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Dual-ion battery and preparation method thereof

A dual-ion, battery technology, applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, circuits, etc., can solve problems such as affecting safety, reduce the risk of fire, avoid dendrites, and have abundant reserves.

Inactive Publication Date: 2020-02-21
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a double-ion battery and its preparation method, aiming to solve the technical problem that the existing secondary battery cannot avoid the generation of metal dendrites, thereby affecting its safety

Method used

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  • Dual-ion battery and preparation method thereof
  • Dual-ion battery and preparation method thereof
  • Dual-ion battery and preparation method thereof

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preparation example Construction

[0030] On the other hand, the embodiment of the present invention also provides a method for preparing a dual-ion battery, comprising the following steps:

[0031] S01: According to the composition of the above-mentioned dual-ion battery of the embodiment of the present invention, provide the positive electrode, negative electrode, diaphragm and electrolyte in the dual-ion battery;

[0032] S02: Assemble the positive electrode, negative electrode, separator and electrolyte to obtain the dual-ion battery.

[0033] The preparation method of the dual-ion battery provided by the embodiment of the present invention uses organic cations and organic anions to form an ionic liquid as an electrolyte, and assembles it with a positive electrode, a negative electrode, and a separator. The process is simple and safe, and the electrode reaction of the final dual-ion battery is It does not involve any metal reaction, so there will be no problem of metal dendrites, and the generation of dendr...

Embodiment 1

[0042] A metal-ion-free dual-ion battery, the schematic diagram of which is shown in figure 1 As shown (the housing is not shown), the dual-ion battery includes a positive electrode current collector 1, a positive electrode active material layer 2, an electrolyte solution 3, a separator 4, a negative electrode active layer 5, and a negative electrode current collector 6.

[0043] The preparation method of the dual-ion battery provided in this embodiment comprises the following steps:

[0044] Step (1): Prepare the positive electrode: add 0.8g of expanded graphite, 0.1g of carbon black, and 0.1g of polyvinylidene fluoride to 2ml of nitrogen-methylpyrrolidone solution, grind thoroughly to obtain a uniform slurry; then evenly coat the slurry on Aluminum foil (i.e. positive current collector) surface and vacuum dried. The electrode sheet obtained by drying was cut into a disc with a diameter of 10 mm, and was used as a positive electrode after compaction.

[0045] Step (2): Prep...

Embodiment 2

[0050] A metal-ion-free dual-ion battery, except that the electrolyte is the ionic liquid BPyTFSI, the other materials, structure and preparation method of the dual-ion battery are the same as in Example 1.

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Abstract

The invention belongs to the technical field of batteries, and particularly relates to a double-ion battery and a preparation method thereof. The double-ion battery comprises a positive electrode, a negative electrode, a diaphragm and an electrolyte, wherein the diaphragm and the electrolyte are located between the positive electrode and the negative electrode; the electrolyte is an ionic liquid,the ionic liquid is composed of organic cations and organic anions, and no metal ions exist in the electrolyte. The electrolyte in the double-ion battery is ionic liquid composed of organic cations and organic anions. In this way, no metal reaction is involved in the electrode reaction; therefore, the problem of metal dendrites is avoided; according to the double-ion battery, dendrites can be prevented from being generated from the source, so that the safety of the battery is realized in principle, meanwhile, the double-ion battery uses the non-flammable ionic liquid as the electrolyte, the risk of ignition is reduced, and the safety of the battery is further improved compared with a traditional electrolyte based on a low-boiling-point organic solvent.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a dual-ion battery and a preparation method thereof. Background technique [0002] Rechargeable lithium-ion batteries have become the most successful commercial secondary batteries due to their high energy density, long cycle life and good stability. However, the scarcity of lithium resources and the continuous growth of people's demand for lithium-ion batteries mean that It is unreliable to rely entirely on lithium-ion batteries for large-scale energy storage systems. Concerns over the scarcity of lithium resources have sparked a great deal of research on batteries based on other abundant and inexpensive metal-ions, such as sodium-ion, potassium-ion, magnesium-ion, aluminum-ion, and calcium-ion batteries. In conclusion, the development of secondary batteries based on other metal ions is the current mainstream research direction in the field of energy storage. How...

Claims

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Application Information

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IPC IPC(8): H01M10/05H01M10/058
CPCH01M10/05H01M10/058H01M2300/0025H01M2300/0091Y02E60/10Y02P70/50
Inventor 唐永炳张苗周小燕
Owner SHENZHEN INST OF ADVANCED TECH
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