Binder for non-aqueous secondary battery, composition for non-aqueous secondary battery functional layer, functional layer for non-aqueous secondary battery, and non-aqueous secondary battery
US-2017309916-A1 · Oct 26, 2017 · US
Conductive paste and mixture paste for lithium ion battery positive electrode
US10468683B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10468683-B2 |
| Application number | US-201715628719-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 21, 2017 |
| Priority date | Jun 22, 2016 |
| Publication date | Nov 5, 2019 |
| Grant date | Nov 5, 2019 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
The present invention provides a conductive paste for positive electrodes of lithium-ion batteries and a mixture paste for positive electrodes of lithium-ion batteries that are inhibited from increasing in viscosity and gelling, and that have an easy-to-apply viscosity. The conductive paste of the present invention contains a dispersion resin (A), polyvinylidene fluoride (B), conductive carbon (C), a solvent (D), and a dehydrating agent (E).
First claim
Opening claim text (preview).
The invention claimed is: 1. A conductive paste for positive electrodes of lithium-ion batteries comprising a dispersion resin (A), polyvinylidene fluoride (B), conductive carbon (C), a solvent (D), and a dehydrating agent (E), wherein the solvent (D) comprises N-methyl-2-pyrrolidone. 2. The conductive paste for positive electrodes of lithium-ion batteries according to claim 1 , wherein the dehydrating agent (E) has a boiling point or sublimation point of 200° C. or less. 3. The conductive paste for positive electrodes of lithium-ion batteries according to claim 1 , wherein the dispersion resin (A) comprises a polycyclic aromatic hydrocarbon group-containing resin (A1). 4. The conductive paste for positive electrodes of lithium-ion batteries according to claim 1 , wherein the dispersion resin (A) comprises a polyvinyl alcohol resin (A2). 5. The conductive paste for positive electrodes of lithium-ion batteries according to claim 1 , wherein the conductive carbon (C) comprises acetylene black. 6. The conductive paste for positive electrodes of lithium-ion batteries according to claim 1 , wherein the conductive carbon (C) comprises graphite. 7. The conductive paste for positive electrodes of lithium-ion batteries according to claim 1 , wherein the dehydrating agent (E) is an acidic compound. 8. The conductive paste for positive electrodes of lithium-ion batteries according to claim 1 , wherein the conductive paste has a water content of less than 1.0 mass %. 9. A method for producing the conductive paste for positive electrodes of lithium-ion batteries according to claim 1 , comprising mixing and/or dispersing a pigment in an atmosphere at a dew point of 10° C. or less. 10. A mixture paste for positive electrodes of lithium-ion batteries comprising the conductive paste according to claim 1 and an electrode active material mixed with the conductive paste. 11. The mixture paste for positive electrodes of lithium-ion batteries according to claim 10 , wherein the mixture paste has a lithium hydroxide content of less than 1.5 mass %, based on the mass of the polyvinylidene fluoride (B). 12. An electrode for positive electrodes of lithium-ion batteries obtained by using the mixture paste for positive electrodes of lithium-ion batteries according to claim 10 . 13. A lithium ion battery comprising the electrode for positive electrodes of lithium-ion batteries according to claim 12 .
Assignees
Inventors
Classifications
- H01M4/62Primary
Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title
Carbon or graphite · CPC title
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title
of pasted electrodes · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US10468683B2 cover?
- The present invention provides a conductive paste for positive electrodes of lithium-ion batteries and a mixture paste for positive electrodes of lithium-ion batteries that are inhibited from increasing in viscosity and gelling, and that have an easy-to-apply viscosity. The conductive paste of the present invention contains a dispersion resin (A), polyvinylidene fluoride (B), conductive carbon …
- Who is the assignee on this patent?
- Kansai Paint Co Ltd, Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M4/62. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Nov 05 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).