Electrochromic multi-layer devices with cross-linked ion conducting polymer
AssigneeKinestral Technologies, Inc.
InventorsNicolas Timmerman, Mark Micklatcher, Justin Kerszulis
Life of this patent
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Abstract
Multi-layer electrochromic structures, and processes for assembling such structures, incorporating a cross-linked ion conducting polymer layer that maintains high adhesive and cohesive strength in combination with high ionic conductivity for an extended period of time, the ion conducting polymer layer characterized by electrochemical stability at voltages between about 1.3 V and about 4.4 V relative to lithium, lithium ion conductivity of at least about 10−5 s/cm, and lap shear strength of at least 100 kPa, as measured at 1.27 mm/min in accordance with ASTM International standard D1002 or D3163.
Claims12
An electrochromic multi-layer stack, comprising:
- a first substrate and a second substrate, each having a transparent conductive layer on at least one surface;
- an electrochromic electrode and an electrochromic counter electrode in contact with the transparent conductive layers;
- a cross-linked lithium-ion conducting polymer layer between the first electrochromic electrode and the electrochromic counterelectrode;
- and
- wherein, at room temperature, the cross-linked ion conducting polymer (i) is electrochemically stable at voltages between about 1.3 V and about 4.4 V relative to lithium, (ii) has a lithium ion conductivity of at least about 10−5 S/cm, and (iii) has a lap shear strength of at least 100 kPa, as measured at 1.27 mm/min in accordance with ASTM International standard D1002 or D3163.
A process for manufacturing an electrochromic multi-layer stack, the process comprising:
- (A) depositing an ion conducting polymer feedstock onto a first substrate comprising a first transparent conductive layer and a first electrode layer,
- (B) laminating a second substrate comprising a second transparent conductive layer and a second electrode layer to the first substrate to form an electrochromic multi-layer stack comprising, in succession, the first substrate, the first transparent conductive layer, the first electrode layer, the ion conducting polymer feedstock layer, the second electrode layer, the second transparent conductive layer, and the second substrate;
- and
- (C) irradiating the electrochromic multi-layer stack to polymerize the ion conducting polymer feedstock, forming a cross-linked ion conducting polymer layer, wherein the cross-linked ion conducting polymer, at room temperature, (i) is electrochemically stable at voltages between about 1.3 V and about 4.4 V relative to lithium, (ii) has a lithium ion conductivity of at least about 10−5 S/cm, and (iii) lap shear strength of at least 100 kPa, as measured at 1.27 mm/min in accordance with ASTM International standard D1002 or D3163.
Dependencies are inferred from the claim text.