Matches in SemOpenAlex for { <https://semopenalex.org/work/W4292308111> ?p ?o ?g. }
- W4292308111 endingPage "21044" @default.
- W4292308111 startingPage "21028" @default.
- W4292308111 abstract "Temperature uniformity (TU) of the cathode catalyst layer (CCL) and the power density are two key parameters to describe a fuel cell durability and performance. To achieve desired TU and output performance, a one-dimensional, non-isothermal, two-phase model coupled with a CCL agglomerate submodel is developed and validated in terms of the polarization curve, ohmic impedance and total oxygen transport resistance. Then, the ideal ionomer-gradient distribution across the triple-layer CCL is attained by a combination of Non-dominated Sorting Genetic Algorithm II (NSGA II) and TOPSIS. The results present that the gradient-decline distribution of ionomer towards the microporous layer (MPL) contributes to the larger power density and effective utilization of ionomer. The fuel cell can also operate at higher power with a top voltage range (TVR). After optimization, the ideal ionomer-gradient distribution affects the distribution of the total heat source by affecting the local oxygen transport resistance across the ionomer film and the volumetric current density ( J c ). As a result, the maximum temperature point in CCL is more likely to occur near the MPL and the CCL temperature becomes more uniform. Besides, the optimum ionomer-gradient values tend to be different in various operating voltages and RH cases. However, low voltage and high RH conditions are more highly sensitive to the ionomer-gradient design. It is possible to maintain a proper TU and desired output performance by optimizing the CCL gradient structure, especially for the stationary PEMFC that operates with a particular condition for a long time. Research Highlights A 1D, non-isothermal, two-phase model is validated from multiple aspects. Multi-objective optimization is performed by combining the NSGA II and numerical model. More uniform CCL temperature and higher power density are achieved after optimization." @default.
- W4292308111 created "2022-08-19" @default.
- W4292308111 creator A5002967237 @default.
- W4292308111 creator A5036795285 @default.
- W4292308111 creator A5058716760 @default.
- W4292308111 creator A5089443893 @default.
- W4292308111 date "2022-08-16" @default.
- W4292308111 modified "2023-10-05" @default.
- W4292308111 title "Multi‐objective optimization of temperature uniformity in cathode catalyst layer and performance of <scp>PEMFC</scp> with an ionomer‐gradient design" @default.
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