Kuwata Naoaki

クワタナオアキ | Kuwata Naoaki

Affiliation and department：
Job title： Group Leader
Other affiliations (1)：

Hokkaido University Graduate School of Chemical Sciences and Engineering Guest Professor

Homepage URL (1)： https://scholar.google.com/citations?user=9LrAu94AAAAJ&hl=ja

Research field (1)： Inorganic materials

Research keywords (6)： Solid state ionics , All-solid-state lithium battery , Diffusion coefficient , TOF-SIMS , NMR , Thin-film battery

Research theme for competitive and other funds (9)：

2021 - 2024 Study on diffusion mechanism of all-solid-state battery materials by using isotope exchange SIMS analysis and application to operando measurements
2019 - 2024 Integrated Studies on Interface Ionics by Advanced Analytical Techniques
2017 - 2020 Study of diffusion mechanism in lithium-ion battery materials by SIMS with isotope ion-exchange method
2015 - 2018 Development of methods for lithium self-diffusion coefficient measurements in mixed conductors using isotope exchange
2012 - 2015 Separation of ionic and electronic conductivity using all-solid-state thin-film battery techniques

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Papers (146)：

Gen Hasegawa, Youngseok Kim, Yoshinori Tanaka, Naoaki Kuwata, Kunimitsu Kataoka, Takahisa Ohno, Junji Akimoto, Kazunori Takada. Improvement of Lithium-Ion Conductivity by Hf Substitution in Lithium Tantalum Phosphate (LiTa₂PO₈) Solid Electrolyte. ACS Applied Energy Materials. 2024
Naoaki Kuwata, Gen Hasegawa. Pulsed Field Gradient Nuclear Magnetic Resonance Measurement of Lithium Diffusion in Solid Electrolytes. The Materials Research Society Series. 2024. 273-284
Arunkumar Dorai, Sangryun Kim, Naoaki Kuwata, Junichi Kawamura, Kazuaki Kisu, Shin-ichi Orimo. Understanding Ion Dynamics in Closoborate-Type Lithium-Ion Conductors on Different Time-Scales. The Journal of Physical Chemistry Letters. 2024
Gen Hasegawa, Naoaki Kuwata, Tsuyoshi Ohnishi, Kazunori Takada. Visualization and evaluation of lithium diffusion at grain boundaries in Li_0.29La_0.57TiO₃ solid electrolytes using secondary ion mass spectrometry. Journal of Materials Chemistry A. 2024. 12. 2. 731-738
Naoki Yoshida, Naoaki Kuwata, Gen Hasegawa, Kazunori Takada. Liquid phase penetration sintering of garnet-type solid electrolyte LLZTO. Solid State Ionics. 2023. 403. 116408-116408

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MISC (90)：

桑田直明, 長谷川源. New Technique for Quantifying Grain Boundary Diffusion in All Solid-State Battery Materials. 機能材料. 2024. 44. 9
瀬戸温人, 今泉優輝, 端健二郎, 桑田直明, 長谷川源, 松尾康光, 松井広志. Proton dynamics in Cs₃H(SeO₄)₂. 日本物理学会講演概要集(CD-ROM). 2024. 79. 1
長谷川源, 秋本順二, 大野隆央, 桑田直明. Improvement of lithium ion conductivity by Hf substitution in LiTa₂PO₈ solid electrolyte. 日本物理学会講演概要集(CD-ROM). 2024. 79. 1
長谷川源, 桑田直明. Diffusion analysis of bulk and grain boundary in solid electrolytes by lithium isotope imaging. 電池討論会PDF要旨集(CD-ROM). 2023. 64th
長谷川源, 桑田直明. Visualization and evaluation of lithium diffusion at grain boundaries in Li_0.29La_0.57TiO₃ polycrystals by SIMS. 日本物理学会講演概要集(CD-ROM). 2023. 78. 2

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Books (4)：

高性能リチウムイオン電池開発最前線 5V級正極材料開発の現状と高エネルギー密度化への挑戦
エヌ・ティー・エス 2013
全固体リチウムイオン二次電池の開発と製造技術
サイエンス&テクノロジー 2012
Frontiers of Research on All-Solid-State Batteries
シーエムシー出版 2011
Ionic motion in organic-inorganic hybrid materials." Protonics in Plastic Materials
Transworld Research Network 2007

Education (1)：

Professional career (1)：

Work history (11)：

2024/04 - 現在 National Institute for Materials Science Center for Green Research on Energy and Environmental Materials Group Leader
2021/04 - 現在 Hokkaido University Graduate School of Chemical Sciences and Engineering Guest Professor
2019/04 - 2024/03 National Institute for Materials Science Center for Green Research on Energy and Environmental Materials Principal Researcher
2019/09 - 2022/03 Kyoto University
2015/06 - 2019/03 Tohoku University Institute of Multidisciplinary Research for Advanced Materials Associate Professor

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