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Thin film solid lithium ion secondary battery and manufacturing method thereof

A secondary battery and solid-state lithium technology, applied in the field of lithium-ion batteries, can solve problems such as size and thickness limitations, achieve stable yield, stable driving, and improved durability

Inactive Publication Date: 2011-12-28
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to reliably seal the gel electrolyte, its size and thickness reduction is limited

Method used

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  • Thin film solid lithium ion secondary battery and manufacturing method thereof
  • Thin film solid lithium ion secondary battery and manufacturing method thereof
  • Thin film solid lithium ion secondary battery and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach (1

[0055] figure 1 is a view illustrating a schematic structure of a solid-state lithium ion battery in Embodiment (1) of the present invention. figure 1 (A) is a floor plan, figure 1 (B) is a X-X cross-sectional view, figure 1 (C) is a Y-Y cross-sectional view.

[0056] Such as figure 1 As shown, the solid-state lithium ion battery has an inorganic insulating film 20 formed on the face of a substrate (organic insulating substrate) 10 . The solid-state lithium ion battery has a laminate in which a positive electrode-side current collector film 30 , a positive electrode active material film 40 , a solid electrolyte film 50 , a negative electrode active material film 60 , and a negative electrode side current collector film 70 are sequentially formed on an inorganic insulating film 20 body. A total protective film 80 made of, for example, an ultraviolet curing resin is formed to entirely cover the laminated body and the inorganic insulating film 20 .

[0057] figure 1 ...

Embodiment approach (2

[0061] figure 2 is a view illustrating a schematic structure of a solid-state lithium ion battery in Embodiment (2) of the present invention. figure 2 (A) is a floor plan, figure 2 (B) is an X-X cross-sectional view.

[0062] Such as figure 2 As shown, the solid-state lithium ion battery has an inorganic insulating film 20 formed on the face of a substrate (organic insulating substrate) 10 . The solid-state lithium ion battery has a laminated body composed of the positive electrode side current collector film 30 and the positive electrode active material film 40 and a laminated body composed of the negative electrode side current collector film 70 and the negative electrode active material film 60 . The solid electrolyte membrane 50 is formed to entirely cover the above-mentioned two laminates arranged in line on the inorganic insulating film 20, and the overall protective film 80 made of, for example, an ultraviolet curing resin is formed to entirely cover the solid el...

Embodiment 1

[0084] formed with figure 1 The structure shown is a solid-state lithium-ion battery. In consideration of mass production capability and cost, a polycarbonate (PC) substrate having a thickness of 1.1 mm was used as the substrate 10 . Alternatively, a substrate made of a glass material, acrylic, or the like may be used. Any substrate that has no conductivity and whose surface is sufficiently flat with respect to the film thickness of the formed battery can be used. As the inorganic insulating film 20, Si having a thickness of 200 nm 3 N 4 A film is formed on the entire surface of the substrate 10 .

[0085] Such as figure 1 As shown, the laminate is formed by sequentially forming a positive electrode side current collector film 30, a positive electrode active material film 40, a solid electrolyte film 50, a negative electrode active material film 60, and a negative electrode side on an inorganic insulating film 20 using a metal mask. collector film 70 . However, the st...

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Abstract

The present invention discloses a high-performance and inexpensive thin-film solid-state lithium ion secondary battery and a method of manufacturing the battery, which can be charged and discharged in the air and can be stably manufactured with a satisfactory yield. The thin-film solid-state lithium ion secondary battery has: an electrically insulating substrate (10) formed of an organic resin; an insulating film (20) made of an inorganic material and formed on the surface of the substrate; a positive electrode side current collector A membrane (30); a cathode active material membrane (40); a solid electrolyte membrane (50); an anode active material membrane (60); and an anode-side current collector membrane (70). In this thin-film solid-state lithium ion secondary battery, the positive electrode side current collector film and / or the negative electrode side current collector film are formed on the face of the above-mentioned insulating film, and the film thickness of the above-mentioned insulating film is greater than or equal to 10 nm and less than Or equal to 200nm. The insulating film has an area larger than that of the positive electrode-side current collector film or the negative electrode-side current collector film, or larger than the total area of ​​the positive electrode-side current collector film and the negative electrode-side current collector film. The aforementioned inorganic material includes at least one of oxides, nitrides, and sulfides containing any one of Si, Al, Cr, Zr, Ta, Ti, Mn, Mg, and Zn.

Description

technical field [0001] The present invention relates to a lithium-ion battery, in particular to a thin-film solid-state lithium-ion secondary battery, wherein all layers formed on a substrate and constituting the battery can be formed by a dry process, and to a manufacturing method thereof. Background technique [0002] Lithium-ion secondary batteries have higher energy density and better charge-discharge cycle characteristics than other secondary batteries, so lithium-ion secondary batteries are widely used as power sources for mobile electronic devices. In a lithium ion secondary battery using an electrolytic solution as an electrolyte, reduction in size and thickness thereof is limited. Accordingly, polymer batteries using gel electrolytes and thin-film solid-state batteries using solid electrolytes have been developed. [0003] In polymer batteries using gel electrolytes, size and thickness reductions are easier to achieve than in batteries using electrolyte solutions. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0585H01M4/485H01M4/505H01M4/525H01M10/052H01M10/0562H01M50/121H01M50/131H01M50/141H01M50/403H01M50/548H01M50/562H01M50/564
CPCH01M10/0585H01M2/145H01M2/0275H01M4/1397H01M4/1391H01M10/0525H01M2/0212H01M4/70H01M10/0436H01M2/0267Y02E60/122H01M6/40H01M10/0562Y10T29/49115Y02E60/10H01M50/403Y02P70/50H01M50/562H01M50/141H01M50/564H01M50/121H01M50/548H01M50/131
Inventor 佐飞裕一古谷龙也高原克典守冈宏之
Owner SONY CORP
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