2018
DOI: 10.1016/j.ijheatmasstransfer.2018.08.033
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EIS and local resolved current density distribution analysis on effects of MPL on PEMFC performance at varied humidification

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Cited by 59 publications
(14 citation statements)
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“…As well known, the transport of liquid water in the GDL mainly depends on microstructures and hydrophobicity of pores [5]. Various approaches have been adopted to optimize or modify the porous structures of the GDL for efficient water removal, such as addition of microporous layer (MPL) [7][8][9][10], polytetrafluoroethylene (PTFE) treatment [11][12][13] and usage of metal porous materials [14,15]. Shan et al [9] experimentally investigated the performance of GDL with/without MPL at different humidification conditions via a segmented cell technique.…”
Section: Introductionmentioning
confidence: 99%
“…As well known, the transport of liquid water in the GDL mainly depends on microstructures and hydrophobicity of pores [5]. Various approaches have been adopted to optimize or modify the porous structures of the GDL for efficient water removal, such as addition of microporous layer (MPL) [7][8][9][10], polytetrafluoroethylene (PTFE) treatment [11][12][13] and usage of metal porous materials [14,15]. Shan et al [9] experimentally investigated the performance of GDL with/without MPL at different humidification conditions via a segmented cell technique.…”
Section: Introductionmentioning
confidence: 99%
“…To enhance the water recovery from cathode to anode, a large number of researchers have focused on the optimization of the MEA structure, especially for the DMFCs operated at highly concentrated or neat methanol. The basic principle is to build up a hydraulic liquid pressure in the cathode CL. , To achieve this, various methods have been applied, which include optimizing the polytetrafluoroethylene (PTFE) content and carbon loadings in the cathode microporous layer, − introducing an additional hydrophobic layer, such as carbon paper or cloth, to the cathode gas diffusion layer (GDL). , With this design, more water can be transported back from the cathode to the anode, leading to a significant increase in the output performance. Another approach is to add a water retention layer consisting of superhydrophilic SiO 2 nanoparticles onto each side of the Nafion membrane, which helps to maintain a higher level of water concentration to enhance the water transportation to the anode.…”
Section: Introductionmentioning
confidence: 99%
“…For impedance spectra collected at medium and at high current density, one more parallel circuit is added in series with cathodic charge transfer resistance in order to model mass transfer limitations (i.e., diffusion resistances) which arise upon increasing current density because of a higher amount of produced liquid water. Constant phase elements (CPE) were employed, instead of pure capacitors, to consider the capacitive losses which take place in non‐ideal porous electrodes , .…”
Section: Methodsmentioning
confidence: 99%