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KUWATA, Naoaki
305-0044 1-1 Namiki Tsukuba Ibaraki JAPAN [Access]


Research Outline
Electrochemical devices, such as lithium-ion batteries, operate by the diffusion of ions through a solid. We measure the diffusion coefficients of solid-state battery materials and analyze the ion dynamics in solids/interfaces. We are also developing in-situ measurement techniques to study ion transport mechanisms in solid-state batteries.

Experimental Techniques
Time-of-flight secondary ion mass spectrometry (TOF-SIMS), pulsed field gradient NMR (PFG-NMR), pulsed laser deposition (PLD) Electrochemical methods

Student Recruitment
The NIMS Graduate Research Assistantship is designed for doctoral students who aspire to a career as researchers in materials science. Those students appointed as NIMS Junior Researcher will enable to gain insight into their research career by working on latest research projects. The amount of support is approximately 200,000 yen per month for the doctoral program.


Figure 1: SIMS imaging of lithium isotope distribution. The change in the profile can be used to determine the lithium diffusion coefficient of the battery material. Figure 2: Thin film battery fabricated by pulsed laser deposition and the structural changes observed by in situ Raman spectroscopy.

PublicationsNIMS affiliated publications since 2004.

Research papers

Society memberships

The Physical Society of Japan, The Electrochemical Society of Japan, The Solid State Ionics Society of Japan

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