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Flexible lithium ion battery and packaging method thereof

A lithium-ion battery, flexible battery technology, applied in battery electrodes, secondary batteries, battery pack components, etc., can solve problems such as the immaturity of flexible lithium-ion batteries, and achieve low cost of raw materials, high specific electric capacity, and high practicality. effect of value

Inactive Publication Date: 2012-07-04
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the research on flexible lithium-ion batteries with high performance and wide application is still immature, and the development of high-performance flexible lithium-ion batteries is an urgent problem to be solved at home and abroad.

Method used

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  • Flexible lithium ion battery and packaging method thereof
  • Flexible lithium ion battery and packaging method thereof
  • Flexible lithium ion battery and packaging method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0031] 1. To prepare battery electrode materials, cut the prepared zinc cobaltate / carbon cloth composite negative electrode material and lithium cobaltate positive electrode material into electrode sheets of the same area (3cm×5cm), and also cut out a diaphragm (Celgard2400). Connect the aluminum sheet tab to the positive electrode sheet, and connect the nickel sheet tab to the negative electrode sheet;

[0032] 2. Put the prepared aluminum-plastic film in the order of positive electrode sheet-diaphragm-negative electrode sheet, and then seal the three sides of the film with a sealing machine, leaving one side for subsequent infusion of 1.05mol / L LiPF 6 Electrolyte (of which LiPF 6 Soluble in a solution with a volume ratio of EC to DEC of 1:1);

[0033] 3. Put the entire aluminum-plastic film into the glove box, pour electrolyte into the unsealed side, put the aluminum-plastic film into a plastic bag, take it out from the glove box, and seal the unsealed side of the aluminum-...

Embodiment 1

[0038] The carbon cloth was ultrasonically cleaned in acetone, water, and ethanol in sequence, dried and cut into a uniform area (4cm×2cm), and a piece of carbon cloth was placed into the lining of the autoclave. Dissolve 1mmol of zinc nitrate, 2mmol of cobalt nitrate and 5mmol of urea in 35ml of deionized water, transfer to the lining of the high-pressure reactor with carbon cloth, screw the lid of the reactor and put it in a drying oven at 120°C for 5 hours. After the reaction, it was naturally cooled to room temperature, and the sample was taken out and calcined in a muffle furnace at 400 °C for 2 h.

Embodiment 2

[0040] The cleaning of the carbon cloth adopts the cleaning method in Example 1. Dissolve 1mmol of zinc nitrate, 2mmol of cobalt nitrate, 2mmol of ammonium fluoride and 5mmol of urea in 35ml of deionized water, transfer to the lining of the high-pressure reactor with carbon cloth, screw the lid of the reactor and put it in a drying oven at 120°C React in the box for 5 hours. After the reaction, cool down to room temperature naturally. The sample grown on the carbon cloth was calcined at 400°C for 2 hours in a muffle furnace to obtain a very uniform and orderly array of zinc cobaltate nanowires grown on the carbon cloth. Comparing Example 1, it can be seen that the addition of ammonium fluoride has a greater impact on the reaction system, and fluoride ions promote the growth of the sample on the carbon cloth substrate.

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Abstract

The invention provides a flexible lithium ion battery. The flexible lithium ion battery comprises a flexible battery case and a main battery body arranged inside the flexible battery case, electrolyte is filled in the flexible battery case, and the main battery body comprises a positive electrode plate, a diaphragm and a negative electrode plate which are stacked in sequence. The negative electrode plate is made from one of zinc cobaltate / carbon cloth composite negative electrode material, zinc oxide, tin oxide, ferric oxide and nickel oxide, and the positive electrode plate is made from one of lithium cobaltate, lithium iron phosphate and lithium manganate. The invention also provides a method for preparing the battery. In the invention, the problems that lithium ion batteries in prior arts have poor flexibility, relatively low capacitance, unsatisfactory circularity and poor electric stability are solved. The packaging of the battery is relatively simple, efficient and quick, most raw materials are low in cost, and the battery is suitable for popularization and has high practicability.

Description

technical field [0001] The invention belongs to the field of new generation energy storage, and in particular relates to the packaging and application of a high-performance flexible lithium-ion battery. Background technique [0002] Since the birth of lithium-ion batteries, it has attracted much attention. It is an internationally recognized ideal chemical energy source. It has many advantages such as large capacity, low self-discharge, and high platform voltage. It is quickly widely used in mobile phones, In fields such as DV, notebook computers and military equipment, the ever-expanding field of electric vehicles will bring more room for development of lithium-ion batteries. Throughout the development of science and technology, the miniaturization, lightness, portability and flexibility of optoelectronic devices are a leading future development trend. Some high-tech new products have also appeared one after another, such as flexible displays, flexible solar cells, transpa...

Claims

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Application Information

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IPC IPC(8): H01M10/0525H01M2/02H01M4/131H01M10/058
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 沈国震刘彬陈娣
Owner HUAZHONG UNIV OF SCI & TECH
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