Granted Patent B2

US 12,614,732 · App. 17/906,285 · Granted Apr 28, 2026

Inventors: Kazuki Takagi (Tokyo, JP); Takuya Kaneda (Tokyo, JP)

Assignee: ZEON CORPORATION

H01M4/622H01G11/26H01G11/52H01M4/628H01M10/0525H01M50/446H01M50/449H01M2004/021Y02P70/50

Abstract

Claims (9)

1 . A functional layer for an electrochemical device, comprising: a non-conductive heat-resistant particle layer containing non-conductive heat-resistant particles; and a particulate polymer, wherein

the particulate polymer is dispersed in the non-conductive heat-resistant particle layer,

the particulate polymer has a particle diameter distribution value, expressed by Dv/Dn, of not less than 1.00 and less than 1.10, where Dv is a value for volume-average particle diameter of the particulate polymer and Dn is a value for number-average particle diameter of the particulate polymer, and

a buried fraction of the particulate polymer in the non-conductive heat-resistant particle layer is 30% or less,

wherein the buried fraction is a value that indicates a proportion of the number of particles of the particulate polymer that are buried in the non-conductive heat-resistant particle layer among 100 arbitrarily selected particles of the particulate polymer contained in the functional layer, and a particle of the particulate polymer is determined to be buried when the particle is completely buried in the non-conductive heat-resistant particle layer and does not have a section protruding from a surface of the non-conductive heat-resistant particle layer.

2 . The functional layer for an electrochemical device according to claim 1 , wherein a value obtained by dividing the volume-average particle diameter Dv of the particulate polymer by layer thickness of the non-conductive heat-resistant particle layer is not less than 0.75 and not more than 4.00.

3 . The functional layer for an electrochemical device according to claim 2 , wherein the value obtained by dividing the volume-average particle diameter Dv of the particulate polymer by the layer thickness of the non-conductive heat-resistant particle layer is more than 1.00.

4 . A laminate for an electrochemical device comprising the functional layer for an electrochemical device according to claim 1 stacked on a substrate.

5 . An electrochemical device comprising the functional layer for an electrochemical device according to claim 1 .

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (23)