Yamei You , Xinyang Deng , Qian Liu , Yanjun Hou , Shoulei Miao
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引用次数: 0
Abstract
Although phosphoric acid-doped PBI holds great promise for application in high-temperature proton exchange membrane fuel cells, the stabilities of phosphoric acid-doped membranes are compromised due to the low absorption capacity of phosphoric acid, poor solubility and difficulty in processing. In this study, by introducing poly (5-phenyl-1H-1,2,3-triazole) monomers into the polybenzimidazole main chains, a semi-flexible polybenzimidazole (PBI-QP) was prepared. The mechanical properties of PBI-QP membranes were better than that of PBI membrane. The tensile strength of PBI-QP-20 reached to 130.9 MPa. Compared with PBI, the solubility of PBI-QP has improved significantly. PBI-QP can be easily dissolved in the solvents of DMF, DMSO and formic acid separately at room temperature. All the membranes exhibited super thermal stability. At 800 °C there is still 72% quantity of residue and the thermal stability of PBI-QP can meet the thermal stability requirements of HT-PEMFCs. The membranes of PBI-QP demonstrated high phosphoric acid absorption (ADL 10.5) and enhanced antioxidant properties. The proton conductivity is 64.3 mS∙cm−1 at 170 °C and the peak power density attains an impressive level of 573.6 mW cm−2 at 180 °C. The results indicate that the synthesized HT-PEMs exhibit excellent solubility and impressive peak power density, underscoring their substantial promise for utilization in HT-PEMs.
期刊介绍:
The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc.
The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.