Ionics at Solid-Solid Interfaces in All-Solid-State Batteries

2021 Fiscal Year Final Research Report

• Project/Area Number: 19H02603
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 29020:Thin film/surface and interfacial physical properties-related
• Research Institution: Nippon Institute of Technology
• Principal Investigator: SHIRAKI SUSUMU 日本工業大学, 基幹工学部, 教授 (80342799)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 全固体電池 / 界面 / 薄膜

Outline of Final Research Achievements

All-solid-state batteries are expected to be used as large lithium batteries for automotive applications and stationary storage batteries. In this study, we developed an all-in-vacuum fabrication and in-situ evaluation system for thin-film all-solid-state batteries, and fabricated epitaxial thin films of battery materials such as cathode, anode, and solid electrolyte. Thin-film all-solid-state batteries were also fabricated using 5V-class cathode material (lithium nickel manganate), solid electrolyte (lithium phosphate), and anode lithium, and the resistance of the electrode/electrolyte interface was evaluated.

Free Research Field

表面・界面科学

Academic Significance and Societal Importance of the Research Achievements

今回の成果により、電池材料の薄膜とそれらを積層した薄膜型全固体電池の作製に関する知見、ノウハウを得ることができました。また、薄膜技術や真空技術などの、これまでに電池研究で利用されていなかった技術や手法、アプローチが、電池の基礎研究に極めて有効であることも分かりました。これらの取り組みが拡まり、大きな技術革新につながることが期待されます。