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Flexible thin film cell

A flexible thin film and battery technology, applied in primary batteries, dry batteries, equipment for manufacturing primary batteries, etc., can solve the problems of reduced battery capacity, reduced battery performance, and easy formation of wrinkles

Inactive Publication Date: 2019-02-15
ZINERGY SHENZHEN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But one of the downsides of current flexible batteries is the tendency for creases to form at the bends due to the elastic properties of different materials.
The formation of wrinkles not only affects the aesthetics of the battery, but also tends to separate the positive and negative electrodes of the battery at the location of the wrinkles, which reduces the capacity of the battery
In addition, the stress generated at the location of the wrinkles will also cause the active material to fall off during the bending process of the battery, resulting in a decrease in battery performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0167] according to Figure 4 The roll-to-roll printing production schematic diagram, the flexible thin film battery is prepared by printing from the inside to the outside; the printing process needs to be dried before printing the next layer; that is, the positive electrode layer is printed, and after drying, the printed carbon layer is used as the positive electrode current collector. After drying, a negative electrode layer is printed, and after drying, a carbon layer is printed as a negative electrode current collector.

[0168] The separator is cellulose paper; the thickness is 40 μm;

[0169] The thickness of the positive electrode layer is 100 μm; the composition of the positive electrode slurry is shown in Table 1;

[0170] The thickness of the negative electrode layer is 50 μm; the composition of the negative electrode slurry is shown in Table 1;

[0171] The positive current collector layer is a carbon layer with a thickness of 20 μm;

[0172] The negative electro...

Embodiment 2

[0177] A flexible thin-film battery was prepared according to the method of Example 1. The separator used a 30um thick PDVF film with a void rate of 80%. The materials and thicknesses of other layers were the same, and 8μm SiO was printed between the separator and the positive electrode layer 2 as a ceramic layer.

[0178] The performance of the flexible film battery obtained in Example 2 is detected, and the electrolyte is 2M ammonium chloride and 2M zinc chloride solution; the battery capacity of 1.45mAh / cm is detected 2 , after bending 1000 times, the battery voltage remains at 1.5V, and the detection capacity is 1.45mAh / cm 2 .

Embodiment 3

[0179] Example 3 Series flexible thin film battery

[0180] Preparation of 3V output Zn / MnO 2 Battery. Zn / MnO 2 The battery has the advantages of safety and environmental protection, but its low voltage output limits its application. The driving voltage of conventional integrated circuit chips is 3V. The Zn / MnO2 battery with 3V output can be easily prepared through the method disclosed in the invention. like Figure 4 As shown, printing unit 1 was prepared by roll-to-roll printing: positive and negative electrodes (50 μm) and collector carbon layer (20 μm) were printed on the separator layer (40 μm cellulose paper) up and down. It should be noted that the carbon layer current collector on the positive electrode can be printed thinner to reduce the production cost of the battery, and also reduce the overall thickness of the battery. Its thickness can be controlled at 1 to 5 μm. The printed battery unit 2 was prepared in the same way; the type and thickness of the separato...

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Abstract

The invention provides a flexible thin film cell which comprises a diaphragm, wherein a positive layer is printed on one side of the diaphragm; and a negative layer is printed on the other side of thediaphragm. Compared with the prior art, the flexible thin film cell provided by the invention has the benefits that the positive layer and the negative layer are directly printed on the two sides ofthe diaphragm to form a compact three-layer structure, so that a positive electrode and a negative electrode of the cell form an overall cell layer with the diaphragm, therefore, the phenomenon of separation at a curved fold can be avoided, and the bending resistance of the flexible thin film cell is improved.

Description

technical field [0001] The invention belongs to the technical field of thin film batteries, in particular to a flexible thin film battery. Background technique [0002] Compared with traditional batteries, flexible thin-film batteries can provide more design space and convenience for electronic devices, so their market demand is also increasing. [0003] Due to the flexibility of the thin film battery, it can be easily integrated with some flexible electronic devices without affecting the comfort of the device. For example, the shape of the film makes it suitable for smart medical patches, active radio frequency identification, smart packaging and wearable devices. There are broad application prospects in other fields. Therefore, the research on flexible thin film batteries has been paid more and more attention. [0004] The currently commonly used method of manufacturing flexible thin film batteries is to achieve thin film by improving the packaging material or reducing t...

Claims

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Application Information

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IPC IPC(8): H01M6/04H01M6/16H01M6/10H01M6/00
CPCH01M6/005H01M6/04H01M6/10H01M6/16
Inventor 郑富林聂赞相普里帖斯·希亚拉杜国庆
Owner ZINERGY SHENZHEN LTD
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