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Battery

A battery and electrolyte technology, applied in secondary batteries, lead-acid batteries, circuits, etc., can solve the problems of potential safety hazards in battery use, battery bulging, and battery performance deterioration, so as to avoid bulging and inhibit gas generation. , the effect of enhancing safety performance

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, after the battery is used for a period of time, a large amount of gas will be generated inside the battery, which will easily cause the battery to bulge, resulting in a safety hazard in the use of the battery; at the same time, due to the generation of gas, the performance of the battery will deteriorate rapidly

Method used

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Embodiment approach

[0064] In a preferred embodiment, the anions in the electrolyte include one or more of sulfate ions, chloride ions, acetate ions and nitrate ions.

[0065] The concentration of each ion in the electrolyte can be changed and adjusted according to different conditions such as different electrolytes, solvents, and battery application fields.

[0066] Preferably, in the electrolyte, the concentration of the first metal ion is 0.1-10 mol / L.

[0067] Preferably, in the electrolyte, the concentration of the second metal ion is 0.5-15 mol / L.

[0068] In order to optimize the performance of the battery, the pH range of the electrolyte is preferably 3-7.

[0069] The pH value of the electrolyte ranges from 3 to 7, which can effectively ensure the concentration of the second metal ion in the electrolyte, thereby ensuring the capacity and rate discharge performance of the battery, and can also avoid the problem of co-intercalation of protons.

[0070] The positive electrode of the prese...

Embodiment 11

[0123] 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 the positive electrode current collector (50 μm stainless steel plate) to form an active material layer, which was then pressed into sheets and cut into a size of 6cm×6cm to make positive electrode sheets.

[0124] 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.

[0125] Weigh a certain quality of lithium methanesulfonate and zinc methanesulfonate and dissolve them in deionized water, then add N-methylthiourea to make 2mol / L lithium methanesulfonate, 3mol / L zinc methanesulfonate, N-methylsulfonate The content of thiourea is 0.5wt% in the electrolyte.

[0126] The positive electrode, the ...

Embodiment 12

[0128] The difference from Example 1.1 is that tetramethylthiourea is used instead of N-methylthiourea, and the other parts are the same as in Example 1.1 to obtain a battery, which is designated as A2.

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Abstract

The invention discloses 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; 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 processes, the second metal ions are transformed into second metal via reduction, and the second metal is deposited on the anode; and in discharging processes, the second metal can be transformed into the second metal ions via reversible oxidation dissolving. The battery also comprises additives added into the electrolyte solution; and the additives comprise one or a plurality of compounds selected from Tween, tertiary amine compounds, heterocyclic quaternary ammonium salts, and thioamide. The battery is capable of inhibiting generation of gas effectively, so that battery expansion is avoided, and battery safety is improved.

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): H01M10/08
CPCH01M10/4235Y02E60/10
Inventor 刘洋陈璞
Owner POSITEC POWER TOOLS (SUZHOU) CO LTD
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