Stable cathode materials
US11424449B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 2019 |
| Grant date | Aug 23, 2022 |
| Priority date | — |
| Expiry date | Dec 27, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided are electrochemically active particles suitable for use as an active material in a cathode of a lithium ion electrochemical cell that include: a plurality of crystallites comprising a first composition comprising lithium, nickel, and oxygen; and a grain boundary between adjacent crystallites of the plurality of crystallites and comprising a second composition comprising lithium, nickel, and oxygen; wherein the grain boundary has a higher electrochemical affinity for lithium than the crystallites. The higher electrochemical affinity for Li leads to increased Li retention in the grain boundaries during or at charge relative to the bulk crystallites and stabilizes the structure of the grain boundaries and crystallites for improved cycling stability with no appreciable loss in capacity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.