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Battery

A battery and electrolyte technology, applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of limiting battery and battery electrochemical performance deterioration, so as to improve self-discharge problem, increase capacity recovery rate, improve electrochemical performance and The effect of safety performance

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 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

[0088] 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

[0092] Mix 0.9g of silica sol (the content of silicon dioxide is 0.225g) and 30g of ethanol evenly, then add 20g of lithium manganate LMO and 2.25g of graphite conductive agent, impregnate at 60°C for 16 hours, then dry at 10°C, The positive electrode powder is obtained, and the positive electrode is prepared by using the positive electrode powder.

[0093] A zinc foil with a thickness of 50 μm was used as the negative electrode. The diaphragm is an AGM glass fiber diaphragm, and the size of the diaphragm and negative electrode is equivalent to that of the positive electrode.

[0094] 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.

[0095] The positive electrode, the negative electrode and the diaphragm are laminated and assembled into a battery cell, which is put into the casing, and then the electr...

Embodiment 2

[0097] The difference from Example 1 is that the amount of silica sol added is 1.8 g, that is, the added silicon dioxide is 0.45 g. The obtained battery is 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 silicon dioxide additive. 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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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62
CPCY02E60/10
Inventor 王静陈璞
Owner POSITEC POWER TOOLS (SUZHOU) CO LTD
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