Non-aqueous electrolyte secondary battery
US-2020091500-A1 · Mar 19, 2020 · US
Non-aqueous electrolyte secondary battery
US12062789B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12062789-B2 |
| Application number | US-201917252923-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 20, 2019 |
| Priority date | Jun 29, 2018 |
| Publication date | Aug 13, 2024 |
| Grant date | Aug 13, 2024 |
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Abstract
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Disclosed is a non-aqueous electrolyte secondary battery including: a positive electrode; a negative electrode; and an electrolyte solution. The negative electrode contains a negative electrode active material that is capable of electrochemically absorbing and desorbing lithium. The negative electrode active material contains a lithium silicate phase and silicon particles that are dispersed in the lithium silicate phase. The lithium silicate phase is an oxide phase that contains lithium, silicon, and oxygen. The atomic ratio O/Si of oxygen relative to silicon in the lithium silicate phase is greater than 2 and less than 4. The electrolyte solution contains a halogenated benzene. The amount of halogenated benzene contained in the electrolyte solution is 1 ppm or more and 500 ppm or less.
First claim
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The invention claimed is: 1. A non-aqueous electrolyte secondary battery comprising: a positive electrode; a negative electrode; and an electrolyte solution, wherein the negative electrode contains a negative electrode active material that is capable of electrochemically absorbing and desorbing lithium, the negative electrode active material contains a lithium silicate phase and silicon particles that are dispersed in the lithium silicate phase, the lithium silicate phase is an oxide phase that contains lithium, silicon, and oxygen, an atomic ratio O/Si of oxygen relative to silicon in the lithium silicate phase is greater than 2 and less than 4, the electrolyte solution contains a halogenated benzene, and the amount of the halogenated benzene contained in the electrolyte solution is 1 ppm or more and 500 ppm or less. 2. The non-aqueous electrolyte secondary battery in accordance with claim 1 , wherein the lithium silicate phase has a composition represented by the following formula: Li 2z SiO 2+z , where z satisfies 0<z<2. 3. The non-aqueous electrolyte secondary battery in accordance with claim 2 , wherein z in the formula satisfies 0<z<1. 4. The non-aqueous electrolyte secondary battery in accordance with claim 1 , wherein the halogenated benzene contains at least one selected from the group consisting of chlorobenzene, dichlorobenzene, fluorobenzene, difluorobenzene, and hexafluorobenzene. 5. The non-aqueous electrolyte secondary battery in accordance with claim 1 , wherein the electrolyte solution contains a non-aqueous solvent and a lithium salt that is dissolved in the non-aqueous solvent, and the lithium salt contains at least one of LiN(SO 2 F) 2 and LiPF 6 . 6. The non-aqueous electrolyte secondary battery in accordance with claim 5 , wherein the LiN(SO 2 F) 2 concentration in the electrolyte solution is 0.1 mol/L or more and 1.0 mol/L or less. 7. The non-aqueous electrolyte secondary battery in accordance with claim 5 , wherein the LiPF 6 concentration in the electrolyte solution is 0.5 mol/L or more and 1.5 mol/L or less. 8. The non-aqueous electrolyte secondary battery in accordance with claim 6 , wherein the LiPF 6 concentration in the electrolyte solution is 0.5 mol/L or more and 1.5 mol/L or less. 9. The non-aqueous electrolyte secondary battery in accordance with claim 1 , wherein the halogenated benzene contains at least one selected from the group consisting of chlorobenzene and dichlorobenzene.
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Classifications
Organic electrolyte · CPC title
Negative electrodes · CPC title
characterised by the solutes · CPC title
characterised by the additives · CPC title
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
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- What does patent US12062789B2 cover?
- Disclosed is a non-aqueous electrolyte secondary battery including: a positive electrode; a negative electrode; and an electrolyte solution. The negative electrode contains a negative electrode active material that is capable of electrochemically absorbing and desorbing lithium. The negative electrode active material contains a lithium silicate phase and silicon particles that are dispersed in …
- Who is the assignee on this patent?
- Panasonic Ip Man Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M4/5825. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Aug 13 2024 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 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).