Method for Producing Positive Electrode Active Material for Lithium Secondary Battery and Positive Electrode Active Material for Lithium Secondary Battery Produced Thereby
US-2023074059-A1 · Mar 9, 2023 · US
Electrode mixture production method, electrode mixture, electrode, and lithium-ion battery
US12347867B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12347867-B2 |
| Application number | US-202217945642-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 15, 2022 |
| Priority date | Sep 22, 2021 |
| Publication date | Jul 1, 2025 |
| Grant date | Jul 1, 2025 |
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- Title
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Abstract
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Disclosed is a method in which both the suppression of granulation of an active material and the acceleration of production steps are achieved when producing an electrode mixture containing a coated active material. The method comprises dropletizing a slurry containing an active material and a coating liquid to obtain slurry droplets, gas-flow drying the slurry droplets in a heating gas to obtain a first and a second precursor, and firing the first and the second precursor to obtain a first and second particle, wherein the first precursor contains the active material and a component from the coating liquid, the second precursor is free of the active material and contains a component from the coating liquid, the first particle has the active material and a coating layer, and the second particle is free of the active material and contains a component same as that constituting the coating layer.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for producing an electrode mixture, comprising: dropletizing a slurry containing an active material and a coating liquid to obtain slurry droplets; gas-flow drying the slurry droplets in a heating gas to obtain a first precursor and a second precursor; and firing the first precursor and the second precursor to obtain a first particle and a second particle, wherein the first precursor contains the active material and a component from the coating liquid, the second precursor is free of the active material and contains a component from the coating liquid, the first particle has the active material and a coating layer covering at least a portion of a surface of the active material, and the second particle is free of the active material and contains a component same as that constituting the coating layer. 2. The method according to claim 1 , wherein the heating gas has a temperature of 250° C. or higher. 3. The method according to claim 1 , wherein the slurry droplets are obtained by spraying the slurry. 4. The method according to claim 1 , wherein the coating liquid contains at least a lithium source and a niobium source. 5. The method according to claim 4 , wherein the coating liquid contains a niobium peroxo complex as the niobium source. 6. The method according to claim 1 , comprising mixing at least the first particle, the second particle, and a solid electrolyte.
Assignees
Inventors
Classifications
Positive electrodes · CPC title
containing manganese · 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
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title
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- What does patent US12347867B2 cover?
- Disclosed is a method in which both the suppression of granulation of an active material and the acceleration of production steps are achieved when producing an electrode mixture containing a coated active material. The method comprises dropletizing a slurry containing an active material and a coating liquid to obtain slurry droplets, gas-flow drying the slurry droplets in a heating gas to obta…
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M4/139. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jul 01 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 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).