Positive electrode active material and preparation method thereof, positive electrode plate, secondary battery, battery module, battery pack, and electric apparatus
US-2024429384-A1 · Dec 26, 2024 · US
Graphene oxide, positive electrode for nonaqueous secondary battery using graphene oxide, method of manufacturing positive electrode for nonaqueous secondary battery, nonaqueous secondary battery, and electronic device
US2020358102A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2020358102-A1 |
| Application number | US-202016939457-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jul 27, 2020 |
| Priority date | Apr 10, 2012 |
| Publication date | Nov 12, 2020 |
| Grant date | — |
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Abstract
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A graphene oxide used as a raw material of a conductive additive for forming an active material layer with high electron conductivity with a small amount of a conductive additive is provided. A positive electrode for a nonaqueous secondary battery using the graphene oxide as a conductive additive is provided. The graphene oxide is used as a raw material of a conductive additive in a positive electrode for a nonaqueous secondary battery and, in the graphene oxide, the atomic ratio of oxygen to carbon is greater than or equal to 0.405.
First claim
Opening claim text (preview).
1 . (canceled) 2 . A positive electrode active material layer comprising: a first portion where first positive electrode active material particles are aggregated; a second portion where second positive electrode active material particles are aggregated; a first carbon material sheet capable of a conductive additive; and a second carbon material sheet capable of a conductive additive, wherein each of the first carbon material sheet and the second carbon material sheet has a structure in which hexagonal skeletons of carbon are spread in a planar form, wherein the first carbon material sheet has a region which wraps the first portion and a region which wraps the second portion, and wherein the first carbon material sheet and the second carbon material sheet are dispersed in the positive electrode active material layer and are in contact with each other. 3 . A positive electrode active material layer comprising: a first secondary particle being a positive electrode active material; a second secondary particle being a negative electrode active material; a first carbon material sheet capable of a conductive additive; and a second carbon material sheet capable of a conductive additive, wherein each of the first carbon material sheet and the second carbon material sheet has a structure in which hexagonal skeletons of carbon are spread in a planar form, wherein the first carbon material sheet has a region which wraps the first secondary particle and a region which wraps the second secondary particle, and wherein the first carbon material sheet and the second carbon material sheet are dispersed in the positive electrode active material layer and are in contact with each other.
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Classifications
Energy storage using batteries · CPC title
Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy · CPC title
Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines · CPC title
Oxidation · CPC title
as mixtures · CPC title
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- What does patent US2020358102A1 cover?
- A graphene oxide used as a raw material of a conductive additive for forming an active material layer with high electron conductivity with a small amount of a conductive additive is provided. A positive electrode for a nonaqueous secondary battery using the graphene oxide as a conductive additive is provided. The graphene oxide is used as a raw material of a conductive additive in a positive el…
- Who is the assignee on this patent?
- Semiconductor Energy Lab
- What technology area does this patent fall under?
- Primary CPC classification H01M4/625. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Nov 12 2020 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).