Battery

A battery and electrolyte technology, applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of limiting the battery and the deterioration of the electrochemical performance of the battery, etc., to improve the cycle performance, improve the floating charge problem and self-discharge problem, improve the battery Effects of chemical properties and safety properties

Inactive Publication Date: 2016-02-17
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 a rapid deterioration of the electrochemical performance of the battery, which limits the practical application of this type of battery. Therefore, it is urgent to find a new ion exchange battery that can improve the float charge problem and self-discharge problem

Method used

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Examples

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Embodiment approach

[0086] 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

[0090] Lithium manganate LMO, graphite conductive agent SFG-6, and binder PVDF were mixed in water at a mass ratio of 86:7:7 to form a uniform positive electrode slurry. The positive electrode slurry is coated on the positive electrode current collector to form an active material layer, which is then pressed into tablets.

[0091] Zinc foil was used as the negative electrode, and AFG film was used as the separator.

[0092] Weigh a certain mass of zinc sulfate and lithium sulfate, add them to dissolve in water, and configure an electrolyte solution with a concentration of zinc sulfate of 2 mol / L and a concentration of lithium sulfate of 1 mol / L.

[0093] Assemble the positive electrode, negative electrode and diaphragm into a battery cell, put it into the case, then inject electrolyte, seal it, and assemble it into a button battery with a capacity of 0.7mAh to 1.2mAh, which is designated as S1.

Embodiment 2

[0095] The difference from Example 1 is: Weigh a certain amount of zinc methanesulfonate and lithium methanesulfonate, add them to dissolve in water, and configure the concentration of zinc methanesulfonate to be 2mol / L, and the concentration of lithium methanesulfonate to be 2mol / L. It is 3mol / L electrolyte. Assemble into a button battery with a capacity of 0.7mAh to 1.2mAh, denoted as S2.

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Abstract

The invention provides a battery. The battery comprises 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 of first metal ions; the electrolyte solution comprises a solvent capable of dissolving and ionizing electrolytes; the electrolyte solution comprises 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; wherein, the cathode also comprises a graphite conductive agent SFG. The battery is capable of improving a problem of battery self-discharging, 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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IPC IPC(8): H01M4/62
CPCY02E60/10
Inventor 刘洋陈璞
Owner POSITEC POWER TOOLS (SUZHOU) CO LTD
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