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Method for preparing anode of high-power nickel-hydrogen battery

A nickel-metal hydride battery, high-power technology, applied in the field of electrochemistry, can solve the problems of poor conductivity of the positive electrode, slow initial activation of the battery, etc., to achieve the effect of reducing the internal resistance of the battery, shortening the activation cycle, and improving the consistency of the battery

Inactive Publication Date: 2011-11-30
QUANZHOU JINTION ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for preparing a positive electrode of a high-power nickel-metal hydride battery, the purpose of which is to overcome the defects in the prior art such as poor conductivity of the positive electrode and slow initial activation of the battery.

Method used

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Examples

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Effect test

Embodiment 1

[0024] The positive electrode preparation method of high-power nickel-hydrogen battery, first weigh 50kg powdery α-Ni(OH) 2 and put it into a stirring tank, and add 500g nanoscale ZnO powder (the particle size of nanoscale ZnO is usually between 5nm-100nm between), turn on the stirring function, and stir at a constant speed for 2 hours.

[0025] After the stirring is completed, pour out the mixed powder and place it in the VC750 ultrasonic disperser of SONICS & MATERAIALS Company of the United States for ultrasonic dispersion and vibration. The dispersion and vibration time is 30 minutes. The dispersed mixed powder is filled into foamed nickel by physical filling method. substrate, and then the current collector is spot-welded to the nickel foam substrate above to complete the fabrication of the positive electrode.

Embodiment 2

[0027] Weigh 30kg powdery β-Ni(OH) 2, put into a stirring tank, and add 500g nanoscale ZnO powder and 1000g nanoscale Co powder (the particle diameters of nanoscale ZnO and nanoscale Co are usually between 5nm-100nm time), turn on the stirring function, and stir at a constant speed for 1 hour.

[0028] After the stirring is completed, the mixed powder is poured out and placed in the VC750 ultrasonic disperser of SONICS & MATERAIALS Company of the United States for ultrasonic dispersion. The dispersion time is 20 minutes. The dispersed mixed powder is filled into the nickel foam matrix by physical filling. Then, the current collector is spot-welded to the above-mentioned nickel foam substrate to complete the fabrication of the positive electrode.

Embodiment 3

[0030] This embodiment is a preferred embodiment, the positive electrode preparation method of high-power nickel-hydrogen battery, first weigh 20kg of nickel hydroxide, put it into a stirring tank, and add 700g of nano-scale NiO powder, 1000g of nano-scale cobalt oxide powder and 300g of nano-scale Zn powder (nano-ZnO, nano-Co and nano-NiO usually have a particle size between 5nm-100nm), turn on the stirring function, and stir at a constant speed for 6 hours.

[0031] After the stirring is completed, the mixed powder is poured out and placed in the VC750 ultrasonic disperser of SONICS & MATERAIALS Company of the United States for ultrasonic dispersion. The dispersion time is 60 minutes. The dispersed mixed powder is filled into the nickel foam matrix by physical filling. Then, the current collector is spot-welded to the above-mentioned nickel foam substrate to complete the fabrication of the positive electrode.

[0032] In addition, the active material can also be a mixture of...

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Abstract

The invention discloses a method for preparing the anode of a high-power nickel-hydrogen battery. The method comprises the following steps: a) weighing a fixed quantity of an active substance; b) adding a defined amount of nanometer-scale conductive agent to the active substance, mixing and stirring the nanometer-scale conductive agent and the active substance to form a powder mixture; c) placing the powder mixture into an ultrasonic dispersion machine for ultrasonic vibration so that the nanometer-scale conductive agent is uniformly absorbed on the surface of the active substance; d) filling the powder mixture onto a foam nickel substrate in a physical filling manner; and e) spot-welding current collectors on the foam nickel substrate to finally obtain the anode. The nanometer-scale conductive agent is added to anode material, thereby reducing the internal resistance of the battery, efficiently promoting the conducting efficiency of an anode, promoting the high-power discharging property of the battery, shortening the activating period of the battery and improving the consistency of the battery.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to a method for preparing a positive electrode of a high-power nickel-hydrogen battery that can improve the electrical conductivity of the positive electrode and shorten the battery activation cycle. Background technique [0002] As the world's environmental problems have attracted more and more attention from people, higher requirements have been put forward for environmental protection. Therefore, nickel-metal hydride batteries with high specific energy, high specific power, long life, no memory effect, no pollution, and green energy have become Today's fast growing secondary batteries. Countries around the world are increasingly interested in non-emission pollution-powered vehicles, which provides a broad prospect for the development of nickel-metal hydride high-power batteries. However, at present, Ni-MH high-power batteries still have some problems such as low high-power discha...

Claims

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Application Information

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IPC IPC(8): H01M4/26
CPCY02E60/124Y02E60/10
Inventor 陈端典陈文明李培坤张桂生尹纯
Owner QUANZHOU JINTION ELECTRONICS
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