Sulfide-based solid electrolyte, method for producing the sulfide-based solid electrolyte, and method for producing all-solid-state battery
US-2019356017-A1 · Nov 21, 2019 · US
Negative electrode layer, method for manufacturing negative electrode layer, and all-solid-state battery
US2023207777A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2023207777-A1 |
| Application number | US-202217963240-A |
| Country | US |
| Kind code | A1 |
| Filing date | Oct 11, 2022 |
| Priority date | Dec 27, 2021 |
| Publication date | Jun 29, 2023 |
| Grant date | — |
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Abstract
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A negative electrode layer that is used for an all-solid-state battery includes: lithium titanate; a sulfide solid electrolyte; and a rubber binder. The ratio of the amount A of the rubber binder adsorbed on the lithium titanate to the total content B of the rubber binder in the negative electrode layer is 1.35% or less.
First claim
Opening claim text (preview).
What is claimed is: 1 . A negative electrode layer that is used for an all-solid-state battery, the negative electrode layer comprising: lithium titanate; a sulfide solid electrolyte; and a rubber binder, wherein a ratio of an amount A of the rubber binder adsorbed on the lithium titanate to a total content B of the rubber binder in the negative electrode layer is 1.35% or less. 2 . The negative electrode layer according to claim 1 , wherein the rubber binder contains styrene-butadiene rubber. 3 . The negative electrode layer according to claim 1 , wherein the lithium titanate has a composition represented by Li 4 Ti 5 O 12 . 4 . The negative electrode layer according to claim 1 , wherein a proportion of the rubber binder in the negative electrode layer is 1% by volume or more and 20% by volume or less, a proportion of the lithium titanate in the negative electrode layer is 20% by volume or more and 80% by volume or less, and a proportion of the sulfide solid electrolyte in the negative electrode layer is 15% by volume or more and 75% by volume or less. 5 . A method for manufacturing a negative electrode layer that is used for an all-solid-state battery, the method comprising: preparing a dispersion in which a sulfide solid electrolyte and a first component are dispersed in a dispersion medium; adding a second component to the dispersion and dispersing the second component in the dispersion to obtain a negative electrode paste; and applying and drying the negative electrode paste to form the negative electrode layer, wherein one of the first component and the second component is lithium titanate, and the other is a rubber binder. 6 . The method according to claim 5 , wherein the first component is the lithium titanate, and the second component is the rubber binder. 7 . The method according to claim 5 , wherein preparing the dispersion includes adding the first component to the dispersion medium and performing a first dispersion process to obtain a precursor dispersion, and adding the sulfide solid electrolyte to the precursor dispersion and performing a second dispersion process to obtain the dispersion. 8 . An all-solid-state battery, comprising: a positive electrode layer; a negative electrode layer; and a solid electrolyte layer located between the positive electrode layer and the negative electrode layer, wherein the negative electrode layer includes lithium titanate, a sulfide solid electrolyte, and a rubber binder, and a ratio of an amount A of the rubber binder adsorbed on the lithium titanate to a total content B of the rubber binder in the negative electrode layer is 1.35% or less. 9 . The all-solid-state battery according to claim 8 , wherein the rubber binder contains styrene-butadiene rubber.
Assignees
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Classifications
Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title
Negative electrodes · CPC title
Solid materials · CPC title
of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · CPC title
- H01M4/131Primary
Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title
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Frequently asked questions
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- What does patent US2023207777A1 cover?
- A negative electrode layer that is used for an all-solid-state battery includes: lithium titanate; a sulfide solid electrolyte; and a rubber binder. The ratio of the amount A of the rubber binder adsorbed on the lithium titanate to the total content B of the rubber binder in the negative electrode layer is 1.35% or less.
- Who is the assignee on this patent?
- Toyota Motor Co Ltd, Panasonic Holdings Corp
- What technology area does this patent fall under?
- Primary CPC classification H01M4/131. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Jun 29 2023 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).