Researcher basic information

• Doctor of Philosophy in Engineering, Osaka Prefecture University, Sep. 2022

• https://researchmap.jp/akira10nasu50?lang=en

• https://jglobal.jst.go.jp/detail?JGLOBAL_ID=202201000344293865
• https://orcid.org/0009-0002-7779-5721

• https://orcid.org/0009-0002-7779-5721

• 202201000344293865

• Solid electrolytes
• Active materials
• all-solid-state batteries
• Sulfide

• Nanotechnology/Materials, Inorganic compounds and inorganic materials chemistry

• Bachelor's degree program, School of Science
• 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

• Substitutional Design of Nanosized α-MnO2 Cathode for Rechargeable Magnesium Battery
  Takashi Yabu; Haruki Shinohara; Reona Iimura; Ruijie Zhu; Akira Nasu; Shin Kiyohara; Naoto Kitamura; Toshihiko Mandai; Yu Kumagai; Masaki Matsui; Hiroaki Kobayashi
  ACS Applied Energy Materials, 14 May 2026
  Scientific journal
• Ultra‐Low‐Strain Calcium and Magnesium Ion Storage Enabled by Tunnel‐Structured MoO3 Positive Electrode
  Reona Iimura; M. D. Hashan C. Peiris; Takashi Yabu; Toshihiko Mandai; Ruijie Zhu; Akira Nasu; Saneyuki Ohno; Masaki Matsui; Itaru Honma; Manuel Smeu; Hiroaki Kobayashi
  Advanced Energy Materials, 28 Apr. 2026
  Scientific journal
• Analyzing how the densification of LiTa2PO8 ceramic electrolyte affects the ionic transport and mechanical properties
  Kana Onoue; Jeff Wolfenstine; Akira Nasu; Masaki Matsui; Jeff Sakamoto
  Journal of Power Sources, Apr. 2026
  Scientific journal
• Essential Factors in Lithium Ternary Fluorides for High‐Voltage Cathode Coating Materials
  Kenta Nakanishi; Akira Nasu; Daisuke Abe; Koji Tanoue; Masaki Matsui; Hiroaki Kobayashi
  Battery Energy, Mar. 2026
  Scientific journal
• Pre‐Coverage of Side Reaction Sites Enables Quasi‐Anode‐Free Rechargeable Aqueous Zinc Batteries
  Ruijie Zhu; Takashi Yabu; Cheng Yang; Shunyu Yao; Huijun Yang; Akira Nasu; Masaki Matsui; Hiroaki Kobayashi
  Advanced Functional Materials, Mar. 2026
  Scientific journal
• Low temperature synthesis of nickel-based layered cathodes
  Ryo Nakanishi; Yasuhide Nakajima; Kerdsiri Somphong; Akira Nasu; Hiroaki Kobayashi; Masaki Matsui
  Chemistry Letters, 54, 11, Oxford University Press (OUP), 22 Oct. 2025
  Scientific journal, Abstract
  
  We investigated low temperature synthesis process of nickel-based layered cathodes. In the case of LiNiO2 synthesis, the oxidation process of Ni2+ to Ni3+ requires a high temperature of >500 °C. On the other hand, the Na2O2 formation enables the synthesis of NaNiO2 at 300 °C, suggesting that an additional oxidation process of nickel is required for the successful synthesis of the layered LiNiO2. The layered LiNiO2 is synthesized at 300 °C using NiOOH as the starting material. Both the charge-discharge profiles and X-ray absorption spectroscopy suggest partial reduction of the Ni3+ species under hydroflux conditions, resulting in the formation of a disordered rocksalt domain.
• Romanechite, an Asymmetric Tunnel‐Type MnO2, for Rechargeable Magnesium Battery Cathodes
  Takashi Yabu; Reona Iimura; Akira Nasu; Toshihiko Mandai; Masaki Matsui; Hiroaki Kobayashi
  Batteries & Supercaps, Oct. 2025
  Scientific journal
• Decoding Cathode‐Electrolyte Interface Issues in Conventional Ethers Electrolytes‐Based Magnesium Rechargeable Batteries
  Ruijie Zhu; Takashi Yabu; Cheng Yang; Huijun Yang; Akira Nasu; Toshihiko Mandai; Masaki Matsui; Hiroaki Kobayashi
  Advanced Energy Materials, Aug. 2025
  Scientific journal
• Ultrasmall Manganese Nanospinels Produced via an Alcohol Reduction Method and Their Electrocatalytic Oxygen Evolution Reactivity
  Yuuki Sugawara; Kazuyuki Iwase; Reona Iimura; Takashi Yabu; Akira Nasu; Masaki Matsui; Itaru Honma; Takeo Yamaguchi; Hiroaki Kobayashi
  ACS Applied Materials & Interfaces, 16 Apr. 2025
  Scientific journal
• Selective Growth of ZnO Nanosheets via Ionic Layer Epitaxy for UV Photodetection Application
  Ryunosuke Matsumura; Yuta Kazama; Hikaru Saito; Takao Yasui; Yasutaka Matsuo; Akira Nasu; Hiroaki Kobayashi; Sayuki Oka; Narathon Khemasiri; Yohei Yomogida; Kazuki Nagashima
  ACS Applied Nano Materials, 14 Feb. 2025
  Scientific journal
• Mechanochemical Synthesis of Potassium–Ion Conductor K₃SbS₄
  Takehiro NAKAO; Chihiro OKUSHIMA; Takuya KIMURA; Akira NASU; Kota MOTOHASHI; Atsushi SAKUDA; Akitoshi HAYASHI
  Electrochemistry, 2025, [Peer-reviewed]
  Scientific journal
• Reversible Phase Transition in Ruddlesden-Popper-type Oxysulfide Y₂Ti₂O₅S₂ for Lithium-Ion Battery Anodes
  Naoto TAKADA; Akira NASU; Hiroaki KOBAYASHI; Masaki MATSUI
  Electrochemistry, 2025
  Scientific journal
• All-solid-state Sodium-ion Batteries: A Leading Contender in the Next-generation Battery Race,全固态钠离子电池:次世代电池竞赛中的领先竞争者
  Zhu, R.-J.; Li, Z.-C.; Zhang, W.; Nasu, A.; Kobayashi, H.; Matsui, M.
  Journal of Electrochemistry, 30, 12, 19 Jun. 2024
  Scientific journal
• Chemical Compatibility of Solid-State Electrolytes with Hydroflux Cathode-Coating Process
  Onoue, K.; Watanabe, T.; John, C.C.; Nasu, A.; Kobayashi, H.; Matsui, M.
  Electrochemistry, 92, 7, 077002, 14 Jun. 2024
  Scientific journal
• High-Sodium-Concentration Sodium Oxythioborosilicate Glass Synthesized via Ambient Pressure Method with Sodium Polysulfides
  Otono, T.; Nasu, A.; Asakura, T.; Kowada, H.; Motohashi, K.; Tatsumisago, M.; Sakuda, A.; Hayashi, A.
  Inorganic Chemistry, 63, 10, 11 Mar. 2024
  Scientific journal
• Heat Treatment of Mechanochemically Prepared Amorphous LiNi_0.5Mn_1.5O₄-Li₂SO₄ as High-Voltage Positive-Electrode Material
  Kwon, N.; Nasu, A.; Kowada, H.; Motohashi, K.; Tatsumisago, M.; Sakuda, A.; Hayashi, A.
  ACS Applied Energy Materials, 7, 5, 11 Mar. 2024
  Scientific journal
• Synthesis of High-Sodium-Content Oxythiosilicate Glass Electrolytes Via Sodium Polysulfide
  Tomoya Otono; Akira Nasu; Taichi Asakura; Hiroe Kowada; Kota Motohashi; Atsushi Sakuda; Masahiro Tatsumisago; Akitoshi Hayashi
  Advanced Sustainable Systems, 2024
  Scientific journal
• Utilizing reactive polysulfides flux Na₂S_x for the synthesis of sulfide solid electrolytes for all-solid-state sodium batteries
  Nasu, A.; Otono, T.; Takayanagi, T.; Deguchi, M.; Sakuda, A.; Tatsumisago, M.; Hayashi, A.
  Energy Storage Materials, 67, 2024
  Scientific journal
• Trigger of the Highly Resistive Layer Formation at the Cathode-Electrolyte Interface in All-Solid-State Lithium Batteries Using a Garnet-Type Lithium-Ion Conductor
  Onoue, K.; Nasu, A.; Matsumoto, K.; Hagiwara, R.; Kobayashi, H.; Matsui, M.
  ACS Applied Materials and Interfaces, 03 Nov. 2023
  Scientific journal
• Hard Carbon–Sulfide Solid Electrolyte Interface in All-Solid-State Sodium Batteries
  Wataru YOSHIDA; Akira NASU; Kota MOTOHASHI; Masahiro TATSUMISAGO; Atsushi SAKUDA; Akitoshi HAYASHI
  Electrochemistry, 91, 3, 037009, 037009, The Electrochemical Society of Japan, 31 Mar. 2023
  Scientific journal
• Mechanochemical Synthesis and Characterization of K2+xZr1-xYxCl6: Potassium-Ion-Conducting Chloride
  Yuya Okada; Akira Nasu; Takuya Kimura; Hirofumi Tsukasaki; Shigeo Mori; Hamdi Ben Yahia; Kota Motohashi; Atsushi Sakuda; Akitoshi Hayashi
  Chemistry of Materials, 2023
  Scientific journal
• Mechanochemical synthesis of Na3NbS4 metastable phase as positive electrode materials for all-solid-state sodium batteries
  Akira Nasu; Atsushi Sakuda; Masahiro Tatsumisago; Akitoshi Hayashi
  Journal of the Ceramic Society of Japan, 130, 9, 789, 793, 01 Sep. 2022
  Scientific journal
• Iron Sulfide Na2FeS2 as Positive Electrode Material with High Capacity and Reversibility Derived from Anion-Cation Redox in All-Solid-State Sodium Batteries
  Akira Nasu; Atsushi Sakuda; Takuya Kimura; Minako Deguchi; Akihisa Tsuchimoto; Masashi Okubo; Atsuo Yamada; Masahiro Tatsumisago; Akitoshi Hayashi
  SMALL, 18, 42, Sep. 2022
  English, Scientific journal
• Amorphous Positive Electrode Materials Prepared Using LiMn(1.5)Ni(0.5)O4 and Lithium Oxyacid Salts
  Neung Kwon; Akira Nasu; Atsushi Sakuda; Masahiro Tatsumisago; Akitoshi Hayashi
  CHEMISTRY LETTERS, 51, 8, 815, 818, Aug. 2022
  English, Scientific journal
• Preparation and characterization of Na2.88Sb0.88W0.12S4-xOx solid electrolyte
  Takuma Takayanagi; Akira Nasu; Fumika Tsuji; Kota Motohashi; Atsushi Sakuda; Masahiro Tatsumisago; Akitoshi Hayashi
  JOURNAL OF THE CERAMIC SOCIETY OF JAPAN, 130, 7, 498, 503, Jul. 2022
  English, Scientific journal
• Na2S-NaI solid solution as positive electrode in all-solid-state Na/ S batteries
  Yushi Fujita; Akira Nasu; Atsushi Sakuda; Masahiro Tatsumisago; Akitoshi Hayashi
  JOURNAL OF POWER SOURCES, 532, Jun. 2022
  English, Scientific journal
• Room-Temperature Preparation of All-Solid-State Lithium Batteries Using TiO(2 )Anodes and Oxide Electrolytes
  Hiroyuki Usui; Yasuhiro Domi; Shin-ichiro Izaki; Akira Nasu; Atsushi Sakuda; Akitoshi Hayashi; Hiroki Sakaguchi
  JOURNAL OF PHYSICAL CHEMISTRY C, 126, 25, 10320, 10326, Jun. 2022
  English, Scientific journal
• Formation of Passivate Interphases by Na3BS3-Glass Solid Electrolytes in All-Solid-State Sodium-Metal Batteries
  Akira Nasu; Takeaki Inaoka; Fumika Tsuji; Kota Motohashi; Atsushi Sakuda; Masahiro Tatsumisago; Akitoshi Hayashi
  ACS APPLIED MATERIALS & INTERFACES, 14, 21, May 2022
  English, Scientific journal
• Mechanochemical synthesis of amorphous MoSx (x=3, 4, 5, 6, and 7) electrode for all-solid-state sodium battery
  Gaku Shirota; Akira Nasu; Minako Deguchi; Atsushi Sakuda; Masahiro Tatsumisago; Akitoshi Hayashi
  JOURNAL OF THE CERAMIC SOCIETY OF JAPAN, 130, 4, 308, 312, Apr. 2022
  English, Scientific journal
• Molybdenum polysulfide electrode with high capacity for all-solid-state sodium battery
  Gaku Shirota; Akira Nasu; Minako Deguchi; Atsushi Sakuda; Masahiro Tatsumisago; Akitoshi Hayashi
  SOLID STATE IONICS, 376, Mar. 2022
  English, Scientific journal
• Sodium-Ion Conducting Solid Electrolytes in the Na2S-In2S3 System
  Kota Motohashi; Akira Nasu; Takuya Kimura; Chie Hotehama; Atsushi Sakuda; Masahiro Tatsumisago; Akitoshi Hayashi
  ELECTROCHEMISTRY, 90, 6, 2022
  English, Scientific journal
• Mechanochemical Synthesis of Pyrite Ni1-xFexS2 Electrode for All-solid-state Sodium Battery
  Gaku Shirota; Akira Nasu; Atsushi Sakuda; Minako Deguchi; Kota Motohashi; Masahiro Tatsumisago; Akitoshi Hayashi
  ELECTROCHEMISTRY, 90, 3, 2022
  English, Scientific journal
• Mechanochemically Prepared Highly Conductive Na2.88Sb0.88W0.12S4-NaI Composite Electrolytes for All-Solid-State Sodium Battery
  Takuma Takayanagi; Akira Nasu; Fumika Tsuji; Atsushi Sakuda; Masahiro Tatsumisago; Akitoshi Hayashi
  ELECTROCHEMISTRY, 90, 4, 2022
  English, Scientific journal
• Crystallization behaviors in superionic conductor Na3PS4
  Hiroshi Nakajima; Hirofumi Tsukasaki; Jiong Ding; Takuya Kimura; Takumi Nakano; Akira Nasu; Akihiko Hirata; Atsushi Sakuda; Akitoshi Hayashi; Shigeo Mori
  JOURNAL OF POWER SOURCES, 511, Nov. 2021
  English, Scientific journal
• Mechanochemical synthesis and characterization of Na3-xP1-xWxS4 solid electrolytes
  Fumika Tsuji; Akira Nasu; Atsushi Sakuda; Masahiro Tatsumisago; Akitoshi Hayashi
  JOURNAL OF POWER SOURCES, 506, Sep. 2021
  English, Scientific journal
• Electrode performance of amorphous MoS3 in all-solid-state sodium secondary batteries
  Gaku Shirota; Akira Nasu; Minako Deguchi; Atsushi Sakuda; Masahiro Tatsumisago; Akitoshi Hayashi
  JOURNAL OF POWER SOURCES ADVANCES, 10, Aug. 2021
  English, Scientific journal
• Preparation and characterization of sodium-ion conductive Na3BS3 glass and glass-ceramic electrolytes
  Fumika Tsuji; Akira Nasu; Chie Hotehama; Atsushi Sakuda; Masahiro Tatsumisago; Akitoshi Hayashi
  MATERIALS ADVANCES, 2, 5, 1676, 1682, Mar. 2021
  English, Scientific journal
• Mechanochemical synthesis of cubic rocksalt Na2TiS3 as novel active materials for all-solid-state sodium secondary batteries
  Akira Nasu; Misae Otoyama; Atsushi Sakuda; Akitoshi Hayashi; Masahiro Tatsumisago
  JOURNAL OF THE CERAMIC SOCIETY OF JAPAN, 127, 8, 514, 517, Aug. 2019
  English, Scientific journal
• Amorphous Na2TiS3 as an Active Material for All-solid-state Sodium Batteries
  Akira Nasu; Misae Otoyama; Atsushi Sakuda; Akitoshi Hayashi; Masahiro Tatsumisago
  CHEMISTRY LETTERS, 48, 3, 288, 290, Mar. 2019
  English, Scientific journal

• Synthesis of Na₄SiS₄-SiO₂ glass electrolytes via sodium polysulfide melts
  音野智哉; 奈須滉; 朝倉大智; 本橋宏大; 作田敦; 林晃敏, 日本セラミックス協会年会講演予稿集(Web), 2024, 2024
• Crystallization of K₃SbS₄ glass electrolytes prepared by the mechanochemical method
  仲尾健宏; 奥島千尋; 木村拓哉; 奈須滉; 本橋宏大; 作田敦; 林晃敏, 日本化学会春季年会講演予稿集(Web), 103rd, 2023
• Preparation of all-solid-state sodium batteries using composite negative electrode containing black phosphorus active material
  重野天郁; 吉田航; 奈須滉; 本橋宏大; 作田敦; 林晃敏, 日本化学会春季年会講演予稿集(Web), 103rd, 2023
• Potassium-ion conductor K₃SbS₄ prepared by the mechanochemical method
  仲尾健宏; 奥島千尋; 木村拓哉; 奈須滉; 本橋宏大; 作田敦; 林晃敏, 電池討論会PDF要旨集(CD-ROM), 64th, 2023
• Negative electrode performance of silicon particles coated with carbon nanotubes in sulfide-based all-solid-state cells
  栗岡英司; 奈須滉; 南里佳寿; SUN Rende; 和田拓也; 福井弘司; 本橋宏大; 作田敦; 林晃敏, 電池討論会PDF要旨集(CD-ROM), 64th, 2023
• Characterization of Sodium-Ion Conducting Sulfide Electrolytes in the Na₂S-In₂S₃ System
  本橋宏大; 奈須滉; 木村拓哉; 保手浜千絵; 作田敦; 辰巳砂昌弘; 林晃敏, 固体イオニクス討論会講演要旨集, 48th, 2022
• Ambient pressure synthesis of SiO₂-added Na₃BS₃ glass via sodium polysulfide
  音野智哉; 奈須滉; 本橋宏大; 作田敦; 林晃敏, ガラスおよびフォトニクス材料討論会講演要旨集, 63rd, 2022
• Synthesis of Na_2.88Sb_0.88W_0.12S₄ solid electrolyte under ambient pressure using sodium polysulfides
  音野智哉; 城田岳; 奈須滉; 本橋宏大; 作田敦; 林晃敏, 電池討論会PDF要旨集(CD-ROM), 63rd, 2022
• Mechanochemical synthesis and characterization of K_2+xZ_r1-xY_xCl₆ solid electrolytes
  岡田侑也; 奈須滉; 木村拓哉; 塚崎裕文; 森茂生; 本橋宏大; 作田敦; 林晃敏, 電池討論会PDF要旨集(CD-ROM), 63rd, 2022
• Development of Na₄SiS₄ glass electrolyte with reduction stability for all-solid-state sodium metal batteries
  奈須滉; 高柳拓真; 稲岡嵩晃; 本橋宏大; 作田敦; 辰巳砂昌弘; 林晃敏, 電池討論会PDF要旨集(CD-ROM), 63rd, 2022
• Development of synthesis process of Na₃BS₃ glass electrolyte using sodium polysulfides
  音野智哉; 城田岳; 奈須滉; 本橋宏大; 作田敦; 林晃敏, 化学電池材料研究会ミーティング講演要旨集, 23rd (CD-ROM), 2022

• 一般教育演習(ﾌﾚｯｼｭﾏﾝｾﾐﾅｰ), 2024年, 学士課程, 全学教育

• Oct. 2022 - Present
  電池技術委員会
• Jul. 2020 - Present
  日本セラミックス協会
• Jan. 2019 - Present
  電気化学会
• Sep. 2024
  The Solid State Ionics Society of Japan

• 酸硫化物における特異的なユニット形成と結晶化速度が及ぼすガラス化挙動への影 響解明
  ガラス研究振興プログラム
  Apr. 2025 - Mar. 2028
  ニューガラスフォーラム/ガラス産業連合会, 北海道大学, Principal investigator
• 蓄電固体時代の次世代「ものづくり」ネットワークの構築
  国際的な科学技術共同研究などの推進 先端国際共同研究推進事業 単独公募(次世代)
  Dec. 2024 - Mar. 2027
  大野 真之
  「1.物質探索と合成」では基盤となる蓄電固体材料の探索と多角的合成の深化により物質の具現化を担う「ものづくり」を、「2.高度解析と機構解明」では高度な平均・局所・動的構造による機構解明をもって「ものづくり」を支える設計指針の探索を、そして「界面現象理解」では界面における物質間親和性の理解に基づいた物質利用に主眼を置く解析手法の「ものづくり」を、それぞれ計画している。日本側研究者とカウンターパートの協業はトピックごとにキックオフするが、on-siteでの協業を通して、個人単位でのより密な議論を行い、合成と観測それぞれへの要求の深い理解を実現する。その後、相互理解をベースに、日本側・カウンターパート両者の強みである合成や計測の適用範囲の拡張を目指す。
  科学技術振興機構, 東北大学, Coinvestigator
• 多様な元素を含む未踏領域における耐還元性を有する硫化物固体電解質の探索
  科学研究費助成事業
  Apr. 2024 - Mar. 2027
  奈須 滉
  日本学術振興会, 若手研究, 北海道大学, 24K17760
• 遷移金属硫化物におけるナトリウム含有型活物質モデルの新規構築
  科学研究費助成事業 特別研究員奨励費
  24 Apr. 2020 - 31 Mar. 2023
  奈須 滉
  ナトリウム二次電池の正極活物質の中でも、構成元素として豊富で普遍的な元素を含む鉄系硫化物FeS2は、安価かつ実用的な材料として報告されている。しかし、初期放電時の不可逆な構造変化や、構造中のナトリウムイオンの拡散の遅さから高出力化は容易ではない。本研究では、ナトリウムイオンが拡散可能な結晶構造を有し、実験的にも10-6 S cm-1程度のイオン伝導性を示す材料としてナトリウム含有型の鉄系硫化物Na2FeS2に着目し、全固体ナトリウム電池への適用とその充放電機構について解析した。まず、Na2FeS2の全固体電池への適用では、300サイクル以上の間、300 mAh g-1の高容量を保持することを明らかにした。高い電極特性を示す要因の特定のために、XRD測定、XPS測定、57Fe Moessbauer測定を用いて、結晶構造変化と電子状態変化を解析した。その結果、充放電中にカチオンである鉄、アニオンの硫黄のどちらもが充放電に関与しており、酸化還元対の増加によって、高容量が実現していることが明らかになった。また、Na2FeS2の結晶構造中で、陵共有によって鎖状となっているFeS4四面体が充電・放電を通して維持されることで、イオン伝導経路が維持されていることが分かった。以上の結果を踏まえて、正極中のイオン伝導助剤である固体電解質を利用することなく、Na2FeS2のみを圧粉成形することで正極とした全固体電池の構築・作動に成功し、電池全体の高エネルギー密度化を実現した。
  日本学術振興会, 特別研究員奨励費, 20J23722