Composite cathode active material and secondary battery including the same
US-2018212233-A1 · Jul 26, 2018 · US
Positive electrode composite active material particle, and method for producing same, positive electrode, and solid-state battery
US2021305562A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2021305562-A1 |
| Application number | US-202117211848-A |
| Country | US |
| Kind code | A1 |
| Filing date | Mar 25, 2021 |
| Priority date | Mar 31, 2020 |
| Publication date | Sep 30, 2021 |
| Grant date | — |
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Abstract
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To provide a positive electrode composite active material particle capable of reducing resistance even when a battery binding force is small or even when a blending amount of positive electrode active material particles is high, and a method for producing the positive electrode composite active material particle, a positive electrode including the positive electrode composite active material particle, and a solid-state battery including the positive electrode. A positive electrode composite active material particle including positive electrode active material particles each made of a lithium-containing oxide and having a surface at least a part of which is coated with a coating material including a sulfide solid electrolyte, and a method for producing the positive electrode composite active material particle, a positive electrode including the positive electrode composite active material particle, and a solid-state battery including the positive electrode.
First claim
Opening claim text (preview).
What is claimed is: 1 . A positive electrode composite active material particle comprising a positive electrode active material particle made of a lithium-containing oxide and having a surface at least a part of which is coated with a coating material comprising a sulfide solid electrolyte. 2 . The positive electrode composite active material particle according to claim 1 , wherein the coating material further comprises a conductive auxiliary agent. 3 . The positive electrode composite active material particle according to claim 1 , wherein a value of D/t is in a range of 9.0 to 150 where D (nm) is a particle diameter D50 of the positive electrode active material particle and t (nm) is an average thickness of the coating material. 4 . The positive electrode composite active material particle according to claim 3 , wherein in a cross-sectional image of the positive electrode composite active material particle, a rate of an area of the sulfide solid electrolyte in a region at a distance of t (nm) or less from the surface of the positive electrode active material particle with respect to an entire area of the region is 40% or more. 5 . The positive electrode composite active material particle according to claim 1 , wherein the positive electrode active material particle comprises a lithium composite oxide. 6 . The positive electrode composite active material particle according to claim 1 , wherein the positive electrode active material particle is a composite oxide having a layered rock-salt structure comprising any element of Ni, Co, and Mn. 7 . A method for producing a positive electrode composite active material particle of claim 1 , the method comprising: a mixing step of dry mixing the positive electrode active material particle and the coating material comprising the sulfide solid electrolyte with each other to obtain the positive electrode composite active material particle having a surface a part of which is coated with the coating material comprising the sulfide solid electrolyte. 8 . A positive electrode comprising the positive electrode composite active material particle according to claim 1 . 9 . A solid-state battery comprising the positive electrode according to claim 8 .
Assignees
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Classifications
of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title
Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title
Carbon or graphite · CPC title
Positive electrodes · CPC title
Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence) · CPC title
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- What does patent US2021305562A1 cover?
- To provide a positive electrode composite active material particle capable of reducing resistance even when a battery binding force is small or even when a blending amount of positive electrode active material particles is high, and a method for producing the positive electrode composite active material particle, a positive electrode including the positive electrode composite active material pa…
- Who is the assignee on this patent?
- Honda Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M4/366. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Sep 30 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).