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Zinc-nickel battery negative electrode active material, cable-stayed mesh negative electrode substrate, negative electrode and preparation method thereof

A negative electrode active material, zinc-nickel battery technology, applied in the direction of electrode manufacturing, battery electrodes, nickel storage batteries, etc., can solve the problems of increasing battery production cost and preparation difficulty, battery performance degradation, easy introduction of impurities, etc., to achieve inhibition of negative electrode deformation and Migration of negative electrode active material, low battery internal resistance, and the effect of avoiding failure

Active Publication Date: 2011-11-30
GUANGDONG POWERLINK ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the substrate is a copper alloy material. In order to avoid the degradation of battery performance caused by the corrosion of the negative electrode substrate due to hydrogen evolution, it is necessary to plate a layer of materials with high hydrogen evolution overpotential on the substrate surface, such as Zn, Sn, Ag, Pb, Bi or In. Plating these materials on the surface of the negative electrode substrate not only increases the production cost and difficulty of preparation of the battery, but also easily introduces impurities, which makes the hydrogen evolution phenomenon of the negative electrode more serious.

Method used

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  • Zinc-nickel battery negative electrode active material, cable-stayed mesh negative electrode substrate, negative electrode and preparation method thereof
  • Zinc-nickel battery negative electrode active material, cable-stayed mesh negative electrode substrate, negative electrode and preparation method thereof
  • Zinc-nickel battery negative electrode active material, cable-stayed mesh negative electrode substrate, negative electrode and preparation method thereof

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preparation example Construction

[0108] The present invention also provides a method for preparing a negative electrode of a zinc-nickel battery, comprising the following steps:

[0109] Al 2 o 3 pretreatment in the glue solution, the Al 2 o 3 Glue includes Al 2 o 3 , polyvinyl alcohol and water;

[0110] Coating the negative electrode active material composition described in the above technical solution on the pretreated negative electrode substrate, drying and rolling, and then shearing along the symmetry axis of the pretreated two sides of the negative electrode substrate to obtain a negative electrode semi-finished product ;

[0111] After immersing the symmetrical plane of the cut surface of the negative electrode semi-finished product in the glue solution to obtain the negative electrode of the zinc-nickel battery, the glue solution includes Al 2 o 3 , MgO, polyvinylidene fluoride emulsion, styrene-butadiene rubber emulsion, polyvinyl alcohol and water.

[0112] First, put the opposite sides of...

Embodiment 1

[0141] Example 1 Preparation of negative electrode active material slurry for zinc-nickel battery

[0142] First, heat the water bath to 60°C, add PVA and HPMC according to the mass ratio of water, PVA, and HPMC in a ratio of 93:4.5:2.5, and stir for 4 hours to obtain an adhesive;

[0143] Add 0.12g of nylon short fibers to 29g of binder, stir for 45min; continue to add 7.3g of Zn, stir for 15min; continue to add 5.91g of calcium hydroxide, zinc hydroxide and water with a mass ratio of 1:2:2, and stir for 3min; Continue to add 0.008gIn(OH) 2 , stirred for 30min; continue to add 1.35gBi 2 o 3 , stirred for 5min; continue to add 6.1g mass concentration of 60% polytetrafluoroethylene (PTFE) emulsion, stir for 5min; continue to add 0.0372g sodium dodecylbenzenesulfonate (SDBS), stir for 5min; continue to add 0.19gNa 2 HPO 4 , stirred for 5 min; finally, 50 g of ZnO was added, and after stirring for 1.5 h, a negative electrode active material composition slurry was obtained.

...

Embodiment 2

[0145] Example 2 Preparation of Negative Electrode Matrix

[0146] The first 0# zinc foil strip with a thickness of 0.05mm, the T2 pure copper foil strip with a thickness of 0.05mm and the second 0# zinc foil strip with a thickness of 0.05mm were subjected to oil storage, rust removal and drying treatment Finally, compound in a closed metal compound machine filled with nitrogen, and the compound temperature is 407°C to obtain a compound metal strip with the structure of the first zinc foil / copper foil / second zinc foil;

[0147] The composite metal strip is stamped and cut into a cable-stayed mesh metal strip through metal cutting and pulling equipment, and the surface density of the cable-stayed mesh metal strip is 300g / m 2 ;

[0148] The sides of the cable-stayed mesh metal strip with a width of 3mm on both sides are symmetrically bent, folded and flattened to obtain a cable-stayed mesh metal strip with protrusions; a strip with a width of 3mm, After a groove with a depth o...

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Abstract

The present invention provides a tilted-grid substrate of a negative electrode for a nickel-zinc battery, including a first zinc foil layer; a copper foil layer compounded on the first zinc foil layer; and a second zinc foil layer compounded on the copper foil layer. The present invention further provides an active material composition of a negative electrode for a nickel-zinc battery, a negative electrode for a nickel-zinc battery, the method for preparing the negative electrode, and a nickel-zinc battery. In the tilted-grid substrate of a negative electrode according to the present invention, the surface of zinc eliminates the needs for plating other metal, avoiding the incorporation of impurities. With the use of the nickel-zinc battery, part of the zinc on the surface of the tilted-grid substrate of the negative electrode can participate in the reaction of forming a current in the battery, reducing the fading speed of the battery capacity; and part of the zinc is oxidized to zinc oxide, acting as a conductor to improve the utilization ratio of the active material of the negative electrode. When the zinc layer on the surface of the substrate of the negative electrode participate in the reaction or is oxidized, the copper foil layer can act as the substrate of the negative electrode, so as to improve the performance of the nickel-zinc battery.

Description

technical field [0001] The invention belongs to the technical field of zinc-nickel batteries, and in particular relates to a zinc-nickel battery negative electrode active material, a cable-stayed mesh negative electrode substrate, a negative electrode and a preparation method thereof. Background technique [0002] With the prosperity and development of electric vehicles, electronic products and other industries, new electrochemical energy conversion and storage technologies and equipment, such as hydrogen storage materials and metal hydride nickel batteries, lithium-ion batteries, fuel cells, supercapacitors, etc. have been greatly developed. Compared with traditional batteries such as nickel-cadmium batteries and lead-acid batteries, zinc-nickel batteries have the advantages of high specific energy, high specific power, high open circuit voltage, wide operating temperature range, high current charging, and no environmental pollution. It has broad application prospects in fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/74H01M4/66H01M4/62H01M4/24H01M4/26H01M10/30
CPCH01M4/62H01M4/244H01M4/667H01M4/74H01M4/0404H01M4/72H01M10/30H01M4/661H01M4/622H01M4/66H01M4/24Y02E60/124H01M4/26Y02E60/10
Inventor 黎瑞灵
Owner GUANGDONG POWERLINK ENERGY
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