Electrochemical device and electronic equipment

An electrochemical and electrolyte technology, applied in electrochemical generators, electrolyte immobilization/gelation, circuits, etc., can solve problems such as poor physical contact, large grain boundary resistance, and poor interface stability

Active Publication Date: 2021-04-23
ZHUHAI COSMX BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the grain boundary resistance of the inorganic solid electrolyte itself is large, and the physical contact between the positive and negative electrodes is poor, which makes the interface stab

Method used

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  • Electrochemical device and electronic equipment
  • Electrochemical device and electronic equipment
  • Electrochemical device and electronic equipment

Examples

Experimental program
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Example Embodiment

[0084]The preparation of the positive electrode sheet and the negative electrode can be used in the preparation method commonly used in the art, and will not be described herein.

[0085]The lithium ion battery of the present invention can be assembled into a button battery, a mold battery or a soft bag battery.

[0086]Among them, the soft bag battery can be fabricated using a universal winding and laminated process, and a method of fabricating a softbell battery commonly used in the art can be employed. Specifically, the positive electrode sheet, the electrolyte, and the negative electrode sheet are sequentially laminated, and the laminating battery is vacuum to obtain a lithium ion battery of the laminated structure. The laminated positive electrode sheet, electrolyte, and negative electrode sheet are wound, and the wound cell is vacuum to obtain a lithium ion battery to be wound.

[0087]A second aspect of the present invention provides an electronic device, and the drive source and / or...

Example Embodiment

[0091]Example 1

[0092]1) Preparation of oxide electrolyte powder Li according to the traditional solid phase sintered method1.5Al0.5Ti1.5(Po4)3And fully dry, spare;

[0093]2) Put the dried electrolyte powder into the mold and pressurized into a sheet, then sintered at 900 ° C for 6 h, then cooled with the inorganic solid electrolyte layer, the inorganic solid electrolyte layer has a thickness of 100 μm;

[0094]3) Lithium methyl methacrylate (MMA), hexafluorophosphate (LIPF6), Vinyl carbonate (EC), ethylene glycol dimethyl ether (DME), peroxide is mixed according to the mass ratio of 8: 10: 45: 40: 2, and mix well at a rotational speed of 600 rpm, resulting near Positive electrode side electrolyte precursor;

[0095]4) in Li1.5Al0.5Ti1.5(Po4)3A proximal electrolyte precursor obtained in a surface coating step 3 of the inorganic solid electrolyte layer, covering the preparation of lithium iron phosphate positive electrode sheets on a proximal electrolyte precursor plate, at 80 ° C, initiating...

Example Embodiment

[0100]Example 2

[0101]1) Oxide electrolyte powder for commercial purchases Li3xLa2 / 3-xTIO3(x = 0.11) is fully dry, spare;

[0102]2) Put the dried electrolyte powder into the mold to press the sheet shape, then sintered at 950 ° C for 4 h, followed by cooling the inorganic solid electrolyte layer, the inorganic solid electrolyte layer has a thickness of 315 μm;

[0103]3) Pellettenediol tetracrylate, 4,5-dicano-2-trifluoromethylimidazol lithium (LIDTI), diethyl carbonate (DEC), azo diisobutyronitron according to 6:15:88: 1 The mass ratio is mixed, and stirred evenly at a rotational speed of 400 rpm to obtain a proximal electrolyte precursor;

[0104]4) in Li3xLa2 / 3-xTIO3(x = 0.11) A surface coating step 3 of the inorganic solid electrolyte layer, a proximal electrolyte precursor, which will be prepared.0.5CO0.3Mn0.2O2The positive electrode sheet is covered with a proximal electrolyte precursor, which initiates a near-positive electrode side electrolyte precursor 5H at 60 ° C, and the thicknes...

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Abstract

The invention provides an electrochemical device and electronic equipment. The electrochemical device comprises an electrolyte layer, a positive electrode layer and a negative electrode layer, the electrolyte layer comprises a near-positive-electrode-side electrolyte layer, an intermediate electrolyte layer and a near-negative-electrode-side electrolyte layer which are sequentially stacked, the electrolyte layer is arranged between the positive electrode layer and the negative electrode layer, the near-positive-electrode-side electrolyte layer is close to the positive electrode layer, and the near-negative-electrode-side electrolyte layer is close to the negative electrode layer; the near-positive-electrode-side electrolyte layer and the near-negative-electrode-side electrolyte layer are polymer electrolyte layers; the positive electrode layer comprises a positive electrode electrolyte skeleton and a positive electrode active layer filling the positive electrode electrolyte skeleton, and the composition of the positive electrode electrolyte skeleton is the same as that of the near positive electrode side electrolyte layer; and the intermediate electrolyte layer is an inorganic solid electrolyte layer. The electrochemical device is high in mechanical property, the physical contact between the electrolyte layer and the electrode layer is good, the interface stability is good, and the lithium ion transmission capacity and the cycling stability are high.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to an electrochemical device and electronic equipment. Background technique [0002] In recent years, among various commercial rechargeable and dischargeable chemical energy storage devices, lithium-ion batteries have attracted much attention since they were put into the market due to their high energy density and long service life. fields are widely used. However, lithium-ion batteries using organic electrolytes have potential safety hazards of flammability and explosion. [0003] Although the solid electrolyte in the solid electrolyte lithium-ion battery has high mechanical strength and a certain ability to resist the growth of lithium dendrites, it can improve the flammable and explosive safety hazards of lithium-ion batteries using organic electrolytes. However, the grain boundary resistance of the inorganic solid electrolyte itself is large, and the physical contact between...

Claims

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Application Information

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IPC IPC(8): H01M10/0565H01M10/0525
CPCH01M10/0525H01M10/0565H01M2300/0085Y02E60/10
Inventor 张赵帅赵伟李素丽
Owner ZHUHAI COSMX BATTERY CO LTD
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