Proton exchange membranes (PEM) based on hybrid inorganic-organic copolymers with grafted phosphoric acid groups and implanted metal cations
US7811693B2 · kind B2 · utility
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Key dates
| Filing date | May 12, 2005 |
| Grant date | Oct 12, 2010 |
| Priority date | — |
| Expiry date | Aug 25, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A proton exchange membrane comprises a hybrid inorganic-organic polymer that includes implanted metal cations. Acid groups are bound to the hybrid inorganic-organic polymer through an interaction with the implanted metal cations. An example process for manufacturing a proton exchange membrane includes sol-gel polymerization of silane precursors in a medium containing the metal cations, followed by exposure of the metal-implanted hybrid inorganic-organic polymer to an acid compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.