Protected particles of cathode active materials for lithium batteries
US10886528B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2018 |
| Grant date | Jan 5, 2021 |
| Priority date | — |
| Expiry date | Nov 29, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided is a lithium battery cathode electrode comprising multiple particulates of a cathode active material, wherein at least a particulate comprises one or a plurality of particles of a cathode active material being encapsulated by a thin layer of a sulfonated elastomer, wherein the encapsulating thin layer of sulfonated elastomer has a thickness from 1 nm to 10 μm, a fully recoverable tensile strain from 2% to 800%, and a lithium ion conductivity from 10−7 S/cm to 5×10−2 S/cm. The encapsulating layer may further contain an electron-conducting additive and/or a lithium ion-conducting additive dispersed in the sulfonated elastomer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.