Composition for non-aqueous secondary battery functional layer and method of producing same, functional layer for non-aqueous secondary battery, non- aqueous secondary battery member, and non-aqueous secondary battery

Patent metadata

Field	Value
Publication number	US-12095113-B2
Application number	US-201917262744-A
Country	US
Kind code	B2
Filing date	Jul 30, 2019
Priority date	Aug 7, 2018
Publication date	Sep 17, 2024
Grant date	Sep 17, 2024

Abstract

Provided is a composition for a non-aqueous secondary battery functional layer with which it is possible to form a functional layer that can cause a separator to display excellent shutdown function. The composition for a non-aqueous secondary battery functional layer contains organic particles A. The organic particles A contain a polymer X including an aromatic vinyl monomer unit in a proportion of 20 mass % or more and a wax having a melting point of lower than 95° C. The wax is preferably an ester wax.

First claim

The invention claimed is:

1. A composition for a non-aqueous secondary battery functional layer, wherein
the composition is a slurry composition that contains water and organic particles A,
the organic particles A contain: a saturated fatty acid zinc salt, a polymer X including an aromatic vinyl monomer unit in a proportion of 20 mass % or more and 100 mass % or less; and a wax having a melting point of 40° C. or higher and lower than 95° C., and
the wax is an ester wax.

2. The composition for a non-aqueous secondary battery functional layer according to claim 1 , wherein the organic particles A have a glass-transition temperature of not lower than 30° C. and not higher than 80° C.

3. The composition for a non-aqueous secondary battery functional layer according to claim 1 , further include non-conductive particles.

4. A functional layer for a non-aqueous secondary battery formed of a dried product of the composition for a non-aqueous secondary battery functional layer according to claim 3 , wherein
the functional layer is a porous membrane layer.

5. A non-aqueous secondary battery member comprising: a substrate; and the functional layer for a non-aqueous secondary battery according to claim 4 formed on the substrate, wherein
the substrate is a releasable substrate, a separator substrate, or an electrode substrate.

6. The non-aqueous secondary battery member according to claim 5 , wherein the substrate is the separator substrate.

7. A non-aqueous secondary battery comprising a positive electrode, a negative electrode, a separator, and an electrolyte solution, wherein
at least one of the positive electrode, the negative electrode, or the separator comprises the non-aqueous secondary battery member according to claim 5 .

8. The composition for a non-aqueous secondary battery functional layer according to claim 1 , wherein the organic particles A have a core-shell structure including a particulate core portion that contains the saturated fatty acid zinc salt, the polymer X and the wax and a shell portion that contains a polymer Y that is different from the polymer X,
the polymer Y include a (meth)acrylic acid ester monomer unit and an acid group-containing monomer unit, and
the shell portion partially cover the outer surface of the core portion or completely cover the outer surface of the core portion.

9. A functional layer for a non-aqueous secondary battery formed of a dried product of the composition for a non-aqueous secondary battery functional layer according to claim 1 , wherein
the functional layer is an adhesive layer.

10. A non-aqueous secondary battery member comprising: a substrate; and the functional layer for a non-aqueous secondary battery according to claim 9 formed on the substrate, wherein
the substrate is a releasable substrate, a separator substrate, or an electrode substrate.

11. The non-aqueous secondary battery member according to claim 10 , wherein the substrate is the separator substrate.

12. A non-aqueous secondary battery comprising a positive electrode, a negative electrode, a separator, and an electrolyte solution, wherein
at least one of the positive electrode, the negative electrode, or the separator comprises the non-aqueous secondary battery member according to claim 10 .

Assignees

• Zeon Corp

Inventors

• Taguchi Hiroyuki

Classifications

• H01M50/403

  Manufacturing processes of separators, membranes or diaphragms · CPC title

• H01M50/489

  Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties · CPC title

• H01M50/491

  Porosity · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M4/62

  Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title