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A kind of hydrogen storage electrode alloy of power battery and preparation method thereof

A technology for electrode alloys and power batteries, which is applied in the field of hydrogen storage alloy materials, can solve the problems that the electrochemical performance is difficult to meet the requirements of Ni/MH batteries, and cannot meet the practical requirements of the performance stability of hydrogen storage alloys. Excellent cycle stability, improved electrochemical cycle stability, and strong anti-powdering ability

Active Publication Date: 2015-09-02
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it still cannot meet the practical requirements of hydrogen storage alloys for performance stability
Obviously, it is difficult to meet the requirements of Ni / MH batteries for hydrogen storage alloy materials only by optimizing the electrochemical properties of the alloy.

Method used

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  • A kind of hydrogen storage electrode alloy of power battery and preparation method thereof
  • A kind of hydrogen storage electrode alloy of power battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] refer to figure 1 , the metal raw material La that is weighed according to the chemical formula composition 0.72 Ce 0.1 Mg 0.18 Ni 3.4 al 0.1 Put it in the magnesia crucible of the intermediate frequency induction furnace, then cover the furnace cover, and evacuate to a vacuum degree of 4.5×10 -2 Pa, then fill in the mixed gas of argon + helium to reach the negative pressure of 0.04MPa, control the temperature at about 1450°C, adjust the power to melt all the metal, and become a molten liquid master alloy, keep it under the melting condition for 5 minutes, and then put the liquid alloy Inject into the tundish, and continuously spray it on the smooth surface of the water-cooled copper roller rotating at a line speed of 8m / s through the boron nitride nozzle at the bottom of the tundish to obtain fast-quenched alloy flakes; put the fast-quenched alloy into a vacuum heat treatment furnace , evacuated to 4.5×10 -3Pa, heated to 650°C for 4 hours, then cooled to room tem...

Embodiment 2-10

[0024] refer to figure 1 , the chemical composition and the ratio selection of specific embodiments of the present invention 2-10 are as follows:

Embodiment 2

[0025] Example 2: La 0.62 Ce 0.1 SM 0.1 Mg 0.18 Ni 3.4 al 0.1

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Abstract

The invention provides a power battery hydrogen storage electrode alloy and a preparation method of the power battery hydrogen storage electrode alloy. The power battery hydrogen storage electrode alloy is formed by low magnesium multi-rare-earth components, the chemical formula is RE1-xMgxNiyAlz, wherein 0.15<=x<=0.2, 3.3<=y<=3.8, and 0.05<=z<=0.15, and the rare earth elements (RE) are at least two elements selected from La, Ce, Sm, Y and Nd. The preparation method is that in inert gas shielding, induction heating smelting is adopted, melting alloy is poured into a tundish and sprayed on the surface of a water-cooling copper roller rotating at a certain speed through a nozzle at the bottom of the tundish to obtain rapid-quenching alloy, and then vacuum annealing is carried out in a vacuum heat treatment furnace. Combined action of the rare earth elements is fully used, the power battery hydrogen storage alloy is prepared by adoption of vacuum melting, the inert gas shielding and the rapid-quenching technology, electrochemical cycling stability of the alloy is improved, and the power battery hydrogen storage electrode alloy and the preparation method of the power battery hydrogen storage electrode alloy have the advantages that the technology is easy to master and suitable for mass production.

Description

technical field [0001] The invention relates to the technical field of hydrogen storage alloy materials, in particular to a power battery hydrogen storage electrode alloy composed of low-magnesium multi-rare earth components and a preparation method thereof. Background technique [0002] Since the advent of Ni-MH batteries in 1990, they have been widely used in various small portable electronic devices and are being developed as auxiliary power for commercial hybrid electric vehicles (HEV). A series of battery anode materials with excellent performance have been discovered, including rare earth-based AB 5 Type hydrogen storage alloy, AB 2 Type Laves phase hydrogen storage alloy, V-based solid solution hydrogen storage alloy and Mg 2 Ni type hydrogen storage alloy. Especially rare earth based AB 5 Type hydrogen storage alloys have been industrialized in China and Japan. However, rare earth based AB 5 The hydrogen storage capacity of the type alloy is low (about 330mAh / g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/38C22C19/03H01M4/24
CPCY02E60/124Y02E60/10
Inventor 张羊换郭世海林玉芳尚宏伟杨泰赵栋梁
Owner CENT IRON & STEEL RES INST
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