Electrolyte membrane including polyfluorene-based ionomer and manufacturing method thereof
AssigneesHyundai Motor Company, Kia Corporation, Industry-Academic Cooperation Foundation Gyeongsang National University
InventorsIl Seok Chae, Jong Kil Oh, Bo Ki Hong, Ki Hyun Kim, Soon Ki Kwon, Mi Jeong Kim, Han Sol Ko
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Abstract
The present disclosure to an electrolyte membrane containing a polyfluorene-based ionomer, and more particularly, to an electrolyte membrane containing a polyfluorene-based ionomer which has a fluorene main chain composed of only a carbon-carbon bond. The electrolyte membrane containing the polyfluorene-based ionomer has high proton conductivity, excellent chemical durability, excellent mechanical property, and excellent volume stability.
Claims12
An ionomer expressed as Formula 1a or Formula 1b:
- wherein, in each of Formulas 1a and 1b, R1=hydrogen or an alkyl group having a carbon number ranging from 1 to 3;
- R2=hydrogen or an alkyl group having a carbon number ranging from 1 to 3;
- R3=at least one among hydrogen, an unsubstituted alkyl group having a carbon number ranging from 1 to 3, and an alkyl group, which is substituted with a halogen element, having a carbon number ranging from 1 to 3;
- R4=an alkyl group having a carbon number ranging from 1 to 7;
- R5=at least one among an unsubstituted alkyl group having a carbon number ranging from 3 to 7, an alkyl group, which is substituted with a halogen, having a carbon number ranging from 3 to 7, and an ether group in which a part of carbon of the unsubstituted or substituted alkyl group is substituted with oxygen;
- each A is same or different, A is independently PO32-, PO42- or
- and n is an integer ranging from 10 to 2,000.
A manufacturing method of an ionomer, comprising:
- preparing a first precursor by reacting a hydrocarbon compound having a carbon number ranging from 2 to 10, which contains a fluorene-based monomer and a halogen element, in the presence of an acid catalyst;
- preparing a second precursor by reacting the first precursor with a phenolic compound;
- preparing an ionomer expressed as Formula 1a by reacting the second precursor with a substituent precursor:
- wherein in Formula 1a, R1=hydrogen or an alkyl group having a carbon number ranging from 1 to 3;
- R2=hydrogen or an alkyl group having a carbon number ranging from 1 to 3;
- R3=at least one among hydrogen, an unsubstituted alkyl group having a carbon number ranging from 1 to 3, and an alkyl group, which is substituted with a halogen element, having a carbon number ranging from 1 to 3;
- R4=an alkyl group having a carbon number ranging from 1 to 7;
- R5=at least one among an unsubstituted alkyl group having a carbon number ranging from 3 to 7, an alkyl group, which is substituted with a halogen, having a carbon number ranging from 3 to 7, and an ether group in which a part of carbon of the unsubstituted or substituted alkyl group is substituted with oxygen;
- each A is same or different, A is independently PO32-, PO42- or
- and n is an integer ranging from 10 to 2,000;
- preparing a polymer solution containing the ionomer and a solvent;
- and
- applying the polymer solution on a substrate to manufacture an electrolyte membrane.
Dependencies are inferred from the claim text.