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Yuki Terayama - One of the best experts on this subject based on the ideXlab platform.
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Preparation of hydrophobic electrocatalyst Layer and inorganic porous Electrolyte Layer for water absorbing porous Electrolyte electrolysis cell
International Journal of Hydrogen Energy, 2018Co-Authors: Yuki Terayama, Shoichi Furukawa, Munemitsu Nomura, Takamasa Haji, Masamichi Nishihara, Omar Mendoza, Yoshitsugu Sone, Hiroshige MatsumotoAbstract:Abstract A water-absorbing porous Electrolyte electrolysis cell is presented consisting of a hydrophobic gas diffusion Layer (GDL), a controlled-hydrophobicity electrocatalyst Layer, and a hydrophilic porous Electrolyte Layer. The specific character of this cell is that high-pressure water is injected directly into the porous Electrolyte Layer and is resisted by the electrocatalyst Layer and GDL, which have strong water support force. In this study, the preparation method of the electrocatalyst Layer and the porous inorganic Electrolyte Layer, and the evaluation of water electrolysis using the prepared Layers were investigated. The optimized conditions and preparation methods of each Layer of the MEA (i.e. the GDL, electrocatalyst Layer, Electrolyte Layer) were determined. The assembly method and conditions of these three Layers were also determined for fabricating MEAs for water electrolysis. The evaluation of water electrolysis tests using this MEA showed that the hydrogen evolution rate obeyed Faraday's Law in the low current density region (
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carbon black ptfe composite hydrophobic gas diffusion Layers for a water absorbing porous Electrolyte electrolysis cell
International Journal of Hydrogen Energy, 2017Co-Authors: Yuki Terayama, Shoichi Furukawa, Munemitsu Nomura, Takamasa Haji, Masamichi Nishihara, Stephen Matthew Lyth, Yoshitsugu SoneAbstract:Abstract The characteristics of a water-absorbing porous Electrolyte electrolysis cell, in which pressurized water is injected directly into the Electrolyte Layer, are investigated. High water support force is required for the gas diffusion Layer (GDL) in this novel cell design, and therefore here we report a new type of hydrophobic GDL comprising an acetylene black (AB) and poly(tetrafluoroethylene) (PTFE) composite film. The method of preparation of the AB/PTFE slurry, film formation methods, and the AB/PTFE weight ratio were investigated and optimized. The ball-milling and transfer method were suitable for preparing uniform AB/PTFE slurry and successfully covering AB/PTFE film without any cracks on micro-porous Layer coated carbon paper, respectively. An investigation about different PTFE weight ratios against AB from 0.1 to 6 showed a serious trade-off character between electrical resistance R, gas permeability V′, and water support force Plim. The 1/2.5 of AB/PTFE weight ratio was most optimal, which showed to have most equivalent R (2.5 Ω cm−2), V′(136 mL atm−1 cm−2 min−1), and Plim (0.25 MPa). We also confirmed that fabricated GDL with optimal condition was worked as the blocking Layer against water injected through Electrolyte Layer and pressurized by nitrogen gas, and as gas-permeation Layer for generated hydrogen gas in water electrolysis test.
Yoshitsugu Sone - One of the best experts on this subject based on the ideXlab platform.
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Preparation of hydrophobic electrocatalyst Layer and inorganic porous Electrolyte Layer for water absorbing porous Electrolyte electrolysis cell
International Journal of Hydrogen Energy, 2018Co-Authors: Yuki Terayama, Shoichi Furukawa, Munemitsu Nomura, Takamasa Haji, Masamichi Nishihara, Omar Mendoza, Yoshitsugu Sone, Hiroshige MatsumotoAbstract:Abstract A water-absorbing porous Electrolyte electrolysis cell is presented consisting of a hydrophobic gas diffusion Layer (GDL), a controlled-hydrophobicity electrocatalyst Layer, and a hydrophilic porous Electrolyte Layer. The specific character of this cell is that high-pressure water is injected directly into the porous Electrolyte Layer and is resisted by the electrocatalyst Layer and GDL, which have strong water support force. In this study, the preparation method of the electrocatalyst Layer and the porous inorganic Electrolyte Layer, and the evaluation of water electrolysis using the prepared Layers were investigated. The optimized conditions and preparation methods of each Layer of the MEA (i.e. the GDL, electrocatalyst Layer, Electrolyte Layer) were determined. The assembly method and conditions of these three Layers were also determined for fabricating MEAs for water electrolysis. The evaluation of water electrolysis tests using this MEA showed that the hydrogen evolution rate obeyed Faraday's Law in the low current density region (
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carbon black ptfe composite hydrophobic gas diffusion Layers for a water absorbing porous Electrolyte electrolysis cell
International Journal of Hydrogen Energy, 2017Co-Authors: Yuki Terayama, Shoichi Furukawa, Munemitsu Nomura, Takamasa Haji, Masamichi Nishihara, Stephen Matthew Lyth, Yoshitsugu SoneAbstract:Abstract The characteristics of a water-absorbing porous Electrolyte electrolysis cell, in which pressurized water is injected directly into the Electrolyte Layer, are investigated. High water support force is required for the gas diffusion Layer (GDL) in this novel cell design, and therefore here we report a new type of hydrophobic GDL comprising an acetylene black (AB) and poly(tetrafluoroethylene) (PTFE) composite film. The method of preparation of the AB/PTFE slurry, film formation methods, and the AB/PTFE weight ratio were investigated and optimized. The ball-milling and transfer method were suitable for preparing uniform AB/PTFE slurry and successfully covering AB/PTFE film without any cracks on micro-porous Layer coated carbon paper, respectively. An investigation about different PTFE weight ratios against AB from 0.1 to 6 showed a serious trade-off character between electrical resistance R, gas permeability V′, and water support force Plim. The 1/2.5 of AB/PTFE weight ratio was most optimal, which showed to have most equivalent R (2.5 Ω cm−2), V′(136 mL atm−1 cm−2 min−1), and Plim (0.25 MPa). We also confirmed that fabricated GDL with optimal condition was worked as the blocking Layer against water injected through Electrolyte Layer and pressurized by nitrogen gas, and as gas-permeation Layer for generated hydrogen gas in water electrolysis test.
Masamichi Nishihara - One of the best experts on this subject based on the ideXlab platform.
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Preparation of hydrophobic electrocatalyst Layer and inorganic porous Electrolyte Layer for water absorbing porous Electrolyte electrolysis cell
International Journal of Hydrogen Energy, 2018Co-Authors: Yuki Terayama, Shoichi Furukawa, Munemitsu Nomura, Takamasa Haji, Masamichi Nishihara, Omar Mendoza, Yoshitsugu Sone, Hiroshige MatsumotoAbstract:Abstract A water-absorbing porous Electrolyte electrolysis cell is presented consisting of a hydrophobic gas diffusion Layer (GDL), a controlled-hydrophobicity electrocatalyst Layer, and a hydrophilic porous Electrolyte Layer. The specific character of this cell is that high-pressure water is injected directly into the porous Electrolyte Layer and is resisted by the electrocatalyst Layer and GDL, which have strong water support force. In this study, the preparation method of the electrocatalyst Layer and the porous inorganic Electrolyte Layer, and the evaluation of water electrolysis using the prepared Layers were investigated. The optimized conditions and preparation methods of each Layer of the MEA (i.e. the GDL, electrocatalyst Layer, Electrolyte Layer) were determined. The assembly method and conditions of these three Layers were also determined for fabricating MEAs for water electrolysis. The evaluation of water electrolysis tests using this MEA showed that the hydrogen evolution rate obeyed Faraday's Law in the low current density region (
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carbon black ptfe composite hydrophobic gas diffusion Layers for a water absorbing porous Electrolyte electrolysis cell
International Journal of Hydrogen Energy, 2017Co-Authors: Yuki Terayama, Shoichi Furukawa, Munemitsu Nomura, Takamasa Haji, Masamichi Nishihara, Stephen Matthew Lyth, Yoshitsugu SoneAbstract:Abstract The characteristics of a water-absorbing porous Electrolyte electrolysis cell, in which pressurized water is injected directly into the Electrolyte Layer, are investigated. High water support force is required for the gas diffusion Layer (GDL) in this novel cell design, and therefore here we report a new type of hydrophobic GDL comprising an acetylene black (AB) and poly(tetrafluoroethylene) (PTFE) composite film. The method of preparation of the AB/PTFE slurry, film formation methods, and the AB/PTFE weight ratio were investigated and optimized. The ball-milling and transfer method were suitable for preparing uniform AB/PTFE slurry and successfully covering AB/PTFE film without any cracks on micro-porous Layer coated carbon paper, respectively. An investigation about different PTFE weight ratios against AB from 0.1 to 6 showed a serious trade-off character between electrical resistance R, gas permeability V′, and water support force Plim. The 1/2.5 of AB/PTFE weight ratio was most optimal, which showed to have most equivalent R (2.5 Ω cm−2), V′(136 mL atm−1 cm−2 min−1), and Plim (0.25 MPa). We also confirmed that fabricated GDL with optimal condition was worked as the blocking Layer against water injected through Electrolyte Layer and pressurized by nitrogen gas, and as gas-permeation Layer for generated hydrogen gas in water electrolysis test.
Bin Zhu - One of the best experts on this subject based on the ideXlab platform.
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industrial grade rare earth triple doped ceria applied for advanced low temperature Electrolyte Layer free fuel cells
International Journal of Hydrogen Energy, 2017Co-Authors: Yanyan Liu, Muhammad Afzal, Chen Xia, Baoyuan Wang, Wei Zhang, Bin Zhu, Yuanjing MengAbstract:Abstract In this study, the mixed electron-ion conductive nanocomposite of the industrial-grade rare-earth material (La3+, Pr3+ and Nd3+ triple-doped ceria oxide, noted as LCPN) and commercial p-type semiconductor Ni0.8Co0.15Al0.05Li-oxide (hereafter referred to as NCAL) were studied and evaluated as a functional semiconductor-ionic conductor Layer for the advanced low temperature solid oxide fuel cells (LT-SOFCs) in an Electrolyte Layer-free fuel cells (EFFCs) configuration. The enhanced electrochemical performance of the EFFCs were analyzed based on the different semiconductor-ionic compositions with various weight ratios of LCPN and NCAL. The morphology and microstructure of the raw material, as-prepared LCPN as well the commercial NCAL were investigated and characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), and energy-dispersive X-ray spectrometer (EDS), respectively. The EFFC performances and electrochemical properties using the LCPN-NCAL Layer with different weight ratios were systematically investigated. The optimal composition for the EFFC performance with 70 wt% LCPN and 30 wt% NCAL displayed a maximum power density of 1187 mW cm−2 at 550 °C with an open circuit voltage (OCV) of 1.07 V. It has been found that the well-balanced electron and ion conductive phases contributed to the good fuel cell performances. This work further promotes the development of the industrial-grade rare-earth materials applying for the LT-SOFC technology. It also provides an approach to utilize the natural source into the energy field.
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enhanced ionic conductivity of yttria stabilized zro2 with natural cufe oxide mineral heterogeneous composite for low temperature solid oxide fuel cells
International Journal of Hydrogen Energy, 2017Co-Authors: Xunying Wang, Jing Zhang, Xiang Yang, Bin ZhuAbstract:Abstract We report for the first time that the commercial yttrium stabilized zirconia (YSZ) nanocomposite with a natural CuFe-oxide mineral (CF) exhibits a greatly enhanced ionic conductivity in the low temperature range (500–600 °C), e.g. 0.48 S/cm at 550 °C. The CF–YSZ composite was prepared via a nanocomposite approach. Fuel cells were fabricated by using a CF–YSZ Electrolyte Layer between the symmetric electrodes of the Ni0.8Co0.2Al0.5Li (NCAL) coated Ni foam. The maximum power output of 562 mW/cm2 has been achieved at 550 °C. Even the CF alone to replace the Electrolyte the device reached the maximum power of 281 mW/cm2 at the same temperature. Different ion-conduction mechanisms for YSZ and CF–YSZ are proposed. This work provides a new approach to develop natural mineral composites for advanced low temperature solid oxide fuel cells with a great marketability.
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lanthanum doped calcium manganite la0 1ca0 9mno3 cathode for advanced solid oxide fuel cell sofc
Materials Today: Proceedings, 2016Co-Authors: Muhammad Afzal, Chen Xia, Bin ZhuAbstract:Abstract We present here a new perovskite oxide with low lanthanum content doped in calcium manganite, La 0.1 Ca 0.9 MnO 3 (LCM) as a functional material for low temperature solid oxide fuel cell (LTSOFC) and Electrolyte-Layer free fuel cell (EFFC). The LCM introduces an intrinsic mixed-ion and electron conduction. Electrochemical impedance spectroscopy (EIS) analysis shows high oxygen reduction reaction (ORR) activity with an extremely low activation energy which enables an excellent cathode activity. Fuel cells using LCM as cathode with oxide ion conducting Electrolyte samarium doped ceria (SDC) and NCAL as an anode, demonstrate a maximum power density of 650 mW cm -2 at 550 °C, which is higher than most of the cathode materials reported for SOFC at this temperature. For EFFC, maximum power density of 750 mW cm -2 is achieved using LCM as a semiconductor material with SDC ion conducting material. The present work highlights the development of new active air electrode especially for developing low temperature solid oxide fuel cells.
Hiroshige Matsumoto - One of the best experts on this subject based on the ideXlab platform.
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Preparation of hydrophobic electrocatalyst Layer and inorganic porous Electrolyte Layer for water absorbing porous Electrolyte electrolysis cell
International Journal of Hydrogen Energy, 2018Co-Authors: Yuki Terayama, Shoichi Furukawa, Munemitsu Nomura, Takamasa Haji, Masamichi Nishihara, Omar Mendoza, Yoshitsugu Sone, Hiroshige MatsumotoAbstract:Abstract A water-absorbing porous Electrolyte electrolysis cell is presented consisting of a hydrophobic gas diffusion Layer (GDL), a controlled-hydrophobicity electrocatalyst Layer, and a hydrophilic porous Electrolyte Layer. The specific character of this cell is that high-pressure water is injected directly into the porous Electrolyte Layer and is resisted by the electrocatalyst Layer and GDL, which have strong water support force. In this study, the preparation method of the electrocatalyst Layer and the porous inorganic Electrolyte Layer, and the evaluation of water electrolysis using the prepared Layers were investigated. The optimized conditions and preparation methods of each Layer of the MEA (i.e. the GDL, electrocatalyst Layer, Electrolyte Layer) were determined. The assembly method and conditions of these three Layers were also determined for fabricating MEAs for water electrolysis. The evaluation of water electrolysis tests using this MEA showed that the hydrogen evolution rate obeyed Faraday's Law in the low current density region (