High Performance Double Layer Ion Selective Membrane With Nanoporous Boron Nitride And Polyetherimide
OwnerHongli Zhuinventor
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Abstract
Disclosed herein is a double-layer ion-selective membrane, method of production, applications of the double-layer ion-selective membrane as a redox flow cell, a fuel cell, and used for wastewater and air purification. The double-layer ion-selective membrane is comprised of a polyetherimide (PEI) layer and an ultrathin layer comprising porous boron nitride (PBN) flakes enmeshed by a NAFION™ resin. The double layer membrane exhibits ion-selectivity and ion-conductivity enabling the membrane to be used in a redox flow cell battery, a fuel cell battery, and to be used in wastewater and air purification applications.
Claims20
A double-layer ion-selective membrane, comprising:
- a polyetherimide (PEI) layer having longitudinal unimpeded finger-like pores, and
- an ultrathin layer comprising porous boron nitride (PBN) flakes defining a tortuous path and enmeshed by a perfluorinated sulfonic acid ionomer resin that forms proton transfer channels created by the sulfonic acid groups of the perfluorinated sulfonic acid ionomer resin, the ultrathin layer coated on an open pore end of the PEI layer.
A method for producing a double-layer ion-selective membrane, the method comprising:
- dispersing flakes of porous boron nitrate (PBN) and perfluorinated sulfonic acid ionomer resin together in a solvent to produce a sprayable suspension of PBN flakes and the perfluorinated sulfonic acid ionomer resin;
- and
- spray coating the suspension of PBN flakes and the perfluorinated sulfonic acid ionomer resin in an amount sufficient to coat an ultrathin layer on an open pore side of a polyetherimide (PEI) membrane having longitudinal unimpeded finger-like pores, to produce a double-layer ion-selective membrane;
- wherein the double-layer ion-selective membrane comprises:
- a polyetherimide (PEI) layer having longitudinal unimpeded finger-like pores, and
- an ultrathin layer comprising porous boron nitride (PBN) flakes defining a tortuous path and enmeshed by a perfluorinated sulfonic acid ionomer resin that forms proton transfer channels created by the sulfonic acid groups of the perfluorinated sulfonic acid ionomers, the ultrathin layer coated on an open pore end of the PEI layer.
Dependencies are inferred from the claim text.