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Film lithium ion battery and application thereof

A lithium-ion battery and thin-film technology, which is applied to battery electrodes, secondary batteries, battery pack components, etc., can solve the problems of inability to produce thin-film lithium-ion batteries, difficult combination of microelectronic devices, and low volume capacity density, etc., to achieve Good safety performance and electrochemical performance, low cost, and the effect of increasing volume capacity density

Inactive Publication Date: 2010-12-08
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the current aluminum casing, steel casing and aluminum-plastic composite film that cannot produce thin-film lithium-ion batteries with a thickness lower than 0.5mm, and solve the problem of high production cost of thin-film metal lithium secondary batteries, difficulty in large-scale production, and low volume capacity density. It is not high, it is not easy to combine microelectronic devices, etc., and a thin-film lithium-ion battery is provided. The thin-film lithium-ion battery is characterized in that the electrode pole piece includes a metal layer and an outer non-metal layer, and the metal layer is coated with Electrode active material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] On the surface of the same aluminum foil as in Comparative Example 1, a layer of polyethylene shell film with titanium dioxide filler was added, with a thickness of 0.02mm, and then the same positive electrode material as in Comparative Example 1 was coated on the aluminum foil layer. Similarly, the surface of the same copper foil as in Comparative Example 1 was compounded with a layer of polyethylene shell film with titanium dioxide filler, the thickness was 0.02mm, and then the same negative electrode material as in Comparative Example 1 was coated on the aluminum foil layer. Other conditions are the same as Comparative Example 1. Then add electrolyte, form, set aside, and seal. The appearance of the battery is opaque white. After testing, the thinnest thickness of the thin-film lithium-ion battery is 0.265 mm, and the capacity is the same as that of Comparative Example 1.

[0020] The thin-film lithium-ion battery can be conveniently placed in a bank card with a th...

Embodiment 2

[0024] On the same aluminum foil surface as Comparative Example 2, a layer of poly(ethylene terephthalate) blend film is added with nylon fiber reinforcement and red masterbatch, the thickness is 0.02mm, and then the same as Comparative Example 1 The cathode material is coated on the aluminum foil layer. Equally, the composite layer of copper foil surface identical with comparative example 1 is added with the poly(ethylene terephthalate) blend film of nylon fiber reinforcement and red masterbatch, and thickness is 0.02mm, then with comparative example 2 The same negative electrode material is coated on the aluminum foil layer. Other conditions are the same as Comparative Example 2. Then add electrolyte, form, set aside, and seal. The appearance of the battery is red. After testing, the thinnest thickness of the thin-film lithium-ion battery is 0.265 mm, and the capacity is the same as that of Comparative Example 2.

[0025] The thin-film lithium-ion battery can be convenie...

Embodiment 3

[0029] Composite a layer of polyvinyl chloride film with nano-silica reinforcing agent and green masterbatch on the surface of the aluminum foil identical to Comparative Example 3, the thickness is 0.02mm, and then the positive electrode material identical to Comparative Example 3 is coated on the aluminum foil layer . Similarly, the same copper foil surface as Comparative Example 3 is compounded with a layer of polyvinyl chloride film with nano-silica reinforcing agent and green color masterbatch, the thickness is 0.02mm, and then the same negative electrode material as Comparative Example 3 is coated on Aluminum foil layer. Other conditions are the same as in Comparative Example 3. Then add electrolyte, form, set aside, and seal. The appearance of the battery is green. After testing, the thinnest thickness of the thin-film lithium-ion battery is 0.285mm, and the capacity is the same as that of Comparative Example 3.

[0030] The thin-film lithium-ion battery can be conve...

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Abstract

The invention belongs to the technical field of battery and relates to a film lithium ion battery and application thereof. The electrode sheet of the film lithium ion battery comprises a metal layer and an outside non-metal layer. Electrode active materials are coated on the metal layer. The film lithium ion battery has the advantages of good safety and high volume density, and can prevent gas expansion, explosion and combustion. The invention has strong operation, lower cost when compared with the prior art, and good reproducibility, and the prepared product has stable quality and high volume density, and can be applied to IC cards, bank cards and other miniature electronic devices.

Description

technical field [0001] The invention belongs to the technical field of batteries, and relates to a thin-film lithium ion battery. More specifically, the invention relates to a thin-film lithium-ion battery whose electrode pole piece includes a metal layer and an outer non-metal layer. The invention also relates to the application of the thin film lithium ion battery. Background technique [0002] As we all know, lithium-ion batteries (including polymer lithium-ion batteries using polymer electrolytes) have the characteristics of high energy density, high specific power, good cycle performance, no memory effect, and no pollution (Wu Yuping, Dai Xiaobing, Ma Junqi, Cheng Yu Jiang. "Lithium Ion Battery-Application and Practice". Beijing: Chemical Industry Press, 2004; Wu Yuping, Zhang Hanping, Wu Feng, Li Zhaohui, "Polymer Lithium Ion Battery", Beijing: Chemical Industry Press, 2007) , so they develop very rapidly. However, with the development of technology, some small elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/36H01M10/40H01M4/02H01M4/66H01M4/62H01M10/42H01M2/30H01M50/543
CPCY02E60/10
Inventor 张鹏杨黎春施轶吴宇平
Owner FUDAN UNIV
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