Secondary battery
US-10367205-B2 · Jul 30, 2019 · US
Cathode of accumulator, associated accumulator and battery
US11217794B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11217794-B2 |
| Application number | US-201716068352-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 30, 2017 |
| Priority date | May 30, 2017 |
| Publication date | Jan 4, 2022 |
| Grant date | Jan 4, 2022 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
The present invention relates to composite material comprising a matrix and a metallic layer located at at least one surface of said composite material, said matrix comprising at least one polymer and a first population of particles of at least one electronically conducting metal, said layer comprising a second population of particles of at least one electronically conducting metal, a method for preparing such composite material and applications thereof.
First claim
Opening claim text (preview).
The invention claimed is: 1. A cathode of electrochemical accumulator comprising: an electrode, a current collector, an interface layer, the interface layer being coated on the current collector, and the interface layer being also in contact with the electrode and having a thickness of less than 5 micrometers, wherein the electrode is made in a first composition consisting of a first intercalation material and a first binder material, wherein the interface layer provides with an increase of retention of capacity of the electrochemical accumulator of at least 10%, wherein the interface layer comprises a second composition including a second binder material and a second conductive additive, wherein a content of the second binder material is greater than or equal to 30% by weight of the interface layer, and wherein a content of the first binder material is less than 5% by weight. 2. The cathode according to claim 1 , wherein the first binder material consists in one or more polymers. 3. The cathode according to claim 1 , wherein the interface layer has a thickness greater than or equal to 10 nanometers. 4. The cathode according to claim 1 , wherein the interface layer has a thickness of between 50 nanometers and 1 micrometer. 5. The cathode according to claim 1 , wherein the collector is a metal sheet. 6. The cathode according to claim 1 , wherein the second binder material consists of one or more polymers. 7. The cathode according to claim 1 , wherein a content of the second conductive additive is greater than or equal to 10% by weight of the interface layer. 8. An electrochemical accumulator, comprising: a cathode according to claim 1 ; and an electrolyte including a solvent or solvent mixture. 9. The electrochemical accumulator according to claim 8 , wherein the accumulator is a lithium-ion accumulator. 10. A battery comprising a set of accumulators, wherein at least one accumulator is an electrochemical accumulator according to claim 8 . 11. The cathode according to claim 1 , wherein the interface layer provides with an increase of the retention of capacity of the electrochemical accumulator of at least 20%.
Assignees
Inventors
Classifications
- H01M4/13Primary
Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title
being polymers · CPC title
Metal or alloys, e.g. alloy coatings (H01M4/669 take precedence) · CPC title
- H01M4/667Primary
in the form of layers, e.g. coatings · CPC title
Carbon or graphite · CPC title
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Frequently asked questions
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- What does patent US11217794B2 cover?
- The present invention relates to composite material comprising a matrix and a metallic layer located at at least one surface of said composite material, said matrix comprising at least one polymer and a first population of particles of at least one electronically conducting metal, said layer comprising a second population of particles of at least one electronically conducting metal, a method fo…
- Who is the assignee on this patent?
- Armor, Centre Nat Rech Scient, Univ Nantes
- What technology area does this patent fall under?
- Primary CPC classification H01M4/13. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jan 04 2022 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 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).