Researcher basic information

• 博士（工学）（北海道大学）

• https://researchmap.jp/Yuta_Fujii?lang=en

• https://jglobal.jst.go.jp/detail?JGLOBAL_ID=202301015645123587
• https://orcid.org/0000-0002-8381-4119
• https://www.eng.hokudai.ac.jp/labo/inorgsyn/

• https://orcid.org/0000-0002-8381-4119

• HZH-5991-2023

• 202301015645123587

• 固体電池

• Nanotechnology/Materials, Inorganic compounds and inorganic materials chemistry

• Bachelor's degree program, School of Engineering
• Master's degree program, Graduate School of Chemical Sciences and Engineering
• Doctoral (PhD) degree program, Graduate School of Chemical Sciences and Engineering

Research activity information

• Accelerating electrochemical CO₂-to-CO conversion with Zn–Al layered double hydroxide amorphized by grinding treatment
  Ryosuke Nakazato; Keeko Matsumoto; Matthias Quintelier; Joke Hadermann; Margherita Cavallo; Valentina Crocellà; Francesca Bonino; Nataly Carolina Rosero-Navarro; Yuta Fujii; Akira Miura; Kiyoharu Tadanaga
  Journal of the Ceramic Society of Japan, 134, 4, 316, 324, Ceramic Society of Japan, 01 Apr. 2026
  Scientific journal
• Preparation and characterization of low-melting LiF–SnO–P₂O₅ glasses
  Hime Shibata; Kentaro Tabuchi; Riki Tokoro; Yuta Fujii; Akira Miura; Yuji Masubuchi; Kiyoharu Tadanaga
  Journal of the Ceramic Society of Japan, Ceramic Society of Japan, 2026, [Peer-reviewed], [Corresponding author]
  Scientific journal
• Disorder in the Antifluorite Sulfide Cathode: Li_1.7Cu_0.15S₂
  Akira Miura; Yi-Ting Cheng; Takenaka Masahiro; Yusuke Nambu; Shunsuke Sasaki; Masanori Nagao; Takato Mitsudome; Yuta Fujii; Kiyoharu Tadanaga; Nobuya Machida; Christopher J. Bartel
  Chemistry of Materials, 37, 21, 8521, 8528, American Chemical Society (ACS), 31 Oct. 2025, [Peer-reviewed]
  Scientific journal
• Kinetic effects of ball-milling precursors on the synthesis pathway of KSbF4
  Ryuku Hisasue; Tack Saquai; Tom Ichibha; Yuta Fujii; Aichi Yamashita; Kenta Hongo; Ryo Maezono; Kiyoharu Tadanaga; Akira Miura
  Ceramics International, 51, 21, 33653, 33660, Elsevier BV, Sep. 2025, [Peer-reviewed]
  Scientific journal
• Electrochemical CO₂ reduction reaction catalytic activity of zirconium nitrides synthesized by the urea-glass route using ZrCl₄ as a raw material
  Kentaro Tabuchi; Shinji Noguchi; Ryosuke Nakazato; Keeko Matsumoto; Yuta Fujii; Akira Miura; Kiyoharu Tadanaga
  Journal of the Ceramic Society of Japan, 133, 2, 47, 51, Ceramic Society of Japan, 01 Feb. 2025, [Peer-reviewed]
  Scientific journal
• The Detail Matters: Unveiling Overlooked Parameters in the Mechanochemical Synthesis of Solid Electrolytes
  Abdulkadir Kızılaslan; Mustafa Çelik; Yuta Fujii; Zheng Huang; Chikako Moriyoshi; Shogo Kawaguchi; Satoshi Hiroi; Koji Ohara; Mariko Ando; Kiyoharu Tadanaga; Saneyuki Ohno; Akira Miura
  ACS Energy Letters, 10, 1, 156, 160, American Chemical Society (ACS), 16 Dec. 2024, [Peer-reviewed], [Corresponding author]
  Scientific journal
• Rapid In Situ Investigation of Nitride Synthesis: Ambient Atmospheric Nitridation of 3d Metal Oxides Using Dicyandiamide
  Momoka Demura; Keigo Ono; Masanori Nagao; Takafumi Yamamoto; Chul-Ho Lee; Aichi Yamashita; Chikako Moriyoshi; Shohei Tada; Yuji Masubuchi; Yuta Fujii; Kiyoharu Tadanaga; Akira Miura
  Chemistry of Materials, 36, 23, 11490, 11498, American Chemical Society (ACS), 21 Nov. 2024, [Peer-reviewed]
  Scientific journal
• Inorganic-Organic Hybrid Sulfide Solid Electrolytes Based on the Tetraalkylammonium Iodide-LiI-Li₂S-P₂S₅ System
  Tong Fang; Kazuhiro Hikima; Hiroyuki Muto; Atsunori Matsuda; Yuta Fujii; Akira Miura; Kiyoharu Tadanaga
  Journal of the Electrochemical Society, 171, 10, 01 Oct. 2024, [Peer-reviewed]
  Scientific journal
• Synthesis, Electronic Structure, and Redox Chemistry of Li₂MnP₂S₆, a Candidate High-Voltage Cathode Material
  Yi-Ting Cheng; Yuta Fujii; Yu Nomata; Madhulika Mazumder; Nataly Carolina Rosero-Navarro; Aichi Yamashita; Yoshikazu Mizuguchi; Chikako Moriyoshi; Takato Mitsudome; Toshiaki Ina; Kiyofumi Nitta; Kiyoharu Tadanaga; Akira Miura; Christopher J. Bartel
  Chemistry of Materials, 18 Sep. 2024, [Peer-reviewed], [Lead author]
  Scientific journal
• Structural Color Materials with Color Mixing Effect Using Noble Metal‐Free Plasmonic Particles in SiO₂–ZrN System
  Shinji Noguchi; Milena Lama; Yuta Fujii; Akira Miura; Kiyoharu Tadanaga
  Advanced Optical Materials, 2400287, 15 Apr. 2024, [Peer-reviewed]
  Scientific journal
• Preparation of carbon–sulphur composite electrodes by solution impregnation and application to all-solid-state lithium–sulphur batteries
  Sakura Niwa; Yuta Fujii; Nataly Carolina Rosero-Navarro; Akira Miura; Kiyoharu Tadanaga; Riku Maniwa; Misaki Fujimoto; Harumi Takada; Masahiro Morooka
  Energy Advances, 3, 3, 609, 613, Royal Society of Chemistry (RSC), Jan. 2024, [Peer-reviewed], [Corresponding author]
  Scientific journal, Composite electrodes were prepared by impregnating both sulphur and solid electrolyte solutions into the interior of the porous carbon and drying them, and the composites were applied to all solid-state lithium-sulphur batteries.
• Synthesis of lithium oxy-thiophosphate solid electrolytes with Li₁₀GeP₂S₁₂ structure by a liquid phase process using 2-propanol
  Shunichiro Shiba; Akira Miura; Yuta Fujii; Kiyoharu Tadanaga; Kota Terai; Futoshi Utsuno; Hiroyuki Higuchi
  RSC Advances, 13, 33, 22895, 22900, Royal Society of Chemistry (RSC), Jul. 2023, [Peer-reviewed]
  Scientific journal, Crystal structure model of lithium oxy-thiophosphates (LPSO) prepared in the present study (a) and Li₁₀GeP₂S₁₂ (b). Purple spheres indicate P, yellow spheres indicate S, red spheres indicate O, and green spheres indicate Ge.
• Numerical simulations of all-solid-state batteries using specific contact area diameters for active materials determined by X-ray computed tomography
  S. Iwamoto; M. Kodama; K. Yanagi; Y. Haniu; Y. Fujii; N. Masuda; H. Higuchi; Y. Suetsugu; S. Hirai
  Journal of Power Sources Advances, 21, 100120, 100120, Elsevier BV, Apr. 2023, [Peer-reviewed]
  Scientific journal
• Preparation of Composite Electrodes for All-Solid-State Batteries Based on Sulfide Electrolytes: An Electrochemical Point of View
  Sara Giraldo; Koki Nakagawa; F.A. Vásquez; Yuta Fujii; Yongming Wang; Akira Miura; Jorge Calderon; Nataly Carolina Rosero Navarro; Kiyoharu Tadanaga
  Batteries, 7, 4, 77, 77, {MDPI} {AG}, 11 Nov. 2021, [Peer-reviewed]
  English, Scientific journal, All-solid-state batteries (ASSBs) are a promising response to the need for safety and high energy density of large-scale energy storage systems in challenging applications such as electric vehicles and grid integration. ASSBs based on sulfide solid electrolytes (SEs) have attracted much attention because of their high ionic conductivity and wide electrochemical windows of the sulfide SEs. Here, we study the electrochemical performance of ASSBs using composite electrodes prepared via two processes (simple mixture and solution processes) and varying the ionic conductor additive (80Li2S∙20P2S5 and argyrodite-type Li6PS5Cl). The composite electrodes consist of lithium-silicate-coated LiNi1/3Mn1/3Co1/3O2 (NMC), a sulfide SE, and carbon additives. The charge-transfer resistance at the interface of the solid electrolyte and NMC is the main parameter related to the ASSB’s status. This value decreases when the composite electrodes are prepared via a solution process. The lithium silicate coating and the use of a high-Li-ion additive conductor are also important to reduce the interfacial resistance and achieve high initial capacities (140 mAh g−1).
• Fast discharge–charge properties of FePS₃ electrode for all-solid-state batteries using sulfide electrolytes and its stable diffusion path
  Yuta Fujii; Hiroaki Ito; Akira Miura; Nataly Carolina Rosero-Navarro; Kiyoharu Tadanaga; Li Lu
  Functional Materials Letters, 14, 03, 2141005, 2141005, World Scientific Pub Co Pte Lt, Apr. 2021, [Peer-reviewed], [Lead author]
  English, Scientific journal, We report the fast discharge–charge cycle of micro-sized FePS3 electrode particles in all-solid-state batteries (ASSBs) using sulfide electrolytes at 80∘C. At a current density of 2.04 mA cm[Formula: see text], corresponding to approximately 1 C, the capacity of the FePS3 electrodes reached [Formula: see text]180 mAh g[Formula: see text] without any electron or lithium-ion conductive additives. Galvanostatic intermittent titration technique (GITT) measurements showed a stable diffusion path of FePS3 represented by the product of the diffusion coefficient and square of the surface area. These electrochemical properties were compared with those of FeS, whose capacity was lower because of its unstable diffusion path.
• Fe–P–S electrodes for all-solid-state lithium secondary batteries using sulfide-based solid electrolytes
  Yuta Fujii; Misaki Kobayashi; Akira Miura; Nataly Carolina Rosero-Navarro; Minchan Li; Jianguo Sun; Masashi Kotobuki; Li Lu; Kiyoharu Tadanaga
  Journal of Power Sources, 449, 227576, 227576, Elsevier {BV}, Feb. 2020, [Peer-reviewed], [Lead author]
  Scientific journal
• Two-Dimensional Hybrid Halide Perovskite as Electrode Materials for All-Solid-State Lithium Secondary Batteries Based on Sulfide Solid Electrolytes
  Yuta Fujii; Daniel Ramirez; Nataly Carolina Rosero-Navarro; Domingo Jullian; Akira Miura; Franklin Jaramillo; Kiyoharu Tadanaga
  ACS Applied Energy Materials, 2, 9, 6569, 6576, American Chemical Society ({ACS}), 23 Sep. 2019, [Peer-reviewed], [Lead author]
  Scientific journal
• Synthesis of submicron-sized NiPS₃ particles and electrochemical properties as active materials in all-solid-state lithium batteries
  Yusaku SUTO; Yuta FUJII; Akira MIURA; Nataly Carolina ROSERO-NAVARRO; Mikio HIGUCHI; Kiyoharu TADANAGA
  Journal of the Ceramic Society of Japan, 126, 7, 568, 572, Ceramic Society of Japan, 01 Jul. 2018, [Peer-reviewed]
  English, Scientific journal
• Reaction Mechanism of FePS₃ Electrodes in All-Solid-State Lithium Secondary Batteries Using Sulfide-Based Solid Electrolytes
  Yuta Fujii; Akira Miura; Nataly Carolina Rosero Navarro; Yoshikazu Mizuguchi; Chikako Moriyoshi; Yoshihiro Kuroiwa; Mikio Higuchi; Kiyoharu Tadanaga
  Journal of The Electrochemical Society, 165, 13, A2948, A2954, The Electrochemical Society, 2018, [Peer-reviewed], [Lead author]
  English, Scientific journal
• FePS₃ electrodes in all-solid-state lithium secondary batteries using sulfide-based solid electrolytes
  Yuta Fujii; Akira Miura; Nataly Carolina Rosero-Navarro; Mikio Higuchi; Kiyoharu Tadanaga
  Electrochimica Acta, 241, 370, 374, Elsevier {BV}, Jul. 2017, [Peer-reviewed], [Lead author]
  English, Scientific journal
• Development of All-solid-state Lithium Secondary Batteries Using NiPS₃ Electrode and Li₂S-P₂S₅ Solid Electrolyte
  Yuta Fujii; Yusaku Suto; Akira Miura; Mikio Higuchi; Kiyoharu Tadanaga
  Chemistry Letters, 45, 6, 652, 654, The Chemical Society of Japan, 05 Jun. 2016, [Peer-reviewed], [Lead author]
  English, Scientific journal

• TTT diagram of Li₃PS₄ via synchrotron X-ray diffraction
  三浦章; 藤井雄太; 忠永清治; 山下愛智; 水口佳一; 河口彰吾, 日本セラミックス協会年会講演予稿集(Web), 2025, 2025

• 化学と工業 Vol.79, No.3 メカノケミカル法による固体電解質の開発
  pp.192-193
  公益社団法人 日本化学会, Mar. 2026
• 月刊ファインケミカル 2024年9月号 【特集】全固体電池の普及に向けた固体電解質の最新研究
  pp.5-9
  シーエムシー出版, 15 Sep. 2024, [Joint work]

• SiO2-ZrN系コア-シェル粒子を用いた構造色材料の開発と混色効果
  野口 真司; Milena Lama; 藤井 雄太; 三浦 章; 忠永 清治
  第22回日本ゾル-ゲル学会討論会, 25 Jul. 2024
• Ni-Al系層状複水酸化物の水酸化物イオン伝導性評価と応用
  橋本涼香; 藤井雄太; 三浦 章; 忠永清治
  日本化学会北海道支部夏季研究発表会, 20 Jul. 2024
• MoCl3の水素発生触媒能評価
  宮田渓吾; 藤井雄太; 忠永清治; 三浦 章
  日本化学会北海道支部夏季研究発表会, 20 Jul. 2024
• CrNおよびNbNの低温合成
  神谷啓吾; 藤井雄太; 三浦 章; 忠永清治
  日本化学会北海道支部夏季研究発表会, 20 Jul. 2024
• V-P-S系層状化合物を正極材料に用いた全固体リチウム二次電池の開発
  小市凱介; 藤井雄太; 三浦 章; 忠永清治
  日本化学会北海道支部夏季研究発表会, 20 Jul. 2024
  47929114
• 全固体リチウムー硫黄電池用硫化リチウム正極材料の開発
  水谷英紀; 藤井雄太; 三浦 章; 忠永清治; 石原悠; 樋口弘幸; 関口真弘
  日本化学会北海道支部夏季研究発表会, 20 Jul. 2024
• 液相法によるLi-P-S-O系固体電解質の合成と評価
  太田陽也; 柴駿一郎; 藤井雄太; 三浦 章; 忠永清治; 寺井恒太; 宇都野太; 樋口弘幸
  日本化学会北海道支部夏季研究発表会, 20 Jul. 2024
• Synthesis of Li2MP2S6 (M=Mn, Fe, Co, Ni) Using Metal Iodide and its Application as a Cathode Material for All-solid-state Lithium Batteries
  Y. Fujii; C. Yi-Ting; Y. Nomata; M. Madhulika; N.C. Rosero-Navarro; A. Yamashita; K. Mizuguchi; C. Moriyoshi; K. Tadanaga; A. Miura; J. Bartel Christopher
  The 22nd International Meeting on Lithium Batteires, 20 Jun. 2024
  16 Jun. 2024 - 21 Jun. 2024
• ZrCl4を原料に用いたUrea-glass法により合成したジルコニウム窒化物の電気化学的CO2還元触媒活性
  田渕 健太朗; 中里 亮介; 松本 慶江子; 藤井 雄太; 三浦 章; 忠永 清治
  電気化学会第91回大会, 14 Mar. 2024
  14 Mar. 2024 - 16 Mar. 2024
• 金属ヨウ化物を用いたLi2MP2S6(M=Mn, Fe, Co, Ni)の合成およびその全固体電池用正極材料としての評価
  藤井 雄太; Cheng Yi-Ting; 野又 優; Mazumder Madhulika; Rosero-Navarro Nataly Carolina; 山下 愛智; 水口 佳一; 森吉 千佳子; 満留 敬人; 忠永 清治; 三浦 章; J. Bartel Christopher
  電気化学会第91回大会, 14 Mar. 2024
  14 Mar. 2024 - 16 Mar. 2024

• 大学院共通授業科目（一般科目）：自然科学・応用科学, 2024年, 修士課程, 大学院共通科目
• 応用化学特別講義, 2024年, 修士課程, 総合化学院
• 先端総合化学特論Ⅱ, 2024年, 博士後期課程, 総合化学院
• 工学特別講義, 2024年, 学士課程, 工学部
• 化学英語, 2024年, 学士課程, 工学部
• 応用化学学生実験Ⅱ, 2024年, 学士課程, 工学部

• Develpment of electrochemical CO2 recution catalyst based on Layere double hydroxides
  Grants-in-Aid for Scientific Research
  Apr. 2024 - Mar. 2028
  忠永 清治; 藤井 雄太
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 24K01152
• 不可逆な反応過程を利用した全固体リチウム二次電池の高性能化手法の探索
  科学研究費助成事業
  Apr. 2024 - Mar. 2026
  藤井 雄太
  日本学術振興会, 若手研究, 北海道大学, 24K17751
• 全固体リチウム二次電池用硫黄-活性炭複合正極の高性能化
  Jul. 2024 - Jun. 2025
  2024年度北海道ガス大学研究支援制度
• Chemistry of Lithium-ion conducting sulfide-based solid electrolyte by solution process
  Grants-in-Aid for Scientific Research
  Apr. 2021 - Mar. 2024
  Tadanaga Kiyoharu
  The main objectives of the present study are to elucidate the reactions of precursors and solvents in solution during the liquid-phase synthesis of sulfide-based solid electrolytes, to design reaction pathways for various sulfide solid electrolytes, and to explore novel solid electrolytes.
  
  
  The structure of the precursor complexes formed during the liquid-phase synthesis was analyzed, and the relationship between their thermal decomposition behavior and the resulting phase was clarified. By using both a suspension process and a dissolution-reprecipitation process, we demonstrated that the particle size of the resulting sulfide solid electrolytes can be controlled. We also showed that by using alcohol as a reaction solvent, oxythiophosphate-based solid electrolytes with oxygen incorporated into their structure were obtained.
  Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 21H01610
• 硫化物系固体電解質を用いた全固体電池用高容量・高電位電極活物質の開発
  科学研究費助成事業
  25 Apr. 2018 - 31 Mar. 2020
  藤井 雄太
  本年度は、二種類の電極材料について評価した。
  一つ目は、前年度合成し、その反応機構の解明に取り組んできた、FeS2と低結晶性のP-Sの微粒子から構成される電極材料である。本年度は、その電子伝導性やLi+拡散係数を調べ、前年度得られた充放電特性との関係性について調べた。合成したFeS2とP-Sの微粒子から成る複合電極材料では、室温においては電子伝導性が充放電反応の律速となり、一方、80℃や100℃のような高温ではLi+の拡散が充放電反応の律速となっていることがわかった。
  二つ目は、これまで太陽電池の光吸収材料として研究されてきたペロブスカイト型有機-無機ハイブリッドハロゲン化鉛(HHP)である。特に、Li+が層間を挿入・脱離するインサーション反応を示す可能性のある二次元構造を有する系（2D-HHP）について、全固体電池用電極材料として評価した。2D-HHPを用いた全固体電池は、室温において充放電挙動を示し、HHPが全固体電池の電極材料として機能することがわかった。さらに、充放電特性を向上させるため100℃において充放電試験を行った結果、およそ250 mAh g-1の可逆容量を示すことが確認された。さらに、充放電時における2D-HHPの生成物を同定することで、その反応機構を調べた結果、インサーション反応、コンバージョン反応、合金化・脱合金化反応の三段階のプロセスで反応が進行することがわかった。以上の結果から、HHPが全固体電池用電極材料になり得ることを明らかにした。
  日本学術振興会, 特別研究員奨励費, 北海道大学, 18J11169

• 差分電気化学インピーダンス解析法
  Patent right, 小林 清; 増田 直也; 藤井 雄太; 柳 和明; 宇都野 太; 樋口 弘幸, 国立研究開発法人物質・材料研究機構，出光興産株式会社
  特願2021-111166, 03 Jul. 2021
  特開2023-7980, 19 Jan. 2023
• 正極合材、正極合材の製造方法及びリチウムイオン電池
  Patent right, 羽二生 大和; 濱野 藍; 樋口 弘幸; 石原 悠; 藤井 雄太
  特願2023-017086
• 正極合材、正極合材の製造方法及びリチウムイオン電池
  Patent right, 羽二生 大和; 樋口 弘幸; 石原 悠; 藤井 雄太
  特願2022-127908
• 正極合材、リチウムイオン電池、正極合材用組成物、及び正極合材の製造方法
  Patent right, 藤井 雄太, 羽二生 大和, 樋口 弘幸, 石原 悠
  特願2022-125206
• 正極合材及びリチウムイオン電池
  Patent right, 石原 悠; 樋口 弘幸; 藤井 雄太; 羽二生 大和; 山口 展史
  特願2022-129480
  特開2024-26930