Method for producing secondary battery including coating on electrode surface
US-2018287208-A1 · Oct 4, 2018 · US
Method for improving lifetime of lithium-sulfur battery
US11646457B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11646457-B2 |
| Application number | US-201816628963-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 4, 2018 |
| Priority date | Jul 26, 2017 |
| Publication date | May 9, 2023 |
| Grant date | May 9, 2023 |
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Abstract
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A method for producing a lithium-sulfur battery with an improved lifetime. This method includes an activation step of forming a positive electrode active material-derived compound from a compound including elemental sulfur by charging and discharging the lithium-sulfur battery, where the battery includes the compound including elemental sulfur and an electrolyte liquid. Additionally, the positive electrode active material-derived compound has a solubility of 1% by weight or greater in the electrolyte liquid. The lithium-sulfur battery may be charged and discharged in a range of greater than 2.0 V and less than 2.4 V in the activation step. Further, the lithium-sulfur battery may be charged and discharged 3 times to 10 times in the activation step. This method avoids a complicated application process of and active material in preparing a lithium-sulfur battery.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for producing a lithium-sulfur battery with an improved lifetime, comprising: providing a positive electrode including a positive electrode active material formed on a positive electrode current collector, a negative electrode, an electrolyte liquid and a separator, wherein the positive electrode active material comprises a compound including elemental sulfur, and an activation step of forming a positive electrode active material-derived compound from the compound including elemental sulfur by charging and discharging the lithium-sulfur battery, wherein the positive electrode active material-derived compound has a solubility of 1% by weight or greater in the electrolyte liquid, wherein the lithium-sulfur battery is charged and discharged in a range of greater than 2.0 V and less than 2.4 V in the activation step, wherein the lithium-sulfur battery is charged and discharged at a 0.2 C-rate to a 5 C-rate in the activation step, wherein the lithium-sulfur battery is charged and discharged in a range of 3 times to 10 times in the activation step, and wherein the lithium-sulfur battery is charged and discharged 5 times or more from after the battery is manufactured to before the activation step. 2. The method of claim 1 , wherein the positive electrode active material-derived compound is a compound represented by Li 2 S n where n is from 4 to 8. 3. The method of claim 1 , wherein a potential difference in the charge and the discharge is greater than or equal to 0.1 V and less than 0.4 V in the activation step. 4. The method of claim 1 , wherein, in the lithium-sulfur battery, the electrolyte liquid comprises an aprotic solvent and a lithium salt. 5. The method of claim 4 , wherein the aprotic solvent is dioxolane, dimethyl ether, or a combination thereof. 6. The method of claim 4 , wherein the lithium salt is lithium imide. 7. The method of claim 1 , wherein the lithium-sulfur battery comprises 0.05 M to 1.0 M of the positive electrode active material-derived compound in the electrolyte liquid after the activation step.
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Classifications
Sulfides · CPC title
Li-accumulators · CPC title
Positive electrodes · CPC title
of elements or alloys · CPC title
characterised by the solvents · CPC title
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Frequently asked questions
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- What does patent US11646457B2 cover?
- A method for producing a lithium-sulfur battery with an improved lifetime. This method includes an activation step of forming a positive electrode active material-derived compound from a compound including elemental sulfur by charging and discharging the lithium-sulfur battery, where the battery includes the compound including elemental sulfur and an electrolyte liquid. Additionally, the positi…
- Who is the assignee on this patent?
- Lg Chemical Ltd, Lg Energy Solution Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M4/044. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue May 09 2023 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).