Highly stable membrane–electrode assembly using ether-linkage-free spirobifluorene-based aromatic polyelectrolytes for direct formate solid alkaline fuel cells

2019 ◽  
Vol 438 ◽  
pp. 226997 ◽  
Author(s):  
Hidenori Kuroki ◽  
Shoji Miyanishi ◽  
Ayaka Sakakibara ◽  
Yuhei Oshiba ◽  
Takeo Yamaguchi
Keyword(s):  
Fuel Cells ◽  
Membrane Electrode Assembly ◽  
Membrane Electrode ◽  
Ether Linkage ◽  
Alkaline Fuel Cells

scholarly journals KOH-doped Porous Polybenzimidazole Membranes for Solid Alkaline Fuel Cells

Energies ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 525
Author(s):  
Jong-Hyeok Park ◽  
Jin-Soo Park
Keyword(s):  
Fuel Cells ◽  
Potassium Hydroxide ◽  
Peak Power ◽  
Dibutyl Phthalate ◽  
Membrane Electrode Assembly ◽  
Porous Membrane ◽  
Skin Layer ◽  
Membrane Electrode ◽  
Alkaline Fuel Cells ◽  
Dense Membrane

In this study the preparation and properties of potassium hydroxide-doped meta-polybenzimidazole membranes with 20–30 μm thickness are reported as anion conducting polymer electrolyte for application in fuel cells. Dibutyl phthalate as porogen forms an asymmetrically porous structure of membranes along thickness direction. One side of the membranes has a dense skin layer surface with 1.5–15 μm and the other side of the membranes has a porous one. It demonstrated that ion conductivity of the potassium hydroxide-doped porous membrane with the porogen content of 47 wt.% (0.090 S cm−1), is 1.4 times higher than the potassium hydroxide-doped dense membrane (0.065 S cm−1). This is because the porous membrane allows 1.4 times higher potassium hydroxide uptake than dense membranes. Tensile strength and elongation studies confirm that doping by simply immersing membranes in potassium hydroxide solutions was sufficient to fill in the inner pores. The membrane-electrode assembly using the asymmetrically porous membrane with 1.4 times higher ionic conductivity than the dense non-doped polybenzimidazole (mPBI) membrane showed 1.25 times higher peak power density.

Development of high-performance membrane-electrode assembly in unitized regenerative fuel cells

2019 ◽  
Vol 80 ◽  
pp. 527-534 ◽  
Author(s):  
Ji Eun Park ◽  
Mohanraju Karuppannan ◽  
Oh Joong Kwon ◽  
Yong-Hun Cho ◽  
Yung-Eun Sung
Keyword(s):  
Fuel Cells ◽  
High Performance ◽  
Membrane Electrode Assembly ◽  
Membrane Electrode

Highly stable nanostructured membrane electrode assembly based on Pt/Nb2O5nanobelts with reduced platinum loading for proton exchange membrane fuel cells

Nanoscale ◽  
2017 ◽  
Vol 9 (20) ◽  
pp. 6910-6919 ◽  
Author(s):  
Yachao Zeng ◽  
Xiaoqian Guo ◽  
Zhiqiang Wang ◽  
Jiangtao Geng ◽  
Hongjie Zhang ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Membrane Electrode Assembly ◽  
Proton Exchange ◽  
Membrane Electrode ◽  
Exchange Membrane ◽  
Platinum Loading
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