Porous membranes, freestanding composites, and related devices and methods
US11380961B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 15, 2018 |
| Grant date | Jul 5, 2022 |
| Priority date | — |
| Expiry date | Jan 28, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01M50/494
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The disclosed porous membranes and freestanding composites containing the porous membranes have a solution-cast three-dimensional polymer matrix defining interconnecting pores that provide overall first major surface-to-second major surface fluid permeability. The porous membranes and freestanding composites can be used to separate lead-acid battery electrodes. The porous membranes and freestanding composites can have high porosity and low electrical resistance while having both excellent flexibility and mechanical strength. This can reduce the probability of damage to the separators during battery assembly and also allow production of battery separators with a high overall height, but a minimal backweb thickness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.