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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: 2015-06-24
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 a positive electrode electrolyte and a negative electrode electrolyte. That is, the first metal ions are confined in the positive electrode electrolyte, and the second metal ions are confined in the negative electrode electrolyte. In this way, the diaphragm can prevent the mutual contamination of the positive and negative electrolytes. Choose the electrolyte that is more suitable for the positive electrode or the negative electrode, but does not affect Ionic charge transfer. For example, an anion exchange membrane or a hydrogen ion exchange membrane is used as the diaphragm. The first metal ion located in the positive electrode electrolyte cannot pass through the diaphragm, so it cannot enter the negative electrode electrolyte and can only be restricted to the positive electrode electrolyte; the second metal ion located in the negative electrode electrolyte Metal ions cannot pass ...

Embodiment 1

[0083] Mix lithium manganate LMO, conductive agent graphite, binder SBR and CMC in water at a mass ratio of 90:5:2.5:2.5, and add lithium manganate LMO, conductive agent graphite, binder SBR and CMC with a total mass of 5% BHT, mixed to form a uniform positive electrode slurry. The positive electrode slurry was coated on both sides of a 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 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 50μm thick zinc foil is used as the negative electrode. The diaphragm is AGM glass fiber diaphragm. The size of the separator and the negative electrode are comparable to that of the positive electrode.

[0085] Weigh a certain mass of zinc sulfate and lithium sulfate, add them to water ...

Embodiment 2

[0088] Lithium manganate LMO, conductive agent graphite, binder SBR and CMC are mixed in water at a 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 a 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 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 50μm thick zinc foil is used as the negative electrode. The diaphragm is AGM glass fiber diaphragm. The size of the separator and the negative electrode are comparable to that of the positive electrode.

[0090] Weigh a certain mass of zinc methanesulfonate and lithium methanesulfonate, dissolve them in water, and then add BHT to configure the zinc methanesulfonate concentration to be 2mol / L, ...

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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, and specifically relates 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 start batteries, electric bicycles, and UPS. Although lead-acid batteries have a low cycle life and relatively low energy density, they have the advantages of very low price and high cost performance. Therefore, in recent years, nickel-hydrogen batteries, lithium-ion batteries, sodium-sulfur batteries, etc., have not been able to replace lead-acid batteries in the field of energy storage. [0003] A new battery based on internal ion exchange has appeared. The working principle of the battery is that the positive electrode is based on the extraction-intercalation reaction of the first metal ion, the negative electrode is based on the de...

Claims

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Application Information

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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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