公开(公告)号：US20210135265A1

公开(公告)日：2021-05-06

申请号：US17088519

申请日：2020-11-03

申请人： Massachusetts Institute of Technology

发明人： Timothy Manning Swager ,  Jeffrey C. Grossman ,  Sibo Lin ,  Yoonseob Kim ,  Yanming Wang ,  Arthur France-Lanord ,  You-Chi Wu ,  Yifan Li ,  Yichong Wang

IPC分类号： H01M8/1032 ,  B01J47/12 ,  B01J41/07 ,  B01J41/13 ,  C08J5/22 ,  H01M8/1027

摘要： A major challenge in the development of anion exchange membranes for fuel cells is the design and synthesis of highly stable (chemically and mechanically) and conducting membranes. Membranes that can endure highly alkaline environments while rapidly transporting hydroxides are desired. A design for using cross-linked polymer membranes is disclosed to produce ionic highways along charge delocalized pyrazolium and homoconjugated triptycenes. The ionic highway membranes show improved performance in key parameters. Specifically, a conductivity of 111.6 mS cm−1 at 80° C. was obtained with a low 7.9% water uptake and 0.91 mmol g−1 ion exchange capacity. In contrast to existing materials, these systems have higher conductivities at reduced hydration and ionic exchange capacities, emphasizing the role of the highway. The membranes retain more than 75% of initial conductivity after 30 days of alkaline stability test. This effective water management through ionic highways is confirmed by density functional theory and Monte Carlo studies. A single cell with platinum group metal catalysts at 80° C. showed a high peak density of 0.73 W cm−2 (0.45 W cm−2 from silver-based cathode) and stable performance during 400 h tests.

公开(公告)号：US11658322B2

公开(公告)日：2023-05-23

申请号：US17088519

申请日：2020-11-03

申请人： Massachusetts Institute of Technology

发明人： Timothy Manning Swager ,  Jeffrey C. Grossman ,  Sibo Lin ,  Yoonseob Kim ,  Yanming Wang ,  Arthur France-Lanord ,  You-Chi Wu ,  Yifan Li ,  Yichong Wang

IPC分类号： H01M8/10 ,  B01J47/12 ,  B01J41/07 ,  C08J5/22 ,  B01J41/13 ,  H01M8/1032 ,  H01M8/1027

CPC分类号： H01M8/1032 ,  B01J41/07 ,  B01J41/13 ,  B01J47/12 ,  C08J5/2287 ,  H01M8/1027 ,  H01M2008/1095

摘要： A major challenge in the development of anion exchange membranes for fuel cells is the design and synthesis of highly stable (chemically and mechanically) and conducting membranes. Membranes that can endure highly alkaline environments while rapidly transporting hydroxides are desired. A design for using cross-linked polymer membranes is disclosed to produce ionic highways along charge delocalized pyrazolium and homoconjugated triptycenes. The ionic highway membranes show improved performance in key parameters. Specifically, a conductivity of 111.6 mS cm−1 at 80° C. was obtained with a low 7.9% water uptake and 0.91 mmol g−1 ion exchange capacity. In contrast to existing materials, these systems have higher conductivities at reduced hydration and ionic exchange capacities, emphasizing the role of the highway. The membranes retain more than 75% of initial conductivity after 30 days of alkaline stability test. This effective water management through ionic highways is confirmed by density functional theory and Monte Carlo studies. A single cell with platinum group metal catalysts at 80° C. showed a high peak density of 0.73 W cm−2 (0.45 W cm−2 from silver-based cathode) and stable performance during 400 h tests.