Search Results - "Yoshimune, Wataru"

Dependence of oxygen transport properties of catalyst layers for polymer electrolyte fuel cells on the fabrication process by Yoshimune, Wataru

“…[Display omitted] Herein, we report the oxygen transport phenomenon in the cathode catalyst layer of polymer electrolyte fuel cells. The oxygen transport…”
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Effect of Pt Loading on the Adsorption of Perfluoro-sulfonic Acid Ionomer in Catalyst Ink for Polymer Electrolyte Fuel Cells by Yoshimune, Wataru, Harada, Masashi

“…The interfacial structure of the perfluoro-sulfonic acid ionomer and Pt-loaded carbon in a catalyst ink significantly influences the properties of the catalyst…”
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Impact of Nonadsorbed Ionomer on Viscosity of Catalyst Inks for Polymer Electrolyte Fuel Cells by Yoshimune, Wataru, Harada, Masashi

“…In a catalyst ink for polymer electrolyte fuel cells (PEFCs), some of the ionomer is adsorbed on the carbon-supported Pt catalyst (Pt/C), which enhances the…”
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Temperature-induced shear-thinning in catalyst inks by Yoshimune, Wataru, Harada, Masashi

“…•Shear-thinning behavior was observed in catalyst inks at elevated temperatures.•Network structure was reversibly formed and collapsed with…”
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Ex-situ visualization of the wet domain in the microporous layer in a polymer electrolyte fuel cell by X-ray computed tomography under water vapor supply by Kato, Satoru, Yamaguchi, Satoshi, Yoshimune, Wataru, Matsuoka, Yoriko, Kato, Akihiko, Nagai, Yasutaka, Suzuki, Takahisa

“…[Display omitted] •Water vapor condensation in the GDL was investigated by ex-situ X-ray CT.•The MPL was visualized to be wetted heterogeneously.•It was…”
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Operando X-ray radiography of liquid water distribution in 100 mm polymer electrolyte fuel cell channels by Kato, Akihiko, Yamaguchi, Satoshi, Yoshimune, Wataru, Isegawa, Kazuhisa, Maeda, Masashi, Hayashi, Daisuke, Suzuki, Takahisa, Kato, Satoru

“…[Display omitted] •PEFC with channel length of 100 mm was developed for water visualization.•Water thickness in cathode and anode GDLs decreased toward cathode…”
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Interfacial Distribution of Nafion Ionomer Thin Films on Nitrogen-Modified Carbon Surfaces by Yoshimune, Wataru, Kikkawa, Nobuaki, Yoneyama, Hiroaki, Takahashi, Naoko, Minami, Saori, Akimoto, Yusuke, Mitsuoka, Takuya, Kawaura, Hiroyuki, Harada, Masashi, Yamada, Norifumi L., Aoki, Hiroyuki

“…Chemically modified carbon supports for the cathode catalyst layers of polymer electrolyte fuel cells (PEFCs) show considerable promise for boosting the oxygen…”
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Observation of water droplets in microporous layers for polymer electrolyte fuel cells by X‐ray computed nano‐tomography by Yamaguchi, Satoshi, Kato, Satoru, Yoshimune, Wataru, Setoyama, Daigo, Kato, Akihiko, Nagai, Yasutaka, Suzuki, Takahisa, Takeuchi, Akihisa, Uesugi, Kentaro

“…An X‐ray computed nano‐tomography (nano‐CT) system has been established at the BL33XU beamline of SPring‐8. The optical system consists of pseudo‐Köhler…”
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Liquid Water Visualization in the Pt‐Loading Cathode Catalyst Layers of Polymer Electrolyte Fuel Cells Using Operando Synchrotron X‐ray Radiography by Yoshimune, Wataru, Kato, Akihiko, Hayakawa, Tetsuichiro, Yamaguchi, Satoshi, Kato, Satoru

“…Water management is important for addressing the challenges posed by next‐generation fuel cell electric vehicles. Although X‐ray imaging techniques are useful…”
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Simultaneous accelerated stress testing of membrane electrode assembly components in polymer electrolyte fuel cells by Yoshimune, Wataru, Kato, Akihiko, Hayakawa, Tetsuichiro, Yamaguchi, Satoshi, Kato, Satoru

“…The durability of polymer electrolyte fuel cells (PEFCs) in fuel cell electric vehicles is important for the shift from passenger cars to heavy-duty vehicles…”
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Computer-aided determination of the effective diffusion coefficient of a gas diffusion layer for polymer electrolyte fuel cells by Inagaki, Masahide, Yoshimune, Wataru, Kato, Satoru

“…•An accurate method for determining the effective diffusion coefficient (Deff) of a GDL is proposed.•Three-dimensional (3D) simulations reproducing experiments…”
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Small-angle neutron scattering studies on the distribution of polytetrafluoroethylene within microporous layers for polymer electrolyte fuel cells by Yoshimune, Wataru, Harada, Masashi, Akimoto, Yusuke

“…•Contrast-variation small-angle neutron scattering was applied to elucidate studied the distribution of polytetrafluoroethylene within microporous layers for…”
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In Situ Small-Angle X‑ray Scattering Studies on the Growth Mechanism of Anisotropic Platinum Nanoparticles by Yoshimune, Wataru, Kuwaki, Akira, Kusano, Takumi, Matsunaga, Takuro, Nakamura, Hiroshi

“…Shape-controlled platinum nanoparticles exhibit extremely high oxygen reduction activity. Platinum nanoparticles were synthesized by the reduction of a…”
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The Role of Phosphate Functionalization on the Oxygen Evolution Reaction Activity of Cobalt‐Based Oxides at Different pH Values by Yoshimune, Wataru, Falqueto, Juliana B., Clark, Adam H., Yüzbasi, Nur Sena, Graule, Thomas, Baster, Dominika, El Kazzi, Mario, Schmidt, Thomas J., Fabbri, Emiliana

“…Cobalt‐based oxides have attracted attention as active electrocatalysts for the oxygen evolution reaction (OER) in alkaline electrolytes. However, highly OER…”
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Experimental visualization of water/ice phase distribution at cold start for practical-sized polymer electrolyte fuel cells by Higuchi, Yuki, Yoshimune, Wataru, Kato, Satoru, Hibi, Shogo, Setoyama, Daigo, Isegawa, Kazuhisa, Matsumoto, Yoshihiro, Hayashida, Hirotoshi, Nozaki, Hiroshi, Harada, Masashi, Fukaya, Norihiro, Suzuki, Takahisa, Shinohara, Takenao, Nagai, Yasutaka

“…The automotive industry aims to ensure the cold-start capability of polymer electrolyte fuel cells (PEFCs) for developing fuel cell electric vehicles that can…”
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A Partial Anion Disorder in SrVO2H Induced by Biaxial Tensile Strain by Namba, Morito, Takatsu, Hiroshi, Yoshimune, Wataru, Daniel, Aurélien, Itoh, Shoichi, Terashima, Takahito, Kageyama, Hiroshi

“…SrVO2H, obtained by a topochemical reaction of SrVO3 perovskite using CaH2, is an anion-ordered phase with hydride anions exclusively at the apical site. In…”
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Multiscale characterization of polymer electrolyte fuel cells elucidated by quantum beam analysis by Yoshimune, Wataru

“…Abstract Polymer electrolyte fuel cells (PEFCs) offer promising alternatives to conventional gasoline engines in automobiles and have been commercialized over…”
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A labile hydride strategy for the synthesis of heavily nitridized BaTiO3 by Yajima, Takeshi, Takeiri, Fumitaka, Aidzu, Kohei, Akamatsu, Hirofumi, Fujita, Koji, Yoshimune, Wataru, Ohkura, Masatoshi, Lei, Shiming, Gopalan, Venkatraman, Tanaka, Katsuhisa, Brown, Craig M., Green, Mark A., Yamamoto, Takafumi, Kobayashi, Yoji, Kageyama, Hiroshi

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Insights into Oxygen Transport Properties of Partially Saturated Gas Diffusion Layers for Polymer Electrolyte Fuel Cells by Yoshimune, Wataru, Yamaguchi, Satoshi, Kato, Satoru

“…A multimodal approach was used to investigate the oxygen transport resistance of gas diffusion layers (GDLs) for polymer electrolyte fuel cells (PEFCs) under…”
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Multi-scale pore morphologies of a compressed gas diffusion layer for polymer electrolyte fuel cells by Yoshimune, Wataru, Kato, Satoru, Yamaguchi, Satoshi

“…•A higher compressed gas diffusion layer showed the lower cell performance especially at high current densities.•The effect of compression on a gas diffusion…”
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