# US 9,429,808 B2 · Electrochromic device

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- Number: US 9,429,808 B2
- Document ID: US9429808B2
- Status: Granted
- Kind: B2
- Application number: 14/800,184
- Filed: 2015-07-15
- Published: 2016-01-21
- Granted: 2016-08-30
- Earliest claimed: 2014-07-16
- Assignees: Commissariat A L'energie Atomique Et Aux Energies Alternatives
- Applicants: Commissariat a l'Energie Atomique et aux Energies Alternatives
- Inventors: Sami Oukassi; Christophe Dubarry
- Web page: https://patentgrep.com/patent/US9429808B2

## CPC

- G02F 1/1524: Transition metal compounds
- G02F 1/155: Electrodes
- G02F 2001/1502: {complementary cell}
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS

## Abstract

An electrochromic device including a substrate, an electrolyte placed between a first optically-active electrochromic electrode and a second optically-passive electrochromic electrode, and a quantity X of cations. The first electrode is capable of storing a quantity of cations equal to Y while the second electrode is capable of storing a quantity of cations equal to Z. The first electrode and the second electrode are respectively associated with a first current collector and with a second current collector. The device includes a quantity of cations X such that Y<X<0.30 Z.

## Claims

### Claim 1

An electrochromic device comprising a substrate, an electrolyte placed between a first optically-active electrochromic electrode and a second optically-passive electrochromic electrode, and a quantity X of cations; the first electrode being capable of storing a quantity of cations equal to Y while the second electrode is capable of storing a quantity of cations equal to Z; the first electrode and the second electrode being respectively associated with a first current collector and with a second current collector, wherein the device comprises the quantity X of cations such that Y<X<0.30 Z.

### Claim 2 (depends on 1)

The electrochromic device of claim 1, wherein Y<X<0.15 Z.

### Claim 3 (depends on 1)

The electrochromic device of claim 1, wherein the first electrode is made of a material selected from the group consisting of tungsten oxide WO3; titanium oxides TiOx; tantalum oxides TaOx; molybdenum oxides MoOx; and niobium oxides NbOx.

### Claim 4 (depends on 1)

The electrochromic device of claim 1, wherein the second electrode is made of a material selected from the group consisting of vanadium oxide V2O5; CeVO4; CeO2; and CeO2—SiO2.

### Claim 5 (depends on 1)

The electrochromic device of claim 1:
wherein the first electrode has a thickness in the range from 0.2 to 1 micrometer;
and wherein the second electrode has a thickness in the range from 0.05 to 0.5 micrometer.

### Claim 6 (depends on 1)

The electrochromic device of claim 1, wherein the cations are cations selected from the group consisting of Li+; Na+; and H+.

### Claim 7 (depends on 1)

The electrochromic device of claim 1, wherein the cations are Li+ cations; and wherein the electrolyte is made of a material selected from the group consisting of LiPON; LiNbO3; LiAlF4; Li3N; LZTO; LAGP; LiSiPON; LiBON; and LiSON.

### Claim 8 (depends on 1)

The electrochromic device of claim 1, wherein the device is an all-solid inorganic electrochromic device having Li+ cations as cations.

### Claim 9 (depends on 1)

The electrochromic device of claim 1, wherein the device successively comprises:
the substrate;
the first current collector;
the first electrochromic electrode;
the electrolyte;
the second electrochromic electrode;
the second current collector.

### Claim 10 (depends on 9)

The electrochromic device of claim 9, wherein the first electrochromic electrode is made of WO3.

### Claim 11 (depends on 9)

The electrochromic device of claim 9, wherein the second electrochromic electrode is made of V2O5.

### Claim 12 (depends on 1)

The electrochromic device of claim 1, wherein the device successively comprises:
the substrate;
the second current collector;
the second electrochromic electrode;
the electrolyte;
the first electrochromic electrode;
the first current collector.

### Claim 13 (depends on 12)

The electrochromic device of claim 12, wherein the second electrochromic electrode is made of V2O5.

### Claim 14 (depends on 12)

The electrochromic device of claim 12, wherein the first electrochromic electrode is made of WO3.

### Claim 15 (depends on 1)

A method of preparing the electrochromic device of claim 1, wherein the method comprises the steps of:
depositing a first current collector on a substrate;
depositing on the first current collector a first electrochromic electrode capable of storing a quantity of cations equal to Y;
depositing an electrolyte on the first electrochromic electrode;
depositing on the electrolyte a second electrochromic electrode capable of storing a quantity of cations equal to Z;
introducing a quantity X of cations such that Y<X<0.30 Z during or after the deposition of the second electrochromic electrode;
depositing a second current collector on the second electrochromic electrode.

### Claim 16 (depends on 1)

A method of preparing the electrochromic device of claim 1, wherein the method comprises the steps of:
depositing a second current collector on a substrate;
depositing on the second current collector a second electrochromic electrode capable of storing a quantity of cations equal to Z;
introducing a quantity X of cations such that Y<X<0.30 Z during or after the deposition of the second electrochromic electrode;
depositing an electrolyte on the second electrochromic electrode;
depositing on the electrolyte a first electrochromic electrode capable of storing a quantity of cations equal to Y;
depositing a first current collector on the first electrochromic electrode.