.png){kind=icon}
.png){kind=icon}
Return
Conformation-Engineered Microphase Separation in Cross-Linked Polynorbornene AEMs
.png){kind=icon}
PRE
AI
S
Y
Y
G
G
J
L
L
DOI：10.1039/D6TA03304K.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
This study demonstrates the controlled self-assembly of hydrophilic-hydrophobic microdomains in cross-linked polynorbornene-based anion exchange membranes (AEMs) via strategic manipulation of polymer backbone conformation. In contrast to homopolymers prepared by ring-opening metathesis polymerization (ROMP) and subsequent hydrogenation of the single 5-norbornene-2-phenyl (NBPh) monomer; cross-linked AEMs (c-co-NBPh/NB-TMA) derived from a copolymer backbone of NBPh and norbornene (NB) simultaneously achieve high ionic conductivity and a low swelling ratio. This performance enhancement is attributed to flexible segments in the copolymer backbone; which improve chain rotational freedom and conformational adaptability; thereby facilitating the self-aggregation of ionic groups into microphase-separated structures for efficient ion transport. The optimized c-co-NBPh/NB-TMA-67 membrane exhibits an ionic conductivity of 110.8 mS cm-1 at 80 °C; a tensile strength of 20 MPa and elongation at break of 101% at room temperature; as well as a peak power density of 1.52 W cm-2 in single-cell tests. It also displays excellent alkaline stability; with negligible performance loss during the first 800 h of a 1200 h immersion in 1 M KOH at 80 °C.
Journal
J
IF:
0
Papers:
1.6K
Citations:
0
Organization
No organization information available
Cited Papers