-Mg-Ni multiphase alloy from Sm, Mg and Ni as raw materials by virtue of a high-frequency induction melting method; grinding the cast alloy into powder, uniformly mixing the cast phase and sheeting; and then heating the sheeted sample to a certain temperature and sintering to obtain the superlattice Sm-Mg-Ni multiphase alloy. Superlattice Sm-Mg-Ni multiphase alloy provided by the invention has the characteristics of large hydrogen storage capacity, fast hydrogen absorption and release rate, good reversible hydrogen storage property and the like at room temperature and two drawbacks of relatively high cost and low hydrogen storage capacity of the traditional LaNi5-based hydrogen storage alloy are effectively broken.

Description

technical field [0001] The invention belongs to the technical field of hydrogen storage materials, in particular to a novel hydrogen storage alloy and a preparation method thereof, and more particularly to a superlattice Sm-Mg-Ni multiphase alloy and a preparation method thereof And applications and nickel-hydrogen batteries, the alloy material is mainly used for the negative electrode material of nickel-hydrogen batteries. Background technique [0002] As anode materials for NiMH batteries, La–Mg–Ni alloys with superlattice structure (including AB 3 , A 2 B 7 , and A 5 B 19 and other types), the hydrogen storage capacity is higher than that of the practical AB 5 type alloys, so in the past ten years, this type of alloys has been widely studied [Y.Liu, Y.Gao, Li.Huang, M.Gao and H.Pan, J.Alloys Compd., 509(2011), 675 ]. Although these alloys have high hydrogen storage capacity, they still have the following deficiencies in practical applications: (1) the activation of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/03C22F1/10H01M4/24H01M4/38
CPCY02E60/124Y02E60/10
Inventor 陈子亮宫秀勉
Owner 深圳市德力普电池科技有限公司
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