Triple microporous layer coated gas diffusion layer for performance enhancement of polymer electrolyte fuel cells under both low and high humidity conditions

Kitahara, Tatsumi; Nakajima, Hironori; Inamoto, Masaoki; Shinto, Kosuke

doi:10.1016/j.jpowsour.2013.10.066

Cited by 81 publications

(52 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This phenomenon can lead to water flooding, above all at high current densities values. Thus, GDM is necessary in order to guarantee the correct balance between external water from humidifiers and internal generated water [12,14,15,[18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…Instead, MPLs are thin hydrophobic microporous layers coated onto the GDLs surface, prepared starting from aqueous dispersions of carbon black and polymer binders such as polytetrafluoroethylene (PTFE) particles. 201400054 MPL layers enhance water removal and gas permeability [12,15,16], improve the smoothness of the GDL surface, allowing a better contact with the catalytic layer and reducing contact resistances [21]. Indeed, MPLs have been recently employed to reduce mass transport limitations, which are due to water flooding, and to improve performances, especially in the high current density region [12,16,[22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

“…Indeed, MPLs have been recently employed to reduce mass transport limitations, which are due to water flooding, and to improve performances, especially in the high current density region [12,16,[22][23][24][25][26][27]. On the other hand if the electrolytic membrane was dehydrated, the performance of the fuel cell would decrease because ionic conductivity of the proton membrane is strongly dependant on water content [15,28,29]. Therefore, a right balance between water supply and removal is fundamental for PEMFCs performance.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Preparation, ex situ and in situ Characterization of Gas Diffusion Media Containing and Non‐Containing Carboxymethylcellulose for PEM Fuel Cells

et al. 2015

View full text Add to dashboard Cite

In this paper the effect of the addition of carboxymethylcellulose (CMC) to microporous layers (MPLs) formulation is reported and the rheological, morphological and electrical properties of the so-obtained MPLs are assessed. Two different PTFE/carbon black ratios are considered, with and without CMC in the ink formulation. CMC addition results in a better homogeneity and stability of the inks. Moreover, the presence of CMC leads to a better shear thinning behaviour and to a general increase in viscosity that makes these slurries more appropriate for coating deposition via doctor blade technique. The presence of CMC in MPL formulation also affects the electrochemical performances in terms of I-V curves and impedance spectra. CMC-containing MPLs show the best performances in terms of generated power at high temperature (80°C) and low cathodic relative humidity (RH 60 %). Ohmic resistances too, in presence of CMC, are lower than those exhibited by CMC-free MPLs.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Preparation, ex situ and in situ Characterization of Gas Diffusion Media Containing and Non‐Containing Carboxymethylcellulose for PEM Fuel Cells

et al. 2015

View full text Add to dashboard Cite

show abstract

“…A novel GDL with triple MPLs was studied by Kitahara et al [157]. The three MPLs include two hydrophobic layers and one hydrophilic layer, and the hydrophilic layer was coated on the double hydrophobic MPLs.…”

Section: Gdl Structure Optimization and Novel Gdlsmentioning

confidence: 99%

Recent Progress on the Key Materials and Components for Proton Exchange Membrane Fuel Cells in Vehicle Applications

Wang

Peng

et al. 2016

Energies

View full text Add to dashboard Cite

Fuel cells are the most clean and efficient power source for vehicles. In particular, proton exchange membrane fuel cells (PEMFCs) are the most promising candidate for automobile applications due to their rapid start-up and low-temperature operation. Through extensive global research efforts in the latest decade, the performance of PEMFCs, including energy efficiency, volumetric and mass power density, and low temperature startup ability, have achieved significant breakthroughs. In 2014, fuel cell powered vehicles were introduced into the market by several prominent vehicle companies. However, the low durability and high cost of PEMFC systems are still the main obstacles for large-scale industrialization of this technology. The key materials and components used in PEMFCs greatly affect their durability and cost. In this review, the technical progress of key materials and components for PEMFCs has been summarized and critically discussed, including topics such as the membrane, catalyst layer, gas diffusion layer, and bipolar plate. The development of high-durability processing technologies is also introduced. Finally, this review is concluded with personal perspectives on the future research directions of this area.

show abstract

“…の有無や塗布量 (Atiyeh, et al, 2007, Park, et al, 2006, Qi and Kaufman, 2002)，MPL 中の撥水材や親水材の成分比 (Kitahara, et al, 2010, Park, et al, 2008)によるセル性能への影響も検証されている．これら，GDL 性の異なる MPL を積層することによる湿分管理が試みられている (Kitahara, et al, 2013(Kitahara, et al, , 2014)．また，GDL の平面方向にぬれ性分布の付与による液水移動制御を行うことにより酸素拡散促進が提案されている (Koresawa andUtaka, 2014, Utaka, et al, 2011)．また，ガス流路に関する研究として，流路形状の変更などによる PEFC の性能向上に関する検討が行われている．流路の形状として，例えば，並行流路，サーペイン形流路，対向櫛形流路などがあり，これらを複合した流路形状を含め，様々な流路形状に関する研究がなされている (Choi, et al, 2011, Hsieh, et al, 2006, Li, et al, 2007, Nguyen, 1996, Shimpalee, et al, 2006)．これら流路形状に関する研究の他にも，毛管力による液滴のアクチュエーションを用いた特殊なガスチャネル構造に関する研究 (Metz, et al, 2008)やチャネル壁面のぬれ性の影響 )に関する研究も行われている． (Chang, et al, 2007, Lee, et al, 1999, Ous and Arcoumanis, 2007 …”

Section: や，マイクロポーラス層(Mpl)unclassified

Improvement of performance of polymer electrolyte fuel cell due to addition of micro-grooves as water removal mechanism

Koresawa

Utaka

2015

Transactions of the JSME (In Japanese)

View full text Add to dashboard Cite

Although polymer electrolyte fuel cells (PEFCs) have become commercially available, many problems remain to further improve the performance of PEFC and to popularize PEFCs. Water management in PEFC is closely related to cell performance. At high current density, generated water accumulates in gas diffusion layer and in gas channels of cathode, and the excessive water obstructs oxygen transport. The cell performance greatly decreases by blocking the oxygen transport. In order to improve the cell performance, it is necessary to remove effectively the generated water. In this study, to improve the water management in gas channels, novel gas channel with micro-grooves, which are manufactured inside gas channel walls, is adopted. The generated water from gas diffusion layer is removed through the micro-grooves to opposite-side of gas channel by the forces of capillary and shearing generated by air flow. The performance of the PEFC with and without micro-grooves was examined in various experimental conditions. Therefore, the cell performance was examined by changing the cell temperature, relative humidity of gas and air velocity. As the result, it was shown that the PEFC with micro-grooves showed higher performance than the conventional PEFC without grooves. Especially, the value of maximum current density was increased by about 23% when air velocity is 8.0m/s.

show abstract

Triple microporous layer coated gas diffusion layer for performance enhancement of polymer electrolyte fuel cells under both low and high humidity conditions

Cited by 81 publications

References 16 publications

Preparation, ex situ and in situ Characterization of Gas Diffusion Media Containing and Non‐Containing Carboxymethylcellulose for PEM Fuel Cells

Preparation, ex situ and in situ Characterization of Gas Diffusion Media Containing and Non‐Containing Carboxymethylcellulose for PEM Fuel Cells

Recent Progress on the Key Materials and Components for Proton Exchange Membrane Fuel Cells in Vehicle Applications

Improvement of performance of polymer electrolyte fuel cell due to addition of micro-grooves as water removal mechanism

Contact Info

Product

Resources

About