Nickel-hydrogen battery discharging at low temperature and high multiplying power and preparation method and negative plate thereof

A technology for high-rate discharge and nickel-metal hydride batteries, which is applied in the manufacture of nickel batteries, alkaline battery electrodes, and alkaline batteries, and can solve problems such as limited electron conductivity on the surface of the negative electrode

Inactive Publication Date: 2010-09-29
SHENZHEN GREPOW BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is also limited to increase the nickel content from the alloy itself to improve the electron conductivity of the surface of the negative electrode.

Method used

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  • Nickel-hydrogen battery discharging at low temperature and high multiplying power and preparation method and negative plate thereof
  • Nickel-hydrogen battery discharging at low temperature and high multiplying power and preparation method and negative plate thereof
  • Nickel-hydrogen battery discharging at low temperature and high multiplying power and preparation method and negative plate thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A nickel-metal hydride battery, the negative plate uses the AB5 hydrogen storage alloy powder produced by Zhuhai Jinfenghang Power Technology Co., Ltd., and the product model is 6S. The surface of the hydrogen storage alloy powder is first plated with nickel by electroless nickel plating, the plating solution is nickel sulfate, the oxidizing agent is sodium hypophosphite, and the temperature of the plating solution is 85°C. Put the hydrogen storage alloy powder in the plating solution, perform electroless plating for 10 minutes, filter, wash with water, and vacuum dry to prepare the hydrogen storage alloy powder with a nickel content of 90-100% in the surface layer of 0.5-3 μm. The treated hydrogen storage alloy powder is used, the negative electrode conductive skeleton is made of nickel mesh, and the negative electrode sheet is made by dry powder coating. The nickel content within 0.5-3 μm of the negative electrode surface layer is 80-95%. The positive plate uses spher...

Embodiment 2

[0018] A nickel-metal hydride battery, the negative plate uses the AB5 hydrogen storage alloy powder produced by Zhuhai Jinfenghang Power Technology Co., Ltd., and the product model is 6S. The conductive skeleton of the negative electrode is made of nickel mesh, and the negative plate is made by dry powder coating. The electroless nickel plating method is used. The plating solution is nickel sulfate, the oxidizing agent is sodium hypophosphite, and the temperature of the plating solution is 85°C. Put the negative electrode sheet in the plating solution, perform electroless plating for 10 minutes, filter, wash with water, and dry in vacuum to prepare the negative electrode sheet with a nickel content of 85-100% in the surface layer of 0.5-3 μm. The positive plate uses spherical nickel hydroxide produced by Henan Xinfei Kelong Power Supply Co., Ltd., and cobaltous oxide produced by Loudihong Sun Power New Material Co., Ltd. The positive conductive framework uses foamed nickel, an...

Embodiment 3

[0020] A nickel-metal hydride battery, the negative plate uses the AB5 hydrogen storage alloy powder produced by Zhuhai Jinfenghang Power Technology Co., Ltd., and the product model is 6S. The negative electrode conductive skeleton uses nickel mesh, and the negative electrode sheet is made by dry method of powdering. The negative electrode sheet is placed in 30% KOH solution, the solution temperature is 80°C, the negative electrode sheet is soaked for 25 hours, washed with water, and dried to obtain the surface layer. Negative sheet with nickel content of 68-80% within 0.5-3μm. The positive plate uses spherical nickel hydroxide produced by Henan Xinfei Kelong Power Supply Co., Ltd., and cobaltous oxide produced by Loudihong Sun Power New Material Co., Ltd. The positive conductive framework uses foamed nickel, and the positive plate is made by semi-dry method of powdering . The electrolyte uses 30% KOH solution. Assembled into a battery.

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Abstract

The invention belongs to the technical field of nickel-hydrogen batteries and provides a nickel-hydrogen battery discharging at low temperature and high multiplying power and a preparation method and a negative plate thereof. The nickel-hydrogen battery negative plate comprises hydrogen storage alloy powder and a conductive framework to which the hydrogen storage alloy powder is attached. A nickel-rich layer is arranged on the surface of the negative plate, wherein the content of nickel is more than 65 percent. The nickel-hydrogen battery comprises a negative plate the surface of which the nickel-rich layer is arranged, wherein the content of nickel is more than 65 percent. The preparation method of the nickel-hydrogen battery comprises the steps of preparing the negative plate and forming the nickel-rich layer on the surface of the negative plate, wherein the content of nickel is more than 65 percent. In the invention, the activity of a nickel-hydrogen negative electrode is enhanced by increasing the nickel content of the negative surface layer, so that the nickel-hydrogen battery can discharge in a low-temperature environment. The preparation method is simple and convenient and easy to realize; compared with the discharge at 10 multiplying power at normal temperature, the discharge at 10 multiplying power at low temperature of 15 DEG C below zero is as high as over 95 percent; and in addition, a discharge curve is flat, the discharge voltage in over 75 percent of time is centralized in the range of 1-0.9V.

Description

technical field [0001] The invention relates to a nickel-hydrogen battery and a preparation method thereof, in particular to a low-temperature high-rate discharge nickel-hydrogen battery, a preparation method thereof and a negative electrode sheet. Background technique [0002] Nickel-cadmium batteries use cadmium oxide as the negative electrode material, which seriously pollutes the environment. As people pay more and more attention to environmental pollution, nickel-cadmium batteries will gradually withdraw from the market. Ni-MH batteries use hydrogen storage alloys as anode materials, which belong to green energy. Nickel-metal hydride batteries have gradually replaced nickel-cadmium batteries and are widely used in various fields. Compared with nickel-cadmium batteries, nickel-metal hydride batteries also have certain limitations. The hydrogen storage alloy of nickel-hydrogen battery has poor activity in low temperature environment, and the electronic conductivity of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/24H01M10/30H01M10/28H01M4/26
CPCY02E60/124Y02E60/10Y02P70/50
Inventor 刘淼贾红杰胡彦庆
Owner SHENZHEN GREPOW BATTERY CO LTD
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