US12021230B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12021230-B2 |
| Application number | US-202117495876-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 7, 2021 |
| Priority date | Feb 18, 2021 |
| Publication date | Jun 25, 2024 |
| Grant date | Jun 25, 2024 |
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
What the patent document calls the invention.
A short plain-language summary of the technical disclosure.
Who owns or filed the patent and who is credited as inventor.
Filing, priority, publication, and grant dates set the timeline.
The legal scope of protection — read this for what is actually claimed.
Technology tags used to group this patent with similar filings.
Prior art links and similar publications in this corpus.
Official abstract text for this publication.
Provided is a lithium secondary battery including a silicon-based anode active material for a lithium secondary battery and an anode formed using the same. The silicon-based anode active material for a lithium secondary battery according to exemplary embodiments includes a surface coated with carbon and doped with lithium. A ratio of a peak area at 102.5 eV to a total area of a peak area at 100 eV, the peak area at 102.5 eV, and a peak area at 104 eV, which appear in an Si2p spectrum when measuring by X-ray photoelectron spectroscopy (XPS), is 40% or less, thereby allowing an electrode to be stably manufactured without changing physical properties of the slurry during manufacturing the electrode. In addition, the anode active material for a secondary battery may be usefully used to manufacture a lithium secondary battery having high discharge capacity and high energy density characteristics.
Opening claim text (preview).
What is claimed is: 1. A silicon-based anode active material for a lithium secondary battery comprising a surface coated with carbon and doped with lithium, wherein a ratio of a peak area at 102.5 eV to a total area of a peak area at 100 eV, the peak area at 102.5 eV, and a peak area at 104 eV, which appear in an Si2p spectrum when measuring by X-ray photoelectron spectroscopy (XPS), is 40% or less. 2. The silicon-based anode active material for a lithium secondary battery according to claim 1 , wherein the carbon is coated in an amount of 2.0 to 5.0% by weight based on a total weight of the silicon-based anode active material. 3. The silicon-based anode active material for a lithium secondary battery according to claim 1 , wherein the lithium is doped in an amount of 3.5 to 9.5% by weight based on a total weight of the silicon-based anode active material. 4. The silicon-based anode active material for a lithium secondary battery according to claim 1 , wherein the silicon-based anode active material has a silicon crystal grain size of 20 nm or less. 5. The silicon-based anode active material for a lithium secondary battery according to claim 1 , wherein the silicon-based anode active material comprises SiOx and x=0.8 to 1.2. 6. A lithium secondary battery comprising: a cathode; an anode comprising the silicon-based anode active material for a lithium secondary battery according to claim 1 ; and a separation membrane interposed between the cathode and the anode.
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
Carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title
involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis · CPC title
Particles consisting of a mixture of two or more inorganic phases · CPC title
one element only · CPC title
Related publications grouped by family.
Answers are generated from the same data shown on this page.