Ionomeric polymers useful as membranes and binders
AssigneesUchicago Argonne, LLC, The University of Chicago
InventorsChristopher G. ARGES, Paul F. NEALEY, Mincheol KIM, Chuan Pin CHEN
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Abstract
Described herein are fluorene-free or low-fluorine content ionomeric polymers with a hydrocarbon backbone and pendant phosphonic acid and sulfonic acid/sulfonimide groups. The polymers are useful as, e.g., high temperature polymer electrolyte membranes (HT-PEMs) for fuel cells, which do not require imbibed liquid acid in the membrane, as electrode binders (e.g., for fuel cell electrodes; as components of supercapacitors, and as membranes for waste heat recovery systems, and as membranes for hydrogen pumps for hydrogen separation. The HT-PEMs described herein can operate under hot (130 to 220° C.), dry conditions.
Claims25
A polymer of Formula (I):
- wherein
- A-R1—PO3H2 is a first repeating monomer unit;
- E-R2—SO2X1 is a second repeating monomer unit;
- A and E each independently comprises a first hydrocarbyl group;
- R1 and R2 each independently is a covalent bond or comprises a second hydrocarbyl group;
- X1 is selected from the group consisting of OH and NHSO2Z1;
- Z1 is selected from the group consisting of a third hydrocarbyl group and —PO3H2;
- x and y are the number of repeats of the first and second monomer units, respectively;
- and
- both x and y are greater than 0;
- wherein one or more of the first, second, and third hydrocarbyl groups optionally comprises (a) one or more halogen, oxygen-, nitrogen-, and/or sulfur-containing substituent;
- (b) one or more substitution of oxygen, nitrogen, and/or sulfur replacing a carbon of the hydrocarbyl group;
- or (c) both (a) and (b);
- and the polymer is fluorine-free or comprises no more than three fluorine substituents per monomer unit.
A polymer of Formula (I):
- wherein A-R1—PO3H2 is a first repeating monomer unit;
- E-R2—SO2X1 is a second repeating monomer unit;
- A and E each independently comprises a first hydrocarbyl group;
- R1 and R2 each independently is a covalent bond or comprises a second hydrocarbyl group;
- X1 is selected from the group consisting of OH and NHSO2Z1;
- Z1 is selected from the group consisting of a third hydrocarbon group and —PO3H2;
- x and y are the number of repeats of the first and second monomer units, respectively;
- and
- both x and y are greater than 0;
- wherein one or more of the first, second, and third hydrocarbyl groups optionally comprises (a) one or more halogen, oxygen-, nitrogen-, and/or sulfur-containing substituent;
- (b) one or more substitution of oxygen, nitrogen, and/or sulfur replacing a carbon of the hydrocarbyl group;
- or (c) both (a) and (b);
- the polymer is fluorine-free or comprises no more than three fluorine substituents per monomer unit;
- and wherein A and E together constitute a polymer backbone selected from the group consisting of a poly(arylene alkylene), a poly(norbornene), a polymer of intrinsic porosity, a cyclic polyolefin, a polyolefin, a polyimide, and a poly(arylene ether).
Dependencies are inferred from the claim text.