TY - JOUR
T1 - Oxygen- and proton-transporting open framework ionomer for medium-temperature fuel cells
AU - Yang, Jianwei
AU - Xu, Hengyu
AU - Li, Jie
AU - Gong, Ke
AU - Yue, Feiyu
AU - Han, Xianghao
AU - Wu, Ke
AU - Shao, Pengpeng
AU - Fu, Qingling
AU - Zhu, Yuhao
AU - Xu, Wenli
AU - Huang, Xin
AU - Xie, Jing
AU - Wang, Fengchao
AU - Yang, Wenxiu
AU - Zhang, Teng
AU - Xu, Zengshi
AU - Feng, Xiao
AU - Wang, Bo
PY - 2024/9/6
Y1 - 2024/9/6
N2 - Medium-temperature proton exchange membrane fuel cells (MT PEMFCs) operating at 100° to 120°C have improved kinetics, simplified thermal and water management, and broadened fuel tolerance compared with low-temperature PEMFCs. However, high temperatures lead to Nafion ionomer dehydration and exacerbate gas transportation limitations. Inspired by osmolytes found in hyperthermophiles, we developed α-aminoketone-linked covalent organic framework (COF) ionomers, interwoven with Nafion, to act as "breathable" proton conductors. This approach leverages synergistic hydrogen bonding to retain water, enhancing hydration and proton transport while reducing oxygen transport resistance. For commercial Pt/C, the MT PEMFCs achieved peak and rated power densities of 18.1 and 9.5 Watts per milligram of Pt at the cathode at 105°C fueled with H2 and air, marking increases of 101 and 187%, respectively, compared with cells lacking the COF.
AB - Medium-temperature proton exchange membrane fuel cells (MT PEMFCs) operating at 100° to 120°C have improved kinetics, simplified thermal and water management, and broadened fuel tolerance compared with low-temperature PEMFCs. However, high temperatures lead to Nafion ionomer dehydration and exacerbate gas transportation limitations. Inspired by osmolytes found in hyperthermophiles, we developed α-aminoketone-linked covalent organic framework (COF) ionomers, interwoven with Nafion, to act as "breathable" proton conductors. This approach leverages synergistic hydrogen bonding to retain water, enhancing hydration and proton transport while reducing oxygen transport resistance. For commercial Pt/C, the MT PEMFCs achieved peak and rated power densities of 18.1 and 9.5 Watts per milligram of Pt at the cathode at 105°C fueled with H2 and air, marking increases of 101 and 187%, respectively, compared with cells lacking the COF.
UR - http://www.scopus.com/inward/record.url?scp=85203420457&partnerID=8YFLogxK
U2 - 10.1126/science.adq2259
DO - 10.1126/science.adq2259
M3 - Article
C2 - 39236188
AN - SCOPUS:85203420457
SN - 0036-8075
VL - 385
SP - 1115
EP - 1120
JO - Science
JF - Science
IS - 6713
ER -