Poly(benzimidazole-co-benzoxazole) and method for preparing the same

• Main Authors: KIM HYOUNG-JUHN, LIM TAE HOON, HENKENSMEIER DIRK, CHO EUN AE, CHOI DAE KI, YOON CHANG WON, NAM SUK-WOO, JANG JONG HYUN
• Format: Patent
• Language: English
• Published: 15.12.2015
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THEIR PREPARATION OR CHEMICAL WORKING-UP

Provided is poly(benzimidazole-co-benzoxazole) having polybenzimidazole to which benzoxazole units are introduced, as a polymer electrolyte material. The polymer electrolyte material has both high proton conductivity and excellent mechanical properties even when it is obtained by in-situ phosphoric acid doping. The polymer electrolyte material may substitute for the conventional phosphoric acid-doped polybenzimidazole in a polymer electrolyte membrane fuel cell, particularly in a high-temperature polymer electrolyte membrane fuel cell.