Vanadium-based hydrogen storage alloy as well as preparation method and application thereof

A hydrogen storage alloy, vanadium-based technology, applied in electrical components, battery electrodes, alkaline batteries, etc., can solve the problems of low discharge capacity, poor kinetic performance, high cost, etc., to increase discharge capacity and improve electrochemical kinetics performance effect

Active Publication Date: 2019-02-26
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the existing Ni-MH battery has low discharge capacity and poor kinetic performance, resulting in high cost

Method used

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  • Vanadium-based hydrogen storage alloy as well as preparation method and application thereof
  • Vanadium-based hydrogen storage alloy as well as preparation method and application thereof
  • Vanadium-based hydrogen storage alloy as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The chemical formula of the rare earth modified vanadium-based hydrogen storage alloy is V 2 TiNi 0.5 Cr 0.5 Mx, where M is La, x=0.02-0.15.

[0027] The specific manufacturing method is to weigh V, Ti, Ni, Cr and La particles or powders according to the stoichiometric ratio, put them into a vacuum non-consumable arc melting furnace, and evacuate to 10 -3 After Pa, melt the alloy, take it out after water cooling. The smelted alloy is put into a hydrogenation device, and hydrogen is repeatedly absorbed and released to prepare alloy powder for battery assembly.

[0028] Charge and discharge performance test: After mixing the hydrogen storage alloy powder and the nickel hydroxy powder in a ratio of 1:4, press it on the foamed nickel sheet under the pressure of 20MPa. ) 2 / NiOOH, Hg / HgO electrode as the reference electrode. The electrolyte is 7mol / L KOH solution, and the test environment temperature is kept at (303±0.5)K. The charge-discharge cycle performance test a...

Embodiment 2

[0030] The chemical formula of the rare earth-modified vanadium-based hydrogen storage alloy is V2TiNi0.5Cr0.5Mx, where M is Ce, and x=0-0.1.

[0031] The specific manufacturing method is to weigh V, Ti, Ni, Cr and Ce particles or powders according to the stoichiometric ratio, put them into a vacuum non-consumable arc melting furnace, and evacuate to 10 -3 After Pa, melt the alloy, take it out after water cooling. The smelted alloy is put into a hydrogenation device, and hydrogen is repeatedly absorbed and released to prepare alloy powder for battery assembly.

[0032] Charge and discharge performance test: After mixing the hydrogen storage alloy powder and the nickel hydroxy powder in a ratio of 1:4, press it on the foamed nickel sheet under the pressure of 20MPa. ) 2 / NiOOH, Hg / HgO electrode as the reference electrode. The electrolyte is 7mol / L KOH solution, and the test environment temperature is kept at (303±0.5)K. The charge-discharge cycle performance test adopts Wuh...

Embodiment 3

[0034] The chemical formula of the rare earth-modified vanadium-based hydrogen storage alloy is V2TiNi0.5Cr0.5Mx, where M is Y and x=0.02-0.08.

[0035] The specific manufacturing method is to weigh V, Ti, Ni, Cr and Y particles or powders according to the stoichiometric ratio, put them into a vacuum non-consumable arc melting furnace, and evacuate to 10 -3 After Pa, melt the alloy, take it out after water cooling. The smelted alloy is put into a hydrogenation device, and hydrogen is repeatedly absorbed and released to prepare alloy powder for battery assembly.

[0036] Charge and discharge performance test: After mixing the hydrogen storage alloy powder and the nickel hydroxy powder in a ratio of 1:4, press it on the foamed nickel sheet under the pressure of 20MPa. ) 2 / NiOOH, Hg / HgO electrode as the reference electrode. The electrolyte is 7mol / L KOH solution, and the test environment temperature is kept at (303±0.5)K. The charge-discharge cycle performance test adopts Wuha...

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Abstract

The invention discloses a vanadium-based hydrogen storage alloy, and belongs to the technical field of nickel-hydrogen battery development. The chemical formula of the alloy is V2TiNi0.5Cr0.5Mx, x islarger than 0 and smaller than or equal to 0.2, and M is at least one of La, Ce, Y, Sc, Nd, Gd, Er, and Yb. According to the alloy, the advantages and disadvantages of rare earth hydrogen storage alloy and vanadium-based hydrogen storage alloy are considered, V, Ti, Cr and Ni are used as matrix alloys, La, Ce, Y, Sc, Nd, Gd, Er and Yb in rare earth are used as modified metals, and after rare earthelements are introduced into the vanadium-based hydrogen storage alloy, on the one hand, the discharge capacity of the hydrogen storage alloy serving as a nickel-hydrogen battery anode material can be improved, and on the other hand, the electrochemical kinetics performance of the alloy electrode can be improved. The technical problems of low actual discharge capacity and insufficient kinetics performance of the existing nickel-hydrogen battery are solved.

Description

technical field [0001] The invention discloses a vanadium-based hydrogen storage alloy, a preparation method and application thereof, and belongs to the technical field of nickel-hydrogen battery development. Background technique [0002] Ni-MH battery is an alkaline rechargeable battery that has been vigorously researched and developed at home and abroad in recent years. It has high specific energy, no pollution to the environment, no memory effect, and good overcharge and overdischarge resistance characteristics. It is widely used in communication digital products, electric tools, etc. , instruments and toys and other fields are more and more widely used, Ni-MH batteries are divided into high-voltage Ni-MH batteries and low-voltage Ni-MH batteries. Ni-MH battery positive active material is Ni(OH) 2 (called NiO electrode), the negative active material is a metal hydride, also known as a hydrogen storage alloy (the electrode is called a hydrogen storage electrode). However...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38H01M10/30
CPCH01M4/383H01M10/30Y02E60/10
Inventor 同艳维崔旭梅张雪峰李娜丽邓刚王舟
Owner PANZHIHUA UNIV
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