Affiliation |
Faculty of Engineering, Division of Systems Research |
Job Title |
Professor |
Date of Birth |
1975 |
Education 【 display / non-display 】
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-2003
Kyoto University Department of Mechanical Engineering Doctor Course Completed
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-2000
Kyoto University Department of Mechanical Engineering Master Course Completed
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-1998
Kyoto University Department of Engineering Science
Degree 【 display / non-display 】
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Doctor of Engineering - Kyoto University
Campus Career 【 display / non-display 】
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2020.4
Duty Yokohama National UniversityFaculty of Engineering Division of Systems Research Professor
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2007.4-2020.3
Duty Yokohama National UniversityFaculty of Engineering Division of Systems Research Associate Professor
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2021.4
Concurrently Yokohama National UniversityInterfaculty Graduate School of Innovative and Practical Studies Professor
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2020.10
Concurrently Yokohama National UniversityInstitute of Advanced Sciences Professor
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2020.4
Concurrently Yokohama National UniversityGraduate School of Engineering Department of Systems Integration Professor
External Career 【 display / non-display 】
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2004.1-2007.3
Toyohashi University of Technology Department of Electrical and Electronic Engineering Research Assistant
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2003.7-2003.12
JSPS Postdoc, University of California Los Angels Special researcher of the Japan Society for the Promotion of Science
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2002.4-2003.6
JSPS Postdoc, Kyoto University, Fuclty of Engineering, Department of Mechanical Engineering
Academic Society Affiliations 【 display / non-display 】
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The Heat Transfer Society of Japan
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The Japan Society of Mechanical Engineers
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The Electrochemical Society of Japan
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The Institute of Electrical Engineers of Japan
Research Areas 【 display / non-display 】
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Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Fluid engineering
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Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Thermal engineering
Books 【 display / non-display 】
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マイクロ・ナノ熱工学の進展
荒木拓人 他( Role: Joint author)
エヌ・ティー・エス ( ISBN:978-4-86043-722-0 )
Language:Japanese Book type:Scholarly book
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Fuel Cells and Hydrogen: From Fundamentals to Applied Research
Viktor Hacker, Shigenori Mitsushima et al.( Role: Sole author)
Elsevier ( ISBN:0128114592 )
Language:English Book type:General book, introductory book for general audience
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Advanved Studies of Polymer Electrolyte Fuel Cells
Shigenori Mitsushima, Takuto Araki, Ken-ichiro Ota, Viktor Hacker, Matthuasus Siebenhofer( Role: Joint author)
TU Graz
Total pages:122 Language:English Book type:Scholarly book
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LiBの高容量・高耐久化のための電極-電解液(質)の界面制御技術と解析・評価法
荒木拓人 他104名( Role: Joint author , 第3章2節を担当.)
技術情報協会
Language:Japanese Book type:Scholarly book
リチウムイオンバッテリーの発熱特性の評価要因としてのインピーダンス測定法について具体例を用いながら解説した.
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電気化学/インピーダンス測定のノウハウと正しいデータ解釈
荒木拓人 他 97名( Role: Joint author , 第2章第2節第23項を担当)
技術情報協会
Language:Japanese Book type:Scholarly book
リチウムイオン二次電池のインピーダンス測定の実際について,実例を交えながら解説した.特に二次電池は測定中に内部状態(SOC)が変化するため,定電流測定の結果をSOCごとに整理することで簡便に正確なインピーダンスを測定できることを示した.
Thesis for a degree 【 display / non-display 】
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マイクロスケール流路内の気体の熱流動特性
荒木 拓人
2003.3
Doctoral Thesis Single Work
京都大学 工学研究科
マイクロスケール流れにおける熱流動特性を実験と解析両面から包括的に明らかにした。 -
マイクロチャネル内気体流れの圧力損失特性に関する実験的研究
荒木 拓人
2000.3
Master Thesis Single Work
京都大学 工学研究科
マイクロチャネル内流れの摩擦特性について実験的に明らかにした。
Papers 【 display / non-display 】
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Convolutional neural networks-based red blood cell detection and tracking with automatic data generation
Kohei TOYAMA, Tomoki MIZUNO, Takuto ARAKI, Toru HYAKUTAKE
Journal of Biomechanical Science and Engineering 20 ( 2 ) 2025.3 [Reviewed]
Language:English Publishing type:Research paper (scientific journal) Joint Work
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Reyna-Peña, FI; Atienza-Márquez, A; Jang, S; Shigemasa, K; Shiono, R; Nagasawa, K; Araki, T; Mitsus … Show more authors
Reyna-Peña, FI; Atienza-Márquez, A; Jang, S; Shigemasa, K; Shiono, R; Nagasawa, K; Araki, T; Mitsushima, S Hide authors
RENEWABLE ENERGY 240 2025.2
Language:English Publishing type:Research paper (scientific journal) Joint Work
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Toyama, K; Kanemoto, R; Misumi, R; Araki, T; Mitsushima, S
ELECTROCHEMISTRY 93 ( 2 ) 2025.2
Language:English Publishing type:Research paper (scientific journal) Joint Work
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Kanemoto, R; Araki, T; Misumi, R; Mitsushima, S
CHEMICAL ENGINEERING SCIENCE 304 2025.2 [Reviewed]
Language:English Publishing type:Research paper (scientific journal) Joint Work
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Kunpeng Li, Takeru Murakami, Yohei Nagata, Yuichi Mikami, Kosuke Yamauchi, Tomohiro Kuroha, Yuji Ok … Show more authors
Kunpeng Li, Takeru Murakami, Yohei Nagata, Yuichi Mikami, Kosuke Yamauchi, Tomohiro Kuroha, Yuji Okuyama, Yasunobu Mizutani, Masashi Mori, Takuto Araki Hide authors
Applied Energy 381 2024.12 [Reviewed]
Language:English Publishing type:Research paper (scientific journal) Joint Work
Review Papers 【 display / non-display 】
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MISUMI Ryuta, KURODA Yoshiyuki, ARAKI Takuto, MITSUSHIMA
JAPANESE JOURNAL OF MULTIPHASE FLOW 39 ( 1 ) 18 - 25 2025.3
Language:Japanese Publishing type:Article, review, commentary, editorial, etc. (scientific journal) Joint Work
<p>Alkaline water electrolysis (AWE) has attracted significant attention for producing hydrogen. One of the problems with AWE is the increase in overpotential, which is attributed to bubbles covering the electrode surface at high current densities. Therefore, understanding the relationship between the bubble formation behavior and reactant transfer mechanism is important for reducing the overpotential. In this study, an <i>operando</i> observation system for the oxygen and hydrogen bubble formation behavior on nickel wire electrodes was developed using a microscope-type high-speed video camera. The relationship between the current density-electrode potential curve and bubble generation behavior was then investigated. The results showed that the generation of oxygen/hydrogen bubbles was activated as current density increased. At a high current density, bubbles covered the electrode surface, and the overpotential increased. Electrochemical impedance spectroscopy (EIS) measurements were performed to analyze the resistance components of the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER). The EIS results showed that the diffusion rate of hydroxide ions through the bubble-covering layer on the anode can be modeled by the Warburg impedance with a finite diffusion boundary. The migration rate of ions driven by the potential gradient in OER and HER was modeled by a tortuosity model with void fraction and bubble-covering layer thickness. A method for promoting bubble detachment via the addition of tert-butyl alcohol and external magnetic fields was introduced. Finally, a computational fluid dynamics (CFD) simulation of the gas-liquid two-phase flow and a deep-learning analysis method for the size distribution of crowded bubbles in an electrolysis cell were introduced.</p>
<p>Alkaline water electrolysis (AWE) has attracted significant attention for producing hydrogen. One of the problems with AWE is the increase in overpotential, which is attributed to bubbles covering the electrode surface at high current densities. Therefore, understanding the relationship between the bubble formation behavior and reactant transfer mechanism is important for reducing the overpotential. In this study, an <i>operando</i> observation system for the oxygen and hydrogen bubble formation behavior on nickel wire electrodes was developed using a microscope-type high-speed video camera. The relationship between the current density-electrode potential curve and bubble generation behavior was then investigated. The results showed that the generation of oxygen/hydrogen bubbles was activated as current density increased. At a high current density, bubbles covered the electrode surface, and the overpotential increased. Electrochemical impedance spectroscopy (EIS) measurements were performed to analyze the resistance components of the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER). The EIS results showed that the diffusion rate of hydroxide ions through the bubble-covering layer on the anode can be modeled by the Warburg impedance with a finite diffusion boundary. The migration rate of ions driven by the potential gradient in OER and HER was modeled by a tortuosity model with void fraction and bubble-covering layer thickness. A method for promoting bubble detachment via the addition of tert-butyl alcohol and external magnetic fields was introduced. Finally, a computational fluid dynamics (CFD) simulation of the gas-liquid two-phase flow and a deep-learning analysis method for the size distribution of crowded bubbles in an electrolysis cell were introduced.</p>
Awards 【 display / non-display 】
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2020 日本冷凍空調学会 霜層微細構造に及ぼす冷却面性状の影響
Individual or group name of awards:松本 亮介, 西浦 雄人, 塩川 貴大, 槇原 拓郎, 小田 豊, 清水 智弘, 依岡 拓也, 荒木 拓人
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電気学会優秀論文発表賞
2008.3
Other external funds procured 【 display / non-display 】
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超高効率プロトン伝導セラミック燃料電池デバイスの研究開発
2020.7 - 2022.6
Investigator(s):荒木拓人
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粉体成膜プロセス研究のハイスループット化のためのデータ駆動型プロセス・インフォマティクス
2019.11 - 2021.5
Japan Science and Technology Agency 未来社会創造事業
Investigator(s):荒木拓人
Presentations 【 display / non-display 】
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OBSERVATION OF CONDENSATE DROPS FREEZING ON MICRO STRUCTURED METAL SURFACES PROCESSED BY WET ETCHING
Kota Asaoka, Shoki Inoue, Tatsuya Mizusawa and Takuto Araki
The 32nd International Symposium on Transport Phenomena
Event date: 2022.3
Language:English Presentation type:Oral presentation (general)
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THREE-DIMENSIONAL ELECTRIC POTENTIAL SIMULATION WITH VARIOUS ELECTRODE GEOMETRIES IN PEM WATER ELECTROLYSIS
Naruhisa Tsukase, Konosuke Watanabe, Takuto Araki, Taiki Ishida, Kensaku Nagasawa, Yoshiyuki Kuroda and Shigenori Mitsushima
The 32nd International Symposium on Transport Phenomena
Event date: 2022.3
Language:English Presentation type:Oral presentation (general)
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In Situ X-Ray Diffraction Study of Iridium Crystalline Structure Under Working Conditions of Proton Exchange Membrane Water Electrolysis
K Shigemasa, M Shviro, Y Kuroda, S Mitsushima, M Carmo, T Araki
ECS Meeting
Event date: 2021.10
Language:English Presentation type:Oral presentation (general)
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Observation of Oxygen Bubble Growth near Anode Catalyst Electrode in PEM Water Electrolyzer
Konosuke Watanabe, Kohei Wakuda, Kodai Wani, Takuto Araki, Kensaku Nagasawa, Shigenori Mitsushima
ECS Meeting
Event date: 2021.10
Language:English Presentation type:Oral presentation (general)
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MEMS sensor development for making PEFC catalyst layer during drying process
Yoshifumi Hyugaji, Takuto Araki (Yokohama National University, Faculty of Engineering), Keisuke Nagato, Kohei Nagai, Takuya Tsujiguchi, Kota Asaoka, Daichi Suzuki
The 2nd Asian Conference on Thermal Sciences 2021.10
Event date: 2021.10
Language:English Presentation type:Oral presentation (general)
Charge of on-campus class subject 【 display / non-display 】
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2025 Fluid Dynamics 1
College of Engineering Science
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2025 Exercises in Mechanics for Mechanical Engineering II
College of Engineering Science
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2025 Exercises in Mechanics Ⅱ
College of Engineering Science
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2025 Applied Thermofluid Engineering Ⅱ
Interfaculty Graduate School of Innovative and Practical Studies
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2025 Applied Thermofluid Engineering Ⅰ
Interfaculty Graduate School of Innovative and Practical Studies