Porous film, separator including the same, electrochemical device including separator, and method of preparing porous film
US11211671B2 · kind B2 · utility
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15Claims
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Key dates
| Filing date | Nov 20, 2018 |
| Grant date | Dec 28, 2021 |
| Priority date | — |
| Expiry date | Mar 3, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249986
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided herein are a porous film, a separator including the same, an electrochemical device including the separator, and a method of preparing the porous film. The porous film includes first cellulose nanofibers which is impregnated with a carbonate-based solvent-containing electrolyte solution and has a reaction heat of 150 J/g or less at a temperature ranging from about 30° C. to about 300° C., as measured by differential scanning calorimetry (DSC).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.