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MITSUSHIMA Shigenori
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Yokohama National University Department of Material Engineering Master Course Completed
Yokohama National University Department of Material Chemistry Graduated
Doctor in Engineering - Yokohama National University
Duty Yokohama National UniversityFaculty of Engineering Division of Materials Science and Chemical Engineering Professor
Duty Yokohama National UniversityFaculty of Engineering Division of Materials Science and Chemical Engineering Associate Professor
Duty Yokohama National UniversityFaculty of Engineering Division of Materials Science and Chemical Engineering Associate Professor
Duty Yokohama National UniversityFaculty of Engineering Division of Materials Science and Chemical Engineering Research Assistant
Duty Yokohama National UniversitySchool of Engineering Research Assistant
Ecole Polytechnique de Montreal Invited Researcher
Hitachi Research Laboratory, Hitachi Ltd Researcher
Hitachi Research Laboratory, Hitachi Ltd
The Hydrogen Energy System Society of Japan
The Electrochemical Society
The Electrochemical Society of Japan
Nanotechnology/Materials / Inorganic materials and properties
Nanotechnology/Materials / Inorganic compounds and inorganic materials chemistry
Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Chemical reaction and process system engineering
Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Electron device and electronic equipment
有機ハイドライド電解合成
The Other Research Programs
Project Year： 2013.4
アルカリ水電解用アノード
The Other Research Programs
Project Year： 2011.4
New Material for Molten Carbonate Fuel Cells
New Sunshine Program New Sunshine Project
Project Year：
Design of the Pseudo-3D Interface for Electrochemical Energy Conversion
JST Basic Research Programs (Core Research for Evolutional Science and Technology :CREST)
Project Year：
Material and Electrochemical Reaction for Mesothermal Fuel Cells
New Sunshine Program New Sunshine Project
Project Year：
Processes for Production and Utilization of Organic Hydride and Ammonia
Shigenori Mitsushima, Kensaku Nagasawa（ Role： Sole author）
（ ISBN:978-4-7813-1600-0 ）
Total pages：344 Responsible for pages：27-35 Language：Japanese Book type：Scholarly book
Metal Oxide-Based Nanostructured Electrocatalysts for Fuel Cells, Electrolyzers, and Metal-air Batteries
Yoshiyuki Kuroda, Shigenori Mitsushima（ Role： Joint author , 4 - Oxygen evolution reaction (OER) at nanostructured metal oxide electrocatalysts in water electrolyzers）
Elsevier （ ISBN:978-0-12-818496-7 ）
Total pages：268 Responsible for pages：61-82 Language：English Book type：Scholarly book
水素エネルギーの事典
光島重徳 外（ Role： Contributor）
水素エネルギー協会 編 （ ISBN:978-4-254-14106-1 ）
Total pages：240 Language：Japanese Book type：Scholarly book
Fuel Cells and Hydrogen
Viktor Hacker, Shigenori Mitsushima（ Role： Joint author）
From Fundamentals to Applied Research
Total pages：296 Language：English Book type：Scholarly book
リスク共生学
（ Role： Contributor）
丸善出版
Language：Japanese Book type：Scholarly book
Fundamental study for the improvement of molten carbonate fuel cells
Shigenori Mitsushima
1998.12
Doctoral Thesis Single Work
溶融炭酸塩中における材料の劣化に関する研究
光島重徳
1989.3
Master Thesis Single Work
横浜国立大学工学研究科
溶融炭酸塩形燃料電池用のカソード材料の安定性向上を目的とし、代表的なカソード材料である酸化ニッケルの溶解度の溶融炭酸塩の組成や温度に対する依存性ならびに代替材料であるニッケルフェライトの溶解度を測定し、その溶解メカニズムを明らかにした。
Operando observation of bubble formation and mass transfer overpotential in alkaline water electrolysis
MISUMI Ryuta, KURODA Yoshiyuki, ARAKI Takuto, MITSUSHIMA
JAPANESE JOURNAL OF MULTIPHASE FLOW 39 ( 1 ) 18 - 25 2025.3 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：THE JAPANESE SOCIETY FOR MULTIPHASE FLOW Joint Work
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 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Joint Work
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
Toyama, K; Kanemoto, R; Misumi, R; Araki, T; Mitsushima, S
ELECTROCHEMISTRY 93 ( 2 ) 027011 - 027011 2025 [Reviewed]
DOI Web of Science CiNii Research
Language：English Publishing type：Research paper (scientific journal) Publisher：公益社団法人 電気化学会 Joint Work
<p>In this study, a method for detecting and tracking hydrogen and oxygen bubbles during alkaline water electrolysis was developed using Faster R-CNN and DeepSORT. The images required for CNN training were automatically generated by a pseudo-bubble image generation algorithm specifically developed for the purpose of this study. The method was applied to the results of observations on alkaline water electrolysis obtained under various current densities and wire electrode diameters. Evaluation of detection performance using a confusion matrix showed that for the hydrogen evolution reaction (HER) at a current density of 1.0 A cm<sup>−2</sup> and a wire electrode diameter of 200 µm, the method achieved a precision of 1.00, recall of 0.840, and <i>F</i><sub>1</sub> score of 0.940, indicating very high detection performance. For the oxygen evolution reaction (OER), bubbles were detected almost perfectly under all conditions, with all detection metrics exceeding 1.00. The proposed method was approximately 20000 times faster than humans. Bubble diameter distribution, total volume, total number, and Sauter mean diameter were obtained and quantitatively assessed, and the relationships between current density and electrode diameter for both HER and OER have been discussed. This method enables accurate, rapid, and automatic quantitative evaluation of visualization results from various alkaline water electrolysis observations, which were previously difficult and labor-intensive to perform manually.</p>
Measurement Methods on Electrodes and Electrocatalysts for Water Electrolysis
MITSUSHIMA Shigenori, IOROI Tsutomu, KURODA Yoshiyuki, NAGASAWA Kensaku, UCHIYAMA Tomoki, ORIKASA Y … Show more authors
MITSUSHIMA Shigenori, IOROI Tsutomu, KURODA Yoshiyuki, NAGASAWA Kensaku, UCHIYAMA Tomoki, ORIKASA Yuki, INOUE Hiroshi, HIGUCHI Eiji, ANDO Kota, NAKAJIMA Takashi, MISUMI Ryuta, UCHIMOTO Yoshiharu Hide authors
Electrochemistry advpub ( 0 ) 2025 [Reviewed]
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：公益社団法人 電気化学会 Joint Work
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) Publisher：THE JAPANESE SOCIETY FOR MULTIPHASE FLOW Joint Work
Measurement Methods on Electrodes and Electrocatalysts for Water Electrolysis
Mitsushima, S; Ioroi, T; Kuroda, Y; Nagasawa, K; Uchiyama, T; Orikasa, Y; Inoue, H; Higuchi, E; And … Show more authors
Mitsushima, S; Ioroi, T; Kuroda, Y; Nagasawa, K; Uchiyama, T; Orikasa, Y; Inoue, H; Higuchi, E; Ando, K; Nakajima, T; Misumi, R; Uchimoto, Y Hide authors
ELECTROCHEMISTRY 93 ( 4 ) 046001 - 046001 2025
DOI Web of Science CiNii Research
Language：English Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Publisher：公益社団法人 電気化学会 Joint Work
<p>Toward decarbonized society with sustainable growth, the use of renewable energy as a primary power source is highly demanded. Water electrolysis is promising to produce hydrogen from renewable energy for energy storage and transportation. In developments of new technologies related to alkaline water electrolysis (AWE) and proton exchange membrane water electrolysis (PEMWE), common measurement techniques are required to compare experimental results fairly among different institutes. In this paper, we introduce common measurement techniques, such as electrochemical half cell and full cell for AWE and PEMWE, evaluation techniques for catalytic activities and durability of catalysts under steady and non-steady operation, advanced synchrotron radiation analysis of catalysts, <i>operando</i> XAFS analysis, and optical observation of gas bubbles in detail, that are recently developed in the project research commissioned by the New Energy and Industrial Technology Development Organization (NEDO).</p>
Electrolyzer Technologies in Toluene Direct Electro-hydrogenation for Methylcyclohexane Synthesis
NAGASAWA Kensaku, MITSUSHIMA Shigenori
Journal of the Japan Petroleum Institute 67 ( 3 ) 97 - 104 2024.5
DOI Web of Science CiNii Research
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Publisher：The Japan Petroleum Institute Joint Work
<p>This review presents an overview of the development of an electrolyzer for the direct electrohydrogenation of toluene, a one-step electrochemical process for directly synthesizing methylcyclohexane from toluene and water utilizing solid polymer electrolyte (SPE) membranes. Reducing the cell voltage and enhancing the current efficiency are important to improve the performance of a toluene direct electrohydrogenation electrolyzer. To improve these characteristics, the electrolyzer components consisting of the flow field, the diffusion layer, the anode mesh size, and the collector and cathode catalyst layer were modified and optimized. Investigation of the flow field structure found that the porous carbon flow field exhibited the highest performance, with remarkable improvement in current efficiency. Decrease in current efficiency indicates hydrogen gas generation at the cathode. However, loading of the Pt catalyst in the porous carbon flow field on the cathode side resulted in chemical reaction of the hydrogen gas generated in the catalyst layer with toluene utilizing the Pt catalyst, which significantly improved the overall current efficiency. Smaller mesh size of the anode and heat-pressing treatment of the anode current collector reduced the cell voltage with increased cathode catalyst utilization ratio by improvement of surface pressure uniformity and membrane flatness. The toluene permeation properties of various SPE membranes were determined and the relationship between the catalyst layer thickness and electrolysis performance was clarified. The developed technologies improved the cell voltage at 0.4 A cm<sup>−2</sup> current density from 2.10 to 1.72 V and achieved more than 90 % toluene conversion in continuous single-flow operation.</p><p>This review presents an overview of the development of an electrolyzer for the direct electrohydrogenation of toluene, a one-step electrochemical process for directly synthesizing methylcyclohexane from toluene and water utilizing solid polymer electrolyte (SPE) membranes. Reducing the cell voltage and enhancing the current efficiency are important to improve the performance of a toluene direct electrohydrogenation electrolyzer. To improve these characteristics, the electrolyzer components consisting of the flow field, the diffusion layer, the anode mesh size, and the collector and cathode catalyst layer were modified and optimized. Investigation of the flow field structure found that the porous carbon flow field exhibited the highest performance, with remarkable improvement in current efficiency. Decrease in current efficiency indicates hydrogen gas generation at the cathode. However, loading of the Pt catalyst in the porous carbon flow field on the cathode side resulted in chemical reaction of the hydrogen gas generated in the catalyst layer with toluene utilizing the Pt catalyst, which significantly improved the overall current efficiency. Smaller mesh size of the anode and heat-pressing treatment of the anode current collector reduced the cell voltage with increased cathode catalyst utilization ratio by improvement of surface pressure uniformity and membrane flatness. The toluene permeation properties of various SPE membranes were determined and the relationship between the catalyst layer thickness and electrolysis performance was clarified. The developed technologies improved the cell voltage at 0.4 A cm<sup>−2</sup> current density from 2.10 to 1.72 V and achieved more than 90 % toluene conversion in continuous single-flow operation.</p>
Water Electrolysis as Hydrogen Production Technology from Renewable Electricity
MITSUSHIMA Shigenori
Nihon Enerugii Gakkai Kikanshi Enermix 101 ( 6 ) 713 - 719 2022.11
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Publisher：The Japan Institute of Energy Single Work
Electrochemical Methods for Water Electrolysis Electrodes and Electrocatalysts
MITSUSHIMA Shigenori, IOROI Tsutomu, KURODA Yoshiyuki, NAGASAWA Kensaku, UCHIYAMA Tomoki, ORIKASA Y … Show more authors
MITSUSHIMA Shigenori, IOROI Tsutomu, KURODA Yoshiyuki, NAGASAWA Kensaku, UCHIYAMA Tomoki, ORIKASA Yuki, INOUE Hiroshi, HIGUCHI Eiji, ANDO Kota, NAKAJIMA Takashi, MISUMI Ryuta, UCHIMOTO Yoshiharu Hide authors
Denki Kagaku 90 ( 2 ) 136 - 158 2022.6
Authorship：Lead author, Corresponding author Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Publisher：The Electrochemical Society of Japan Joint Work
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電解用陽極及びその製造方法
光島 重徳、黒田 義之、長澤 兼作、円城寺 勇斗、錦 善則、加藤 昭博、ザエナル アワルディン、中井 貴章
Applicant：デノラ・ペルメレック株式会社／国立大学法人横浜国立大学
Application no：PCT/JP2023/037828 Date applied：2023.10.19
Announcement no：WO2024/101105 Date announced：2024.5.16
Country of applicant：Domestic , Foreign country , International (PCT) application
３次元規則骨格構造を有する金属部材、水電解装置、燃料電池
光島 重徳、黒田 義之、長澤 兼作、佐野 陽祐、大森 信一、加藤 純
Applicant：横浜国立大学、三菱マテリアル
Application no：PCT/JP2023?032127 Date applied：2023.9.1
Announcement no：WO2024/048791 Date announced：2024.3.7
Country of applicant：International (PCT) application
アルカリ水電解用隔膜、アルカリ水電解セル、及び、アルカリ水電解方法
光島 重徳、黒田 義之、長澤 兼作、アシュラフ アブドルハリム、芥川 寛信、三佐和 裕二、中山 信也
Applicant：株式会社日本触媒／国立大学法人横浜国立大学
Application no：PCT/JP2023/029162 Date applied：2023.8.9
Announcement no：WO2024/048235 Date announced：2024.3.7
Country of applicant：Domestic , International (PCT) application
アルカリ水電解装置
光島 重徳、奥野 一樹、東野 孝浩、俵山 博匡、黒田 義之、細江 晃久
Applicant：横浜国立大学、住友電気工業
Application no：PCT/JP2023/015597 Date applied：2023.4.19
Announcement no：WO2024/047934 Date announced：2024.3.3
Country of applicant：Domestic , International (PCT) application
水溶液電解方法
三角 隆太、光島 重徳、池田 隼太、錦 善則、加藤 昭博、中井 貴章
Applicant：デノラ・ペルメレック株式会社／国立大学法人横浜国立大学
Application no：2023-569072 Date applied：2022.9.29
Announcement no：WO2023/119779 Date announced：2023.6.29
Country of applicant：Domestic , International (PCT) application
2024.7 公益社団法人発明協会 耐久性の高い水素キャリアとしての有機ハイドライド製造装置及び製造方法の発明 （特許第６７５８６２８号）
Individual or group name of awards： 光島重徳(横浜国立大学)、 長澤兼作(産業技術総合研究所)、 錦善則(デノラ・ペルメレック(株))、加藤昭博(デノラ・ペルメレック(株))、尾形節郎(デノラ・ペルメレック(株))、Zaenal Awaludin(デノラ・ペルメレック(株))、眞鍋明義(デノラ・ペルメレック(株))、佐藤 康司(ＥＮＥＯＳ(株))、松岡孝司(ＥＮＥＯＳ(株))
Electrochemistry誌の2023年の被引用上位論文「第2位」
2024.7 Electrochemistry
Individual or group name of awards：Ashraf ABDEL HALEEM, 長澤 兼作, 黒田 義之, 錦 善則, Awaludin ZAENAL, 光島 重徳
平成31年度電気化学会論文賞
2019.3 電気化学会 Dependence of the Reverse Current on the Surface of Electrode Placed on a Bipolar Plate in an Alkaline Water Electrolyzer
Individual or group name of awards：内野 陽介、小林 貴之、長谷 川 伸司、永島 郁男、砂田 良 雄、真鍋 明義、錦 善則、光島 重徳
平成26年度業績賞
2014.11 電気化学会電解科学技術委員会
Individual or group name of awards：光島重徳
常温水電解の実用化基盤研究プラットフォームの構築
2023.6 - 2025.3
NEDO燃料電池等利用の飛躍的拡大に向けた共通課題解決型産学官連携研究開発事業
Authorship：Principal investigator
トルエン直接電解水素化電解槽の水挙動の解析と電流効率の向上
2021.6 - 2023.3
水素利用等先導研究開発事業／エネルギーキャリアシステム調査・研究
アルカリ水電解及び固体高分子形水電解の高度化
2018.7 - 2023.3
水素利用等先導研究開発事業／水電解水素製造技術高度化のための基盤技術研究開発
有機ハイドライド電解合成用電極触媒の研究開発
2017.5 - 2018.2
エネルギー・環境新技術先導プログラム
Investigator(s)：光島重徳
＜エネルギーキャリア・チーム＞有機ハイドライド
2013.7 - 2014.6
Japan Science and Technology Agency 戦略的創造研究推進事業 先端的低炭素化技術開発（ＡＬＣＡ） 特別重点技術領域
Investigator(s)：光島重徳
熱分解条件最適化によるアルカリ水電解用NiCo酸化物被覆Ni電極の起動停止耐久性向上
Gu Kyounghee、三輪 琢斗、Ashraf Abdel Haleem、黒田 義之、光島 重徳
電気化学会第92回大会 2025.3 電気化学会
Event date： 2025.3
Language：Japanese Presentation type：Oral presentation (general)
Venue：東京農工大学
Exploring the Effects of Voltage Ripples on Alkaline Water Electrolysis Performance
Ashraf Abdelhaleem1,Yoshiyuki Kuroda,Noriko Kawakami,Manabu Souda,Shigenori Mitsushima
2025.3
Event date： 2025.3
Language：English Presentation type：Oral presentation (general)
Comparison of Cyclic and Continuous Protocols in the Deposition of Composite Self-Repairing Catalysts.
2025.3
Event date： 2025.3
Language：English Presentation type：Oral presentation (general)
ステンレス基材におけるアルカリ水電解用自己修復触媒の堆積速度の解析
李 相旭、和合 拓紀、光島 重徳、黒田 義之
電気化学会第92回大会 2025.3 電気化学会
Event date： 2025.3
Language：Japanese Presentation type：Oral presentation (general)
Venue：東京農工大学
A techno-economic analysis of carbon neutral energy system for Japan with hydrogen technologies
Shigenori MITSUSHIMA [Invited]
The 5th International Conference of the Advanced Materials Technology and Mineral Resources Research Institute in Collaboration with JSPS 2025.2 NRC, Egypt
Event date： 2025.2
Language：English Presentation type：Oral presentation (invited, special)
Venue：NRC, Cairo, Egypt
2025 Chemistry, Chemical Engineering and Life Science: Exercise B
College of Engineering Science
2025 Value Chain System
College of Engineering Science
2025 Energy Creation Engineering
College of Engineering Science
2025 Energy System Engineering
College of Engineering Science
2025 Introduction to Energy Engineering
Liberal Arts Education
水素エネルギー協会
2022.5 - 2024.5 会長
Committee type：Academic society
電気化学会
2019.4 - 2021.3 理事・会計理事
Committee type：Academic society
H31-32年度電気化学会理事・会計理事
水素エネルギー協会
2018.4 - 2022.3 業務執行副会長
Committee type：Academic society
Electrocatalysis
2018.1 Topical Editor
Committee type：Academic society
埼玉県 水素エネルギー普及推進協議会
2017.12 会長
Committee type：Other
光島重徳「市内CO2排出削減が日本全体に役に立つ」 川崎区で「水素戦略」シンポジウム
Role(s)： Guest, Lecturer, Logistic support
川崎臨海部水素ネットワーク協議会 「水素戦略」シンポジウムを開催後（川崎区 2020年2月19日）東京新聞に掲載（2020年2月20日） 2020.2
Audience： University students, Graduate students, Teachers, Researchers, Company, Government agency, Media, Other
Type：Lecture
エネルギー・環境問題と水素・燃料電池技術の現状
工学研究院 横浜国立大学 2007.6
Type：Extension Lecture
エネルギー・環境問題を克服し、持続成長可能な社会を築くためには地球規模の視点での問題提起とナノレベルの技術開発が欠かせません。本講座では、来るべき水素社会の本質と新エネルギーの開発、燃料電池の現状技術
