Lim, Katie H. Lee, Albert S. Atanasov, Vladimir Kerres, Jochen Park, Eun Joo Adhikari, Santosh Maurya, Sandip Manriquez, Luis Delfin Jung, Ji Yoon Fujimoto, Cy Matanovic, Ivana Jankovic, Jasna Hu, Zhendong Jia, Hongfei Kim, Yu Seung 2024-01-12T03:32:21Z 2024-01-12T03:32:21Z 2022-03-08 2022-03 2058-7546 https://pubs.kist.re.kr/handle/201004/76788 High-temperature polymer electrolyte membrane fuel cells are promising for heavy-duty vehicle applications, but strides in performance are needed to improve their commercial viability. Here it is demonstrated that protonating phosphonic acid electrodes greatly enhances power density and durability.,State-of-the-art automotive fuel cells that operate at about 80 degrees C require large radiators and air intakes to avoid overheating. High-temperature fuel cells that operate above 100 degrees C under anhydrous conditions provide an ideal solution for heat rejection in heavy-duty vehicle applications. Here we report protonated phosphonic acid electrodes that remarkably improve the performance of high-temperature polymer electrolyte membrane fuel cells. The protonated phosphonic acids comprise tetrafluorostyrene-phosphonic acid and perfluorosulfonic acid polymers, where a perfluorosulfonic acid proton is transferred to the phosphonic acid to enhance the anhydrous proton conduction of fuel cell electrodes. By using this material in fuel cell electrodes, we obtained a fuel cell exhibiting a rated power density of 780 mW cm(-)(2) at 160 degrees C, with minimal degradation during 2,500 h of operation and 700 thermal cycles from 40 to 160 degrees C under load., English NATURE PUBLISHING GROUP Protonated phosphonic acid electrodes for high power heavy-duty vehicle fuel cells Article 10.1038/s41560-021-00971-x 1 Nature Energy, v.7, no.3, pp.248 - 259 Nature Energy 7 3 248 259 N scie scopus 000750299200001 2-s2.0-85123959450 Energy & Fuels Materials Science, Multidisciplinary Energy & Fuels Materials Science Article; Early Access CROSS-LINKED POLYBENZIMIDAZOLE MEMBRANES PERFORMANCE DURABILITY OPERATION HYDROGEN IONOMERS PEMFC