TY - JOUR
T1 - Sulfonated Triazine-Based Porous Organic Polymers for Excellent Proton Conductivity
AU - Li, Zhongping
AU - Liu, Zhaohan
AU - Li, He
AU - Hasan, Mdmahmudul
AU - Suwansoontorn, Athchaya
AU - Du, Gang
AU - Wang, Dongjin
AU - Zhang, Yuwei
AU - Nagao, Yuki
N1 - Funding Information:
Z.L. and Y.N. appreciate the support by JSPS KAKENHI grant numbers JP18J13699 and JP18K05257. Y.Z. acknowledges the support by the Natural Science Foundation of China (21805110).
Publisher Copyright:
Copyright © 2020 American Chemical Society.
PY - 2020/8/14
Y1 - 2020/8/14
N2 - Proton-exchange membrane fuel cells (PEMFCs) are a highly promising green and environmentally friendly way to serve the sustainable development of human civilization. However, high-cost synthesis and pollution problems of perfluorinated sulfonic acid membranes are still not resolved. In this research, we designed and constructed porous organic polymers (POPs) with high porosity and excellent stability via the Friedel-Crafts acylation reaction using commercial products as building blocks and low-cost FeCl3 as a catalyst through a simple operation. POP-BP-1 was successfully synthesized using 1,4-bis(chloromethyl)benzene as a cross-linking agent and reactant. POP-BP-TPOT was prepared using 2,4,6-Triphenoxy-1,3,5-Triazine (TPOT) as a building unit into the skeleton of POP-BP-1. Sulfonated POPs (S-POPs) were densely decorated with sulfonic acid groups by postsulfonation. POP-BP-TPOT with abundant triazine units and sulfonic acid groups showed high water uptake. The sulfonated triazine-based polymer showed excellent proton conductivity up to 10-2 S cm-1 at 95% relative humidity (RH) under 25 °C and low activation energy of 0.19 eV. Fuel-cell test was also demonstrated using the polymer. This research suggests that the construction of S-POPs opens a suitable method to design high proton-conducting materials.
AB - Proton-exchange membrane fuel cells (PEMFCs) are a highly promising green and environmentally friendly way to serve the sustainable development of human civilization. However, high-cost synthesis and pollution problems of perfluorinated sulfonic acid membranes are still not resolved. In this research, we designed and constructed porous organic polymers (POPs) with high porosity and excellent stability via the Friedel-Crafts acylation reaction using commercial products as building blocks and low-cost FeCl3 as a catalyst through a simple operation. POP-BP-1 was successfully synthesized using 1,4-bis(chloromethyl)benzene as a cross-linking agent and reactant. POP-BP-TPOT was prepared using 2,4,6-Triphenoxy-1,3,5-Triazine (TPOT) as a building unit into the skeleton of POP-BP-1. Sulfonated POPs (S-POPs) were densely decorated with sulfonic acid groups by postsulfonation. POP-BP-TPOT with abundant triazine units and sulfonic acid groups showed high water uptake. The sulfonated triazine-based polymer showed excellent proton conductivity up to 10-2 S cm-1 at 95% relative humidity (RH) under 25 °C and low activation energy of 0.19 eV. Fuel-cell test was also demonstrated using the polymer. This research suggests that the construction of S-POPs opens a suitable method to design high proton-conducting materials.
KW - porosity
KW - porous organic polymer
KW - proton conductivity
KW - stability
KW - water uptake
UR - http://www.scopus.com/inward/record.url?scp=85097344792&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85097344792&partnerID=8YFLogxK
U2 - 10.1021/acsapm.0c00425
DO - 10.1021/acsapm.0c00425
M3 - Article
AN - SCOPUS:85097344792
SN - 2637-6105
VL - 2
SP - 3267
EP - 3273
JO - ACS Applied Polymer Materials
JF - ACS Applied Polymer Materials
IS - 8
ER -