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Polybenzimidazole Confined in Semi-Interpenetrating Networks of Crosslinked Poly (Arylene Ether Ketone) for High Temperature Proton Exchange Membrane
| Content Provider | MDPI |
|---|---|
| Author | Qu, Erli Jiang, Junqiao Xiao, Min Han, Dongmei Huang, Sheng Huang, Zhiheng Wang, Shuanjin Meng, Yuezhong |
| Copyright Year | 2022 |
| Description | As a traditional high-temperature proton exchange membrane (HT-PEM), phosphoric acid (PA)-doped polybenzimidazole (PBI) is often subject to severe mechanical strength deterioration owing to the “plasticizing effect” of a large amount of PA. In order to address this issue, we fabricated the HT-PEMs with a crosslinked network of poly (arylene ether ketone) to confine polybenzimidazole in semi-interpenetration network using self-synthesized amino-terminated PBI $(PBI-4NH_{2}$) as a crosslinker. Compared with the pristine linear poly [2,2′-(p-oxdiphenylene)-5,5′-benzimidazole] (OPBI) membrane, the designed HT-PEMs (semi-IPN/xPBI), in the semi-IPN means that the membranes with a semi-interpenetration structure and x represent the combined weight percentage of $PBI-4NH_{2}$ and OPBI. In addition, they also demonstrate an enhanced anti-oxidative stability and superior mechanical properties without the sacrifice of conductivity. The semi-IPN/70PBI exhibits a higher proton conductivity than OPBI at temperatures ranging from 80 to 180 °C. The HT-PEMFC with semi-IPN/70PBI exhibits excellent $H_{2}/O_{2}$ single cell performance with a power density of 660 mW $cm^{−2}$ at 160 °C with flow rates of 250 and 500 mL $min^{−1}$ for dry $H_{2}$ and $O_{2}$ at a backpressure of 0.03 MPa, which is 18% higher than that of OPBI (561 mW $cm^{−2}$) under the same test conditions. The results indicate that the introduction of PBI containing crosslinked networks is a promising approach to improve the comprehensive performance of HT-PEMs. |
| Starting Page | 773 |
| e-ISSN | 20794991 |
| DOI | 10.3390/nano12050773 |
| Journal | Nanomaterials |
| Issue Number | 5 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-02-25 |
| Access Restriction | Open |
| Subject Keyword | Nanomaterials Polymer Science High-temperature Proton Exchange Membrane Semi-interpenetration Network Phosphoric Acid Poly [2,2′-(p-oxdiphenylene)-5,5′-benzimidazole] |
| Content Type | Text |
| Resource Type | Article |
