Electrochromic device based on three-dimensional motion of lithium ions and application thereof

Patent metadata

Field	Value
Publication number	US-2020272013-A1
Application number	US-201816315603-A
Country	US
Kind code	A1
Filing date	Mar 2, 2018
Priority date	Feb 27, 2018
Publication date	Aug 27, 2020
Grant date	—

Abstract

Provided are an electrochromic device based on three-dimensional motion of lithium ions and an application thereof. The electrochromic device based on three-dimensional motion of lithium ions comprises an upper and an lower transparent electrode layer, and an electrolyte layer and a discoloration layer which are arranged between the upper transparent electrode layer and the lower transparent electrode layer. A first external circuit is connected between the upper transparent electrode layer and the lower transparent electrode layer; and a second external circuit is connected between two ends of the transparent electrode layer adjacent to the discoloration layer. The electrochromic device realizes intelligent dimming based on three-dimensional motion of lithium ions.

First claim

1 . An electrochromic device based on three-dimensional motion of lithium ions, comprising an upper transparent electrode layer, a lower transparent electrode layer, and an electrolyte layer and a discoloration layer which are arranged between the upper transparent electrode layer and the lower transparent electrode layer, wherein a first external circuit is connected between the upper transparent electrode layer and the lower transparent electrode layer for providing an initialization voltage; and a second external circuit is connected between two ends of a transparent electrode layer adjacent to the discoloration layer in the upper transparent electrode layer and the lower transparent electrode layer for providing a transverse operating voltage.

2 . The electrochromic device based on three-dimensional motion of lithium ions according to claim 1 , wherein the upper transparent electrode layer and the lower transparent electrode layer are selected from a group consisting of a transparent conductive oxide film, a carbon nanotube film, a graphene film, a silver nanowire film and a combination combining multiple selections of these films.

3 . The electrochromic device based on three-dimensional motion of lithium ions according to claim 1 , wherein the electrolyte layer is a gel electrolyte layer, an all-solid electrolyte layer or a liquid electrolyte layer.

4 . The electrochromic device based on three-dimensional motion of lithium ions according to claim 1 , wherein the electrolyte layer has a thickness of 100 nm˜2 mm.

5 . The electrochromic device based on three-dimensional motion of lithium ions according to claim 1 , wherein the discoloration layer is an electrochromic metal oxide film.

6 . The electrochromic device based on three-dimensional motion of lithium ions according to claim 1 , further comprising an adhesion agent, wherein the adhesion agent is arranged in a relative gap between the upper transparent electrode layer and the lower transparent electrode layer, so as to realize encapsulation.

7 . A method for controlling an electrochromic device based on three-dimensional motion of lithium ions, comprising the following steps:
S1: applying an initialization voltage between an upper transparent electrode layer and a lower transparent electrode layer, and implanting lithium ions into a discoloration layer from an electrolyte layer, such that the discoloration layer is uniformly colored, light transmittance of the discoloration layer is lowered, and the discoloration layer is in an initialized state; S2: removing the initialization voltage, applying a transverse operating voltage between two ends of a transparent electrode layer which is adjacent to the discoloration layer, and migrating the lithium ions in the discoloration layer, such that light transmittance of a part of area of the discoloration layer is increased, and this part of area is in a discolored state, while light transmittance of the other part of area is lowered, and this part of area is in a deeply colored state; and S3: removing the transverse operating voltage, and diffusing lithium ions in the discoloration layer from an area in a deeply colored state to an area in a discolored state, such that the discoloration layer restores to a uniformly colored state.

8 . The method for controlling an electrochromic device based on three-dimensional motion of lithium ions according to claim 7 , wherein light transmittance of the discoloration layer in a discolored state is greater than light transmittance of the discoloration layer in an initialized state, while light transmittance of the discoloration layer in an initialized state is greater than light transmittance of the discoloration layer in a deeply colored state.

9 . The method for controlling an electrochromic device based on three-dimensional motion of lithium ions according to claim 7 , wherein the initialization voltage has a value of 2˜3V, and the transverse operating voltage has a value of 3˜50V.

10 . The method for controlling an electrochromic device based on three-dimensional motion of lithium ions according to claim 7 , further comprising step S4: applying an initialization voltage again between the upper transparent electrode layer and the lower transparent electrode layer, such that the discoloration layer restores to an initialized state.

11 . The method for controlling an electrochromic device based on three-dimensional motion of lithium ions according to claim 8 , wherein the initialization voltage has a value of 2˜3V, and the transverse operating voltage has a value of 3˜50V.

12 . The method for controlling an electrochromic device based on three-dimensional motion of lithium ions according to claim 8 , further comprising step S4: applying an initialization voltage again between the upper transparent electrode layer and the lower transparent electrode layer, such that the discoloration layer restores to an initialized state.

Assignees

• Univ Wuyi

Inventors

• Tang Xiufeng
• Luo Jianyi
• Wang Siyuan
• Huang Jingcheng
• Chen Guoxin
• Mo Zhaopeng
• Zheng Guoxiang

Classifications

• E06B2009/2464

  featuring transparency control by applying voltage, e.g. LCD, electrochromic panels · CPC title

• E06B9/24

  Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; {Slat blinds}(operating, guiding or securing devices or arrangements for roll-type closures E06B9/56; free-hanging flexible screens A47H23/00) · CPC title

• G02F2001/15025

  having an inorganic electrochromic layer and a second solid organic electrochromic layer · CPC title

• G02F1/15 Primary

  based on an electrochromic effect · CPC title

• G02F1/155 Primary

  Electrodes · CPC title