Janus few layered graphene with asymmetric wettability as anti-flooding cathode supports in proton exchange membrane fuel cells
| Autor: | Xiaojin Li, Luhua Jiang, Jing Liu, Xiaoke Li |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Few layered graphene Proton exchange membrane fuel cell Anti-flooding 02 engineering and technology Chemical vapor deposition 010402 general chemistry Electrochemistry 01 natural sciences law.invention law Mass transfer lcsh:TA401-492 General Materials Science Janus Graphene 021001 nanoscience & nanotechnology Cathode 0104 chemical sciences Chemical engineering lcsh:Materials of engineering and construction. Mechanics of materials Wetting Support 0210 nano-technology |
| Zdroj: | Progress in Natural Science: Materials International, Vol 30, Iss 6, Pp 846-854 (2020) |
| ISSN: | 1002-0071 |
| Popis: | Water balance in cathode catalyst layer (CCL) is crucial for proton exchange membrane fuel cells (PEMFCs). Herein, we report a novel strategy to develop a Janus few layered graphene particles (FLGP) with asymmetric wettability by varying the carbon precursors in the chemical vapor deposition (CVD) process. Using the Janus FLGP supported Pt with asymmetric wettability as the cathode of a PEMFC, a peak power density of 632 mW cm−2 was achieved, which was about two-folds of the hydrophobic FLGP and three-folds of hydrophilic FLGP based cathode, respectively. The enhanced performance could be ascribed to the well-constructed three-phase boundary in an anti-flooding cathode, leading to enlarged electrochemical active surface area and facilitated mass transfer. This work may provide new clues for improving water management in PEMFCs. |
| Databáze: | OpenAIRE |
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