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A kind of preparation method of bipolar zinc-ion battery

A zinc-ion battery, bipolar technology, applied in the direction of secondary batteries, circuits, electrical components, etc., can solve the problem of very high battery consistency, achieve the effect of reducing free electrolyte, improving adhesion ability, and increasing safety

Active Publication Date: 2019-02-05
江苏强劲新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the series connection has very high requirements on the consistency of batteries. At present, the safety and consistency of power batteries for electric vehicles have become a technical bottleneck in the development of electric vehicles.

Method used

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  • A kind of preparation method of bipolar zinc-ion battery
  • A kind of preparation method of bipolar zinc-ion battery
  • A kind of preparation method of bipolar zinc-ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Mix and stir graphite, epoxy resin, curing crosslinking agent and solvent according to the ratio of 2%, 4%, 0.8%, 93.2% (wt%) to form a conductive paste;

[0025] 2. Use a piece of 40um aluminum-copper composite foil as the bipolar current collector substrate 1, and evenly coat the conductive paste prepared in the previous step on the front and back sides of the bipolar current collector substrate 1 according to a certain surface density. Dry to form a 10um conductive layer 2 to obtain a bipolar current collector, wherein in the conductive layer 2, epoxy resin 12 is evenly coated on one side of the bipolar current collector substrate 1 to form a barrier film, and the graphite 11 is uniform distributed on the surface of the epoxy resin 12.

[0026] 3. Mix lithium manganate, carbon black, and binder in a solvent, stir to obtain a uniformly dispersed slurry, apply it to one side of the conductive layer 2, and dry it to obtain the positive electrode side 3; then zinc pow...

Embodiment 2

[0029] The difference between this embodiment and Example 1 is that when preparing the conductive paste, single-walled carbon nanotubes are used instead of graphite, phenolic resins are used instead of epoxy resins, and the ratio of curing crosslinking agent and solvent is 0.3%, 93.7% (wt%) ); and use 5um aluminum-nickel composite foil instead of 40um aluminum-copper composite foil to make bipolar current collector substrate 1, and the thickness of the formed conductive layer 2 is 0.2um; make the slurry that forms positive electrode side 3 and use manganese dioxide instead of manganese Lithium oxide and carbon fiber instead of carbon black; the slurry for forming the negative electrode side 4 is made of zinc powder coated with pyrolytic carbon instead of zinc powder, and a mixture of graphite and carbon black instead of carbon nanotubes.

Embodiment 3

[0031] The difference between this embodiment and Example 1 is that when preparing the conductive paste, graphite, carbon black, carbon nanotubes, single-walled carbon nanotubes, and carbon fibers are used instead of graphite, and polyurethane is used instead of epoxy resin, and the solidified cross-linked The ratio of coupling agent and solvent is 0.5%, 93.5% (wt%); and the bipolar current collector matrix 1 is made with 10um stainless steel foil instead of 40um aluminum-copper composite foil, and the thickness of the formed conductive layer 2 is 1um; The slurry on the negative electrode side 4 uses activated carbon instead of zinc powder.

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PUM

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Abstract

A method for preparing a bipolar zinc-ion battery. By uniformly coating a layer of conductive layer on the surface of a bipolar current collector substrate, resin can be used to form a layer of barrier film on the surface of the bipolar current collector substrate to prevent electrolysis. The short circuit occurs when the liquid penetrates; the conductive agent in the conductive layer can be evenly distributed on the surface of the bipolar current collector matrix, which not only increases the uniformity of the charge distribution on the surface of the bipolar current collector matrix, but also greatly reduces the positive / negative current. The contact resistance between the negative electrode side and the bipolar collector can improve the adhesion between the two and improve the performance of the battery; the diaphragm can be swelled by heating and pressing, and the binder can be cross-linked. The cold pressure gels the diaphragm to reduce the free electrolyte.

Description

technical field [0001] The invention relates to a preparation method of a bipolar zinc ion battery. Background technique [0002] Environmental pollution and oil shortage are problems faced by countries all over the world, and electric vehicles seem to be the perfect solution to these two problems - that is, they meet the rigid needs of people's daily travel without causing direct pollution to the environment. One of the key technologies for the development of electric vehicles is the power battery. Zinc-ion batteries have a series of advantages such as high energy density, high working voltage, long cycle life, and no memory effect, and have the potential to be used as power batteries for electric vehicles. In order to apply to electric vehicles, multiple power batteries need to be connected in series to ensure output power. However, the series connection has very high requirements on the consistency of the battery. At present, the safety and consistency of the power batt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/36H01M10/38
CPCH01M10/36H01M10/38Y02E60/10Y02P70/50
Inventor 王自强
Owner 江苏强劲新能源科技有限公司
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