Method for fabricating an electrochemical device, such as an electrochromic system or an energy storage system, for example a microbattery, a battery or a supercapacitor

Patent metadata

Field	Value
Publication number	US-2017133166-A1
Application number	US-201615346378-A
Country	US
Kind code	A1
Filing date	Nov 8, 2016
Priority date	Nov 10, 2015
Publication date	May 11, 2017
Grant date	—

Abstract

Method for fabricating an electrochemical device, such as an electrochromic system or an energy storage system, including the following successive steps: providing a substrate; forming n individual entities on the substrate, with n greater than or equal to 2, each individual entity including: a first current collector, of a first polarity, a first electrode, an ionically conductive and electrically insulating thin layer, a second electrode, a second current collector, of a second polarity; cutting the substrate, cutting being performed so as to have at least x complete individual entities, on the substrate, with x greater than or equal to 2 and x less than or equal to n; electrically connecting the current collectors of the same polarity of the x complete individual entities in parallel.

First claim

1 . Method for fabricating at least first and second electrochemical devices, such as electrochromic systems or energy storage systems, for example microbatteries, batteries or supercapacitors, comprising the following successive steps:
a) providing a substrate comprising a first group of complete individual entities, each complete individual entity comprising:
a first current collector of a first polarity,
a first electrode,
an ionically conductive and electrically insulating thin layer,
a second electrode,
a second current collector of a second polarity,
b) cutting the substrate so as to form at least second and third groups of individual entities each comprising a plurality of complete individual entities from the first group of complete individual entities, cutting being performed so as to form a plurality of non-complete individual entities in each of the second and third groups of individual entities, all or part of the individual entities located at a periphery of the second group of individual entities and/or of the third group of individual entities being non-complete individual entities, c) electrically connecting the first and/or second current collectors of a same polarity of the complete individual entities of the second group of individual entities in parallel without electrically connecting the non-complete individual entities to form the first electrochemical device, d) electrically connecting the first and/or second current collectors of a same polarity of the complete individual entities of the third group of individual entities in parallel without electrically connecting the non-complete individual entities to form the second electrochemical device.

2 . Method according to claim 1 , wherein, in step b), the substrate is cut in the shape of a square, a rectangle, an equilateral triangle or a hexagon.

3 . Method according to claim 1 , wherein a surface of a space between the complete individual entities represents less than 20% of the surface of the complete individual entities.

4 . Method according to claim 3 , wherein the surface of the space between the complete individual entities represents less than 10% of the surface of the complete individual entities.

5 . Method according to claim 4 , wherein the surface of the space between the complete individual entities represents less than 5% of the surface of the complete individual entities.

6 . Method according to claim 1 , wherein the distance separating two adjacent individual entities is smaller than a width of the cutting device during the cutting step of the substrate.

7 . Method according to claim 1 , wherein after step b), and before steps c) and d), the non-complete individual entities are eliminated.

8 . Method according to claim 7 , wherein the non-complete individual entities are eliminated by an etching step.

9 . Method according to claim 8 , wherein the non-complete individual entities are eliminated by a wet etching method.

10 . Method according to claim 1 , wherein the individual entities are regularly spaced apart from one another.

11 . Method according to claim 1 , wherein:
the first current collector is formed on a first surface of the substrate, the first electrode, the ionically conductive and electrically insulating thin layer, the second electrode, and the second current collector of a second polarity, are formed on a second surface of the substrate,
and wherein the current collectors located on a same surface of the substrate are electrically connected by an electrically conductive layer.

12 . Method according to claim 1 , wherein the first current collector, the first electrode, the ionically conductive and electrically insulating thin layer, the second electrode, and the second current collector of a second polarity, are formed on a same surface of the substrate.

13 . Method according to claim 1 , wherein the first current collector is formed by deposition of a continuous electrically conductive film on a first surface of the substrate, the first current collector being common to all the individual entities.

14 . Method according to claim 1 , comprising a step during which the first current collector at a periphery of a cutting area is made accessible.

15 . Method according to claim 1 , wherein the second current collectors of the complete individual entities are electrically connected by an electrically conductive layer.

16 . Method according to claim 15 , wherein the electrically conductive layer is a metallic film or an electrically insulating film covered by an electrically conductive layer.

17 . Method according to claim 1 , wherein the non-complete individual entities are formed by cutting complete individual entities during step b).

18 . Electrochemical device, such as an electrochromic system or an energy storage system, for example a microbattery, a battery or a supercapacitor, comprising:
a substrate provided with first and second surfaces, a plurality of complete individual entities, arranged on the substrate, each complete individual entity comprising:
a first current collector of a first polarity,
a first electrode,
an ionically conductive and electrically insulating thin layer,
a second electrode,
a second current collector of a second polarity,

the current collectors of the same polarity of the complete individual entities being electrically connected in parallel.
at least one non-complete individual entity, located on the substrate, at a periphery of the substrate.

19 . Device according to claim 18 , wherein the surface of the space between the complete individual entities represents less than 20% of the surface of the complete individual entities, preferably less than 10% of the surface of the complete individual entities, and even more preferentially less than 5% of the surface of the complete individual entities.

20 . Device according to claim 18 , wherein the individual entities are regularly spaced apart from one another.

Assignees

• Commissariat à l'Energie Atomique et aux Energies Alternatives

Inventors

• Oukassi Sami
• Gaillard Frédéric
• SALOT Raphaël

Classifications

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title

• H01G11/66

  Current collectors · CPC title

• H01G11/10

  Multiple hybrid or EDL capacitors, e.g. arrays or modules (housings, cases, encapsulations or mountings thereof H01G11/78) · CPC title

• H01G11/56

  Solid electrolytes, e.g. gels; Additives therein · CPC title

• H01G11/58

  Liquid electrolytes · CPC title