Active material, positive electrode mixture using same, and solid-state battery
US-2022149354-A1 · May 12, 2022 · US
Coated active material production method and coated active material
US12374677B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12374677-B2 |
| Application number | US-202117470319-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 9, 2021 |
| Priority date | Sep 11, 2020 |
| Publication date | Jul 29, 2025 |
| Grant date | Jul 29, 2025 |
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- Title
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Abstract
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A method for producing a coated active material includes dropletizing a slurry to obtain slurry droplets wherein the slurry contains an active material and a coating liquid, gas-flow drying the slurry droplets in a heating gas to obtain a precursor, and firing the precursor.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for producing a coated active material, the method comprising: dropletizing a slurry by spraying the slurry to obtain slurry droplets wherein the slurry contains an active material and a coating liquid, gas-flow drying the slurry droplets in a heating gas to obtain a precursor, wherein a temperature of the heating gas is between 180° C. and 220° C., and wherein the slurry droplets are disaggregated by the gas-flow drying to obtain a plurality of slurry droplets and the precursor is disaggregated by the gas-flow drying to obtain a plurality of precursors, and firing the plurality of precursors to obtain the coated active material comprising the active material and a coating layer covering at least a part of a surface of the active material, wherein the gas-flow drying comprises a first gas-flow drying in which drying of the slurry droplets is predominant and a second gas-flow drying in which disaggregating of the precursor is predominant, wherein the coating layer has a plurality of vacancies, wherein the plurality of vacancies are present in an interface between the active material and the coating layer and in an interior of the coating layer. 2. The method according to claim 1 , wherein the coating liquid contains a lithium source and a niobium source. 3. The method according to claim 2 , wherein the niobium source contains a niobium peroxo complex.
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Classifications
Physical characteristics, e.g. porosity, surface area · CPC title
of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title
of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title
involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis · CPC title
- H01M4/366Primary
as layered products · CPC title
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Frequently asked questions
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- What does patent US12374677B2 cover?
- A method for producing a coated active material includes dropletizing a slurry to obtain slurry droplets wherein the slurry contains an active material and a coating liquid, gas-flow drying the slurry droplets in a heating gas to obtain a precursor, and firing the precursor.
- Who is the assignee on this patent?
- Toyota 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 Tue Jul 29 2025 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 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).