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Full solid thin film lithium battery and its producing method

A lithium battery, all-solid-state technology, applied in the manufacture of secondary batteries, batteries with solid electrolytes, battery electrodes, etc., can solve the problems of low manufacturing cost, performance, physical state, cycle life, and high rate charge and discharge of thin film lithium batteries Poor performance and other problems, to achieve the effect of improving air resistance, increasing electrochemical reaction performance and efficiency, and high discharge voltage

Inactive Publication Date: 2007-04-11
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, thin-film lithium batteries using polymer technology have a slightly larger thickness, a capacity of several to tens of mA, and a cycle life of about 500-1000 times, which is close to conventional polymer lithium-ion batteries. The discharge performance is worse than the above-mentioned second type of all-solid-state thin-film lithium battery, and because of its larger area and thickness, it is usually used in smart cards with a slightly lower integration level
[0014] Therefore, although the all-solid-state polymer lithium-ion battery using polymer technology can be prepared into various shapes, the number of cycles is long, and the preparation cost is relatively low, it still has many fatal shortcomings: such as the interface between the electrolyte and the electrode is unstable and easy to crystallize. , poor mechanical properties, sensitive to temperature and narrow applicable temperature range
Obviously, there is a considerable difference from the all-solid-state thin-film lithium battery required by the latest developments
In addition, the patent also does not further explain the performance, physical state, and cycle life of its thin-film lithium battery.

Method used

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  • Full solid thin film lithium battery and its producing method
  • Full solid thin film lithium battery and its producing method
  • Full solid thin film lithium battery and its producing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] see picture 1. The all-solid-state thin-film lithium battery is composed of a positive electrode film, a solid electrolyte film located between the positive electrode film and the negative electrode film, a current collector film connected to the positive and negative electrodes, and a packaging material film for sealed packaging. The positive electrode material is LiCoO 2 , the negative electrode material is SnN x , the solid electrolyte is LiPON, the current collector film connected to the positive and negative electrodes is a gold thin layer, and the composite multilayer film of metal / polymer material as the packaging material is an aluminum / polyethylene multilayer composite or aluminum / polypropylene multilayer composite.

[0093] First, the substrate is cleaned. The polymer material substrate (12-75 microns) is cleaned with 1M HCl, then washed with distilled water for 3 times, and dried. Then, direct current sputtering is used to fabricate the positive electrode ...

Embodiment 2

[0099] Except the following differences, others are as in Example 1.

[0100] The negative electrode material is metal lithium, and the substrate is made of ceramics.

[0101] The ceramic material substrate was cleaned with 1M HCl, then washed with distilled water for 5 times, and dried. Then, direct current sputtering is used to make the positive electrode current collector and the gold target, and the thickness of the positive electrode current collector is about 0.3-0.5 microns.

[0102] Next, at 10 -3 -10 -5 Under a vacuum of Pa, in an oxygen atmosphere, LiCoO 2 As the target, the positive electrode is deposited by radio frequency magnetron sputtering, the magnetron sputtering power is 200-300W, the magnetron sputtering rate is 0.8-2 microns / hour, the flow rate is 20-30sccm, and the thickness of the metal oxide film deposited by sputtering at 2-5 microns.

[0103] Then, in a nitrogen atmosphere, the LiPON inorganic electrolyte was sputtered by RF sputtering Li 3 PO ...

Embodiment 3

[0108] Except the following differences, others are as in Example 1.

[0109] The cathode material is LiMn 2 o 4 , the negative electrode material is metallic lithium, and the substrate is made of ceramics.

[0110] The ceramic material substrate was cleaned with 1M HCl, then washed with distilled water for 5 times, and dried. Then, direct current sputtering is used to make the positive electrode current collector and the gold target, and the thickness of the positive electrode current collector is about 0.3-0.5 microns.

[0111] Next, at 10 -3 -10 -5 Under a vacuum of Pa, in an oxygen atmosphere, LiMn 2 o 4 As the target, the positive electrode is deposited by radio frequency magnetron sputtering, the magnetron sputtering power is 300-400W, the magnetron sputtering rate is 0.8-2 microns / hour, the flow rate is 30-40sccm, and the LiMn deposited by sputtering 2 o 4 The thickness of the film is 2-5 microns.

[0112] Then, in a nitrogen atmosphere, the LiPON inorganic ele...

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Abstract

This invention relates to a full solid film Li cell and its manufacturing method, in which, said cell is composed of one positive film selecting from LiCoO2, V2O5 or LiMn2O4, a solid LiPON electrolyte film between the positive and the negative films, a collector film and a package material film as the sealing. The interface of the electrolyte of full solid film Li cells and the electrode is stable, not crystallized and the mechanical performance is strong and having the storing and working temperature from -55 to 300deg.C capable of enduring high temperature and high pressure while keeping high capacity and circulation performance. Besides, the cell can be processes to a flexible film cell with the thickness of 5-8mum, 8-15mum or over.

Description

technical field [0001] The present invention relates to a lithium battery, specifically, the present invention relates to a thin-film lithium battery, and more specifically, the present invention relates to an all-solid-state thin-film lithium battery. The all-solid-state thin-film lithium battery is a brand-new energy storage system. In addition to having excellent electrochemical properties such as high specific energy, long storage life and cycle life, and stable operating voltage, it can also be assembled on metals, ceramics, On substrates such as silicon wafers, polymer films, and semiconductor chips, the thickness is only a few microns to tens of microns, which can greatly reduce or even eliminate the need for battery placement space. Background technique [0002] With the rapid development of the electronics and information industries, new portable electronic products and power tools such as mobile phones and notebook computers are constantly coming out in large numbe...

Claims

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Application Information

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IPC IPC(8): H01M6/18H01M4/48H01M4/58H01M4/38H01M4/66H01M10/04H01M4/525
CPCY02E60/12Y02E60/10Y02P70/50
Inventor 余爱水王卫江吴浩青
Owner FUDAN UNIV
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