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AB5 type hydrogen storage alloy used for nickel-metal hydride battery and preparation method of hydrogen storage alloy

A hydrogen storage alloy and nickel-metal hydride battery technology, applied in the direction of nickel storage battery, battery electrode, alkaline storage battery, etc., can solve the problems of high cost, battery short circuit, etc., and achieve the effect of low cost, low cost and high performance

Inactive Publication Date: 2018-03-13
SIHUI DABOWEN IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem that cobalt, praseodymium and neodymium are commonly used in the hydrogen storage alloys in the prior art, resulting in high cost, while copper and iron are prone to produce dendrites during the cycle process, resulting in a short circuit of the battery, and provide a discharge capacity and cycle AB for nickel-metal hydride batteries with low cost and no cobalt, praseodymium, neodymium, copper and iron, whose life meets the requirements of nickel-hydrogen batteries 5 Type hydrogen storage alloy and preparation method thereof

Method used

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  • AB5 type hydrogen storage alloy used for nickel-metal hydride battery and preparation method of hydrogen storage alloy
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  • AB5 type hydrogen storage alloy used for nickel-metal hydride battery and preparation method of hydrogen storage alloy

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Experimental program
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Effect test

Embodiment 1

[0018] According to the structural formula La 0.793 Ce 0.160 Y 0.040 Zr 0.007 Ni 4.810 mn 0.640 Al 0.240 Weigh the metal raw materials La, Ce, Y, Zr, Ni, Mn, Al, place them in the crucible of the induction melting furnace, vacuumize (1Pa) and fill it with argon gas. The pressure in the furnace is 0.1MPa. Smelting at 1300°C for 2.5 hours to obtain metal smelting liquid; pour the metal smelting liquid into a water-cooled ingot mold and cool to obtain an alloy ingot. Place the alloy ingot in a horizontal heat treatment furnace, vacuumize (1Pa) and fill it with protective gas argon, the pressure in the furnace is 0.1MPa, anneal at 1100°C for 14h, and get AB for nickel-metal hydride batteries after crushing 5 type hydrogen storage alloy.

Embodiment 2

[0020] According to the structural formula La 0.845 Ce 0.150 Zr 0.005 Ni 4.500 mn 0.650 Al 0.400 Weigh the metal raw materials La, Ce, Zr, Ni, Mn, Al, put them in the crucible of the induction melting furnace, vacuumize (5Pa) and fill it with argon gas. The pressure in the furnace is 0.01MPa. Smelting for 1.0 h to obtain a molten metal; pouring the molten metal into a water-cooled ingot mold and cooling to obtain an alloy ingot. Put the alloy ingot in a horizontal heat treatment furnace, vacuumize (5Pa), fill it with protective gas argon, the pressure in the furnace is 0.01MPa, anneal at 1200°C for 5h, and get AB for nickel-metal hydride batteries after crushing. 5 type hydrogen storage alloy.

Embodiment 3

[0022] According to the structural formula La 0.740 Ce 0.250 Zr 0.010 Ni 4.620 mn 0.630 Al 0.200 Weigh the metal raw materials La, Ce, Zr, Ni, Mn, Al, put them in the crucible of the induction melting furnace, vacuumize (20Pa) and fill it with argon gas. The pressure in the furnace is 0.5MPa. Smelting for 3 hours to obtain a metal smelting solution; pouring the metal smelting solution into a water-cooled ingot mold and cooling to obtain an alloy ingot. Place the alloy ingot in a horizontal heat treatment furnace, vacuumize (20Pa) and fill it with protective gas argon, the pressure in the furnace is 0.05MPa, anneal at 1000°C for 15h, and obtain AB after crushing 5 Hydrogen storage alloys for Ni-MH batteries.

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Abstract

The invention discloses an AB5 type hydrogen storage alloy used for a nickel-metal hydride battery and a preparation method of the hydrogen storage alloy. The hydrogen storage alloy has the structuralgeneral formula of Ml<1-x>Zr<x>Ni<z>M<y>, wherein Ml is at least one kind of La, Ce and Y; M is at least one kind of Mn and Al; x is greater than or equal to 0.005 and less than or equal to 0.05; z is greater than or equal to 4.3 and less than or equal to 5.0; and z+y is greater than 5.1 and less than 5.9. The raw materials of metal lanthanum, cerium, yttrium, zirconium, nickel, manganese, aluminum and the like are weighed according to the structural general formula (Ml<1-x>Zr<x>Ni<z>M<y>) to be subjected to induction smelting; the alloy components are strictly controlled, and proper annealing is performed to prepare the low-cost and high-performance AB5 type hydrogen storage alloy used for the nickel-metal hydride battery; and the prepared AB5 type hydrogen storage alloy used for the nickel-metal hydride battery does not contain expensive cobalt, praseodymium and neodymium, and copper and iron which form dendritic crystal easily, so that the hydrogen storage alloy has the advantagesof low cost, high discharge capacity, long cycle life and the like.

Description

Technical field: [0001] The invention belongs to the technical field of batteries and battery hydrogen storage materials, and in particular relates to an AB for nickel-hydrogen batteries. 5 Type hydrogen storage alloy and its preparation method. Background technique: [0002] Hydrogen storage materials are the basis for the development of hydrogen storage technology. Since the late 1960s, LaNi 5 Since it was found to have good hydrogen storage properties, LaNi 5 Type hydrogen storage alloys have been commercialized for many years and are still the main hydrogen storage materials. But traditional LaNi 5 Type hydrogen storage alloys are difficult to meet the requirements in terms of cycle performance, and studies have shown that element substitution can improve their cycle stability. AB 5 The A side of the type hydrogen storage alloy is mostly replaced by rare earth elements such as Ce, Pr, and Nd, and the B side is mostly replaced by elements such as Co, Mn, and Al. The...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M10/30C22C19/03
CPCC22C19/03H01M4/364H01M4/385H01M10/30Y02E60/10
Inventor 闵德罗统钊何崇杰刘丽英
Owner SIHUI DABOWEN IND CO LTD
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