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Composite material of conducting high polymers/alloy for nickel-hydrogen battery and preparation thereof

A conductive polymer and composite material technology, applied in the field of alloy composite materials for nickel-hydrogen batteries, can solve problems such as affecting the performance of alloy electrodes, poor cycle stability, alloy powdering, etc. Effect

Inactive Publication Date: 2008-10-22
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nickel-metal hydride batteries have certain requirements for the maximum discharge capacity of the alloy electrode and the stability of the charge-discharge cycle. Improving the charge-discharge performance of the alloy electrode is one of the research purposes of the alloy electrode material; During the discharge cycle, alloy powdering and corrosion are prone to occur, which affects the performance of alloy electrodes. This is also the purpose of research on alloy electrode materials.
[0003] AB used in the past 3 Alloy electrodes, although the discharge capacity is lower than industrially produced AB 5 Alloy electrodes have a large discharge capacity, but are limited by poor cycle stability and cannot really replace AB 5 Alloy electrodes, and used in large-scale industrial production

Method used

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  • Composite material of conducting high polymers/alloy for nickel-hydrogen battery and preparation thereof
  • Composite material of conducting high polymers/alloy for nickel-hydrogen battery and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Take 0.5ml of double-distilled aniline monomer and dissolve it in 10mL of deionized water, then add 2.6mL of 2mol / L hydrochloric acid, and after stirring for about 30min, add dropwise an aqueous solution of ammonium persulfate (2.56g of ammonium persulfate dissolved in 11mL of water ), the average rate of addition is 20drop / min, after all the dropwise addition, then stir and react for 12h, the product obtained is washed and filtered by methanol and water (polyaniline is washed with methanol to remove unreacted aniline monomer, polyaniline has better conductivity), baked in a vacuum oven at 60°C for 24 hours, and set aside.

[0029] AB 3Alloy according to La 0.7 Mg (0.3-x) Ti x Ni y co 3.5-y (x = 0.02 ~ 0.06, y = 2.9 ~ 3.2), put each metal into a high-temperature melting furnace, protect it with argon, heat up and smelt, repeat 3 times, and obtain evenly smelted AB 3 alloy, the AB 3 The alloy block is crushed, ground, passed through a 300-mesh sieve, and set aside...

Embodiment 2

[0039] The difference from Example 1 is that polypyrrole is prepared by injecting 1 mL of pyrrole monomer that has been distilled 4 times into 100 mL of an acidic aqueous solution of ammonium persulfate (ammonium persulfate is 3.12 g). The reaction was carried out under stirring for 12 hours, and the obtained product was washed and filtered with methanol and water (polypyrrole was washed with methanol to remove unreacted aniline monomer, polyaniline has better electrical conductivity), and baked in a vacuum oven at 60°C for 24 hours ,spare.

[0040] AB 3 Alloy according to La 0.7 Mg (0.3-x) Ti x Ni y co 3.5-y (x=0~0.02, y=3.3~3.5) proportioning, smelting preparation conditions are the same as embodiment 1. Will AB 3 The alloy block is smashed, ground, and passed through a 200-300 mesh sieve, and the intermediate product is taken for later use.

[0041] Take 1g of AB through 200-300 mesh sieve 3 The alloy is mixed with 0.01g of polypyrrole, put into an agate ball mill ...

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Abstract

The invention relates to conductive high molecular polymer / alloy composite material for nickel-hydrogen batteries and a preparation method thereof. The composite material is compositely formed by a metal AB3 alloy and a conductive high molecular polymer, and is a material that the conductive high molecular polymer is coated on the surface of the metal alloy; the mixture ratio of the metal AB3 alloy is La 0.7 Mg 0.3-x Ti x Ni y Co 3.5-y, wherein, x is equal to 0-0.15, and y is equal to 2.0-3.5; and the mass mixture ratio of the metal alloy and the conductive high molecular polymer is 100:1-4. The composite material can be prepared according to the following steps: 1) an organic monomer with conductivity is evoked by acid conditions and oxidant to polymerize to obtain the conductive high molecular polymer; 2) the metal alloy is prepared through a high-temperature smelting furnace, and then undergoes ball milling with the conductive high molecular polymer to obtain the even composite material. The preparation method has simple process and low cost, and can effectively improve the stability of charge / discharge circulation of alloy electrodes by compounding the conductive high molecular polymer and the metal alloy, thereby providing effective protection for alloy electrodes. The material is suitable for applications such as the protection of electrode materials, fuel batteries and so on.

Description

technical field [0001] The invention relates to alloy composite materials for nickel-hydrogen batteries, in particular to a conductive high-molecular polymer / alloy composite material for nickel-hydrogen batteries and its preparation, which combines conductive high-molecular polymers with improved electrode cycle stability and metal alloys Composite preparation of new composite materials for nickel metal hydride batteries. Background technique [0002] As a kind of electrode materials, metal alloys are widely used in the field of fuel cells. The typical application of this material is on nickel-metal hydride batteries. The reaction on the positive and negative electrodes of nickel-hydrogen batteries belongs to the solid-state transition mechanism. The electrode material itself does not involve any dissolution and deposition processes, while metal hydride electrodes only involve hydrogen atoms. The transfer and electrochemical reaction lead to a higher utilization rate of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/02C08L79/04C08L65/00C08K3/08H01B1/22H01M4/32H01M4/26
CPCY02E60/124Y02E60/10
Inventor 徐芬齐燕妮孙立贤杨黎妮张箭邱树君张耀
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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