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Alkaline capacitor battery iron electrode and preparation method thereof

A supercapacitor battery and iron electrode technology, which is applied in the direction of alkaline battery electrodes, battery electrodes, active material electrodes, etc., can solve the problems of low charging efficiency, low utilization rate of active materials, and poor high-rate discharge characteristics, etc., to achieve enhanced Good utilization rate, good consistency and good electrical performance

Inactive Publication Date: 2016-03-23
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problems of low active material utilization, low charging efficiency, and poor high-rate discharge characteristics in existing iron electrodes, and proposes a high-capacity, high-power iron electrode for alkaline supercapacitor batteries and its Preparation

Method used

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  • Alkaline capacitor battery iron electrode and preparation method thereof
  • Alkaline capacitor battery iron electrode and preparation method thereof

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Experimental program
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Effect test

preparation example Construction

[0039] The preparation steps of the first electrode material slurry are as follows:

[0040] Step 1: Put the adhesive in the above weight percentage in the mixing barrel of the mixer, add the pure water and stir evenly;

[0041] Step 2: Add the high specific surface carbon powder in the above weight percentage in stages, then add the conductive agent in the above weight percentage, stir for 0.5-1h, and then add the NiO or Ni(OH) in the above weight percentage 2 and metal sulfide, and then stirred for 0.5-1h;

[0042] Step 3: adding the electrochemically active substance in the above weight percentage in stages, and stirring for 2-4 hours after the addition, to obtain the first electrode material slurry.

[0043] As a preferred mode, the preparation method specifically includes the following steps:

[0044] Step 1: After the nickel foam is pre-pressed to about 80% of the initial thickness, a layer of high-temperature-resistant tape is symmetrically pasted on the front and bac...

Embodiment

[0064] Concrete formula and test performance (accounting for electrode material wt %) of each embodiment of table 1

[0065]

[0066]

[0067] From the above data, it can be concluded that the present invention can improve the battery specific capacity of the iron negative electrode by adding a certain amount of high specific surface carbon material to the iron electrode material, and at the same time make the iron electrode have a higher capacitive specific capacitance, In this way, it is possible to realize the "internal parallel" combination of capacitor and battery electrodes, so that nickel-iron, iron-air, silver-iron and other batteries made of iron negative electrodes have high energy density of batteries and high power density of supercapacitors.

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Abstract

The invention provides an alkaline super capacitor battery iron electrode, comprising a porous metal collector electrode substrate and an electrode material, wherein 85-95wt percent of the electrode material is an electrochemical active composite material, 5-15wt percent of the electrode material is formed by a conductive agent and a binder, and the electrochemical active composite material comprises an electrochemical active material and an additive. The invention also provides a preparation method of the alkaline super capacitor battery iron electrode; first electrode material slurry is subjected to filling and coating through an electrode plate slurry pulling automatic production line, and is prepared into the iron electrode by drying, prepressing, rolling, stamping and slicing, separating slices, and spot welding of electrode lugs. The iron electrode made by the preparation method disclosed by the invention is high in strength, good in electrical property, simple in manufacturing process, good in consistency and low in cost; a formula and the preparation method of the iron electrode are suitable for making iron cathodes of alkaline secondary batteries, such as a nickel-iron battery, an iron / air battery and a silver-iron battery, which are environment-friendly, with high capacity and high power, thus manufacturing corresponding super-batteries or super capacitor batteries.

Description

technical field [0001] The invention relates to the technical field of secondary batteries, in particular to the iron electrode composition and preparation technology of alkaline supercapacitor batteries, which are applied to the production of high-capacity, high-power environment-friendly nickel-iron batteries, iron / air batteries, and silver-iron batteries and other iron negative electrodes. Background technique [0002] The nickel-iron battery is a secondary battery that uses iron or iron compounds as the negative electrode active material, nickel hydroxide as the positive electrode active material, and potassium hydroxide (sodium) aqueous solution as the electrolyte. In the first half of the 20th century, nickel-iron batteries were widely used as power sources for traction locomotives. However, with the successful development and application of nickel-cadmium, nickel-hydrogen batteries and lithium-ion batteries with better performance, nickel-iron batteries were once used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/52H01M4/62H01M4/24H01M4/26
CPCH01M4/248H01M4/26H01M4/362H01M4/521H01M4/62H01M2004/027Y02E60/10
Inventor 吴孟强冯婷婷刘文龙文浪汪东霞
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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