Method for improving electrochemical properties of hydrogen storage alloy powder by using polyaniline

A hydrogen storage alloy, electrochemical technology, applied in the direction of circuits, electrical components, battery electrodes, etc., can solve the problems of strong molecular bonds, poor rigidity and strong interaction, difficult to melt processing, difficult to achieve alloy performance, etc., to achieve low production cost, The operation process and process are simple, and the effect of simple mechanical filtration and recovery treatment

Inactive Publication Date: 2010-06-09
YANSHAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the strong rigidity of the molecular bonds combined with polyaniline and the alloy body and the strong interaction between the bonds, it is difficult to achieve the effect of improving the properties of the alloy by simple addition.
At the same time, polyaniline is almost insoluble in any common organic solvent, does not melt at the decomposition temperature, and is difficult to melt process

Method used

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  • Method for improving electrochemical properties of hydrogen storage alloy powder by using polyaniline
  • Method for improving electrochemical properties of hydrogen storage alloy powder by using polyaniline
  • Method for improving electrochemical properties of hydrogen storage alloy powder by using polyaniline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1) Prepare 100g containing aniline 0.5mol / l, sulfuric acid 2×10 -3 mol / l mixed solution;

[0017] 2) Add 20g AB to the aforementioned mixed solution 5 type (MlNi 4.19 mn 0.31 co 0.42 al 0.23 ) hydrogen storage alloy powder;

[0018] 3) Stirring for 8 minutes under the condition of 120 rpm in the air;

[0019] 4) The treated alloy powder was characterized by Fourier transform infrared spectroscopy and field emission scanning electron microscopy, the results are shown in the attached figure 1 with figure 2 , as can be seen in the figure: in the Fourier Transform Infrared Spectrum, the characteristic peaks of benzoquinone (N=Q=N) and carbon-carbon double bond (C=C) of polyaniline appearing in the alloy after treatment are 1168cm -1 、3200cm -1 , it can be found in the field emission scanning electron microscope that coral-like polyaniline is formed on the surface of the alloy. The treated alloy powder is made into the negative electrode of the hydrogen storage el...

Embodiment 2

[0021] 1) Prepare 100g containing aniline 0.3mol / l, sulfuric acid 3×10 -3 mol / l mixed solution;

[0022] 2) Add 30g AB to the aforementioned mixed solution 5 type (MlNi 3.67 mn 0.25 co 0.50 al 0.28 ) hydrogen storage alloy powder;

[0023] 3) Stirring for 10 minutes at a speed of 150 rpm in air;

[0024] 4) The treated alloy powder was characterized by Fourier transform infrared spectroscopy and field emission scanning electron microscopy. The experimental results showed that: in the Fourier transform infrared spectrum, the treated alloy appeared benzoquinone (N=Q=N), carbon Carbon double bond (C=C) characteristic peak is 1163cm -1 、3195cm -1 , it can be found in the field emission scanning electron microscope that coral-like polyaniline is formed on the surface of the alloy. The treated alloy powder was made into an electrode for electrochemical testing, and the experimental conditions were the same as in Example 1. The experimental results show that the number of a...

Embodiment 3

[0026] 1) Prepare 100g containing aniline 0.5mol / l, sulfuric acid 4×10 -3 mol / l mixed solution;

[0027] 2) Add 50gAB to the aforementioned mixed solution 3 Type (La 0.88 Mg 0.12 Ni 2.95 mn 0.10 co 0.55 al 0.10 ) hydrogen storage alloy powder;

[0028] 3) Stirring for 15 minutes at a speed of 200 rpm in air;

[0029] 4) The treated alloy powder was characterized by Fourier transform infrared spectroscopy and field emission scanning electron microscopy. The experimental results showed that: in the Fourier transform infrared spectrum, the treated alloy appeared benzoquinone (N=Q=N), carbon Carbon double bond (C=C) characteristic peak is 1170cm -1 、3206cm -1, it can be found in the field emission scanning electron microscope that coral-like polyaniline is formed on the surface of the alloy. The treated alloy powder was made into an electrode for electrochemical testing, and the experimental conditions were the same as in Example 1. The experimental results show that t...

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Abstract

The invention provides a method for improving the electrochemical properties of hydrogen storage alloy powder by using polyaniline, which comprises the following steps of: soaking the hydrogen storage alloy powder to be treated in mixed solution of a certain proportion of aniline and sulfuric acid, and stirring the mixture; and by using the air as an oxidant and under the autocatalysis action of the polyaniline, performing attached oxidation on the surface of the hydrogen storage alloy powder to form a conductive polyaniline membranous layer. The method is suitable for AB2 type, AB3 type and AB5 type hydrogen storage alloys, and can significantly improve the hydrogen storage capacity, the activation property and the high-magnification discharge performance of the hydrogen storage alloys. The invention provides an effective method capable of being practically applied to the surface treatment of the hydrogen storage alloys, and the method has the advantages of simple treatment process, low raw material cost and the like.

Description

technical field [0001] The invention relates to a method for improving the electrochemical performance of the hydrogen storage alloy powder by directly polymerizing aniline on the surface of the hydrogen storage alloy powder to form a polymer film layer. The invention is related to the polyaniline film layer with high performance, and belongs to the technical field of hydrogen storage alloy surface treatment. Background technique [0002] Nickel metal hydride battery (MH-Ni battery) is a new type of high-performance, pollution-free secondary battery, which has the advantages of high energy density, long cycle life, and good environmental compatibility. MH-Ni batteries are widely used in electric vehicles (EV) including hybrid electric vehicles (HEV), various portable military electronic equipment and other fields. Finding ways to improve the performance of MH-Ni batteries has become the key to improving the market competitiveness of MH-Ni batteries and broadening their appl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38B22F1/00
CPCY02E60/12Y02E60/10
Inventor 韩树民沈文卓蒿建生刘治平李媛扈琳
Owner YANSHAN UNIV
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