| Autor: |
Li YJ; School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, People's Republic of China., Li CX; Shandong Engineering Research Center of Green and High-value Marine Fine Chemicals, Weifang University of Science and Technology, Shouguang, Shandong 262700, China., Zhou SB; School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, People's Republic of China., Wei JY; School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, People's Republic of China., Fang Q; School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, People's Republic of China., Hu XL; School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, People's Republic of China., Liu BL; School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, People's Republic of China., Su ZM; School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, People's Republic of China.; State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130021, People's Republic of China. |
| Abstrakt: |
Proton exchange membrane fuel cells (PEMFCs) are developing into very meaningful clean energy to fundamentally address environmental pollution. Among which the most studied Nafion series membranes are limited under large-scale use, and some strong oxidizing groups such as hydrogen peroxide will attack the structure of Nafion, shortening the lifespan of PEMFCs. Therefore, it is crucial to develop a proton-conductive material with strong stability and broad application. In this study, a novel hourglass-type P 4 Mo 6 -based POMOFs denoted as (H 2 timb) 2 [Mn 3 (H 3 P 4 Mo 6 O 31 ) 2 ]·4H 2 O was synthesized using 1,3,5-tri(1 H -imidazole-1-yl)benzene (timb) as a ligand. It was found that CUST-577 exhibited an excellent proton conductivity of 8.9 × 10 -3 S cm -1 at 80 °C and 98% RH (relative humidity), proving that CUST-577 was conducted by protons. In addition, CUST-577 also had a greater H 2 O 2 decomposition ability, thereby improving the longevity of fuel cells. In a three-electrode system, CUST-577 displayed a specific capacitance (Cs) value of 308 F g -1 at a current density of 0.15 A g -1 , with a capacitance retention of 88.3% after 2000 cycles. Since the proton-conductive electrolyte can deliver protons for the redox reaction of various pseudocapacitor (PC) electrode materials, CUST-577 may be a promising polyacid-based proton conductor material and PC electrode material. |
