Battery

A battery and electrolyte technology, which is applied in secondary batteries, circuits, secondary battery repair/maintenance, etc., can solve problems such as limiting batteries and battery electrochemical performance deterioration, to improve corrosion problems, improve self-discharge problems, and suppress The effect of oxygen free radicals

Active Publication Date: 2017-05-03
POSITEC POWER TOOLS (SUZHOU) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, at present, the self-discharge problem of this type of battery is relatively serious, which will lead to rapid deterioration of the electrochemical performance of the battery and limit the practical application of this type of battery. Therefore, it is urgent to find a new ion exchange battery that can improve the self-discharge problem of the battery.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0079] In a preferred embodiment, the separator is a separator that separates the electrolyte into positive electrolyte and negative electrolyte. That is, the first metal ion is confined in the positive electrolyte, and the second metal ion is confined in the negative electrolyte, so that the diaphragm can prevent the mutual contamination of the positive and negative electrolytes, and the electrolyte that is more suitable for the positive or negative can be selected, but it does not affect Ionic charge transfer. For example, using an anion exchange membrane or a hydrogen ion exchange membrane as a diaphragm, the first metal ion in the positive electrolyte cannot pass through the diaphragm, so it cannot enter the negative electrolyte and can only be limited to the positive electrolyte; the second metal ion in the negative electrolyte Metal ions cannot pass through the diaphragm, so they cannot enter the positive electrolyte, and can only be confined in the negative electrolyte....

Embodiment 1

[0083] Mix lithium manganate LMO, conductive agent graphite, binder SBR and CMC in water according to the mass ratio of 90:5:2.5:2.5, add lithium manganate LMO, conductive agent graphite, binder SBR and CMC total mass 5% of BHT, mixed to form a homogeneous cathode slurry. The positive electrode slurry was coated on both sides of the positive electrode current collector (50 μm stainless steel wire mesh) coated with a conductive film to form an active material layer, which was then pressed into sheets and cut into a size of 8×10 cm to make a positive electrode. The thickness of the positive electrode sheet is 0.4mm, and the surface density of the positive electrode active material is 750g / m 2 .

[0084] A zinc foil with a thickness of 50 μm was used as the negative electrode. The diaphragm is an AGM glass fiber diaphragm. The separator and negative electrode are comparable in size to the positive electrode.

[0085] Weigh a certain mass of zinc sulfate and lithium sulfate, a...

Embodiment 2

[0088] Lithium manganese oxide LMO, conductive agent graphite, binder SBR and CMC are mixed in water according to the mass ratio of 90:5:2.5:2.5 to form a uniform positive electrode slurry. The positive electrode slurry was coated on both sides of the positive electrode current collector (50 μm stainless steel wire mesh) coated with a conductive film to form an active material layer, which was then pressed into sheets and cut into a size of 8×10 cm to make a positive electrode. The thickness of the positive electrode sheet is 0.4mm, and the surface density of the positive electrode active material is 750g / m 2 .

[0089] A zinc foil with a thickness of 50 μm was used as the negative electrode. The diaphragm is an AGM glass fiber diaphragm. The separator and negative electrode are comparable in size to the positive electrode.

[0090] Weigh a certain amount of zinc methanesulfonate and lithium methanesulfonate, dissolve them in water, and then add BHT to configure zinc methan...

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Abstract

The invention provides a battery comprising a cathode, an anode, and an electrolyte solution. According to the battery, the cathode comprises a cathode active material capable of realizing reversible deintercalation-intercalation into first metal ions, and a cathode conductive agent; the electrolyte solution comprises a solvent capable of dissolving and ionizing electrolytes; the electrolytes comprise the first metal ions and second metal ions; in charging and discharging processes, the second metal ions can be transformed into a second metal via reduction and be deposited on the anode, and the second metal can be reversibly transformed into the second metal ions via oxidation dissolving; the battery also comprises an additive which is added into at least one of the cathode or the electrolyte solution; and the additive is a non-reduced type anti-oxidant. The battery is capable of avoiding corrosion caused by the conductive agent in the battery cathode, improving a problem of battery self-discharging further, and improving battery electrochemical performance.

Description

technical field [0001] The invention belongs to the field of batteries, in particular to a battery based on internal ion exchange. Background technique [0002] Lead-acid batteries, which have been around for more than a hundred years, have mature battery technology and occupy an absolute market share in energy storage fields such as car starter batteries, electric bicycles, and UPS. Although the lead-acid battery has a low cycle life and a relatively low energy density, it has the advantages of very low price and high cost performance. Therefore, in recent years, nickel-metal hydride batteries, lithium-ion batteries, sodium-sulfur batteries, etc., cannot replace lead-acid batteries in the field of energy storage. [0003] A battery based on internal ion exchange has emerged. The working principle of the battery is that the positive electrode is based on the extraction-intercalation reaction of the first metal ion, and the negative electrode is based on the deposition-diss...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/36H01M10/42
CPCH01M10/36H01M10/42Y02E60/10
Inventor 刘洋陈璞
Owner POSITEC POWER TOOLS (SUZHOU) CO LTD
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