Science on Interfacial Ion Dynamics for Solid State Ionics Devices

Newsletter Vol.7
March 2023

Interface lonics toward
Sustainable Society
2019 – 2023 Japan Society for the Promotion of Science
Grant-in-Aid for Scientific Research on Innovative Areas

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Preface | Contents

Preface
As exemplified by the enthusiasm for the FIFA World Cup and imaginative
discussions at on-site international conferences, excitement and creativity
generated through face-to-face international contacts are recovering in ourdaily lives. We are planning to have an on-site international symposium as aworkshop at ICMAT (Singapore) on June 30, 2023. This 2023 is the last yearof our project. We will further advance academic research in Interface
IONICS, especially by promoting global personnel exchange, face-to-facemeetings, and communication among young scientists. Finally, I sincerely
hope that international problems such as wars and inflation will be settled
peacefully as soon as possible and that peaceful life will be restored
throughout the world.
Yasutoshi Iriyama, Principal Investigator
Nagoya University

Contents

Member Introductions
		 Researchers

3		 Research Assistants

5

Research Achievements
		 Model Interface (Gp-A01)
Advanced Analysis (Gp-A02)

6
7

		 Computational & Data Science (Gp-A03)

8

Design of Functional Interface (Gp-A04)

9

Activity Reports		 Co-organized Symposium “Science on Interfacial Ion
		 Dynamics for Solid State Devices”

10		 The 4th Public Symposium on Interface IONICS

10

		 Domestic Training Program Reports

11Member Introductions 3

Member Introductions
Researchers
Kota Motohashi
Project Assistant Professor (Hayashi Gr.)/
Osaka Metropolitan Univ. / Solid-state ionics

I obtained my PhD from Tohoku University in 2021 and moved to the
inorganic chemistry group at Osaka Prefecture University as a project
assistant professor under Professor Akitoshi Hayashi. My research
focuses on the development of solid electrolytes. In my PhD course, I
proposed a new material design using a flexible molecular cation as a hostcation and demonstrated it through F−-ion conduction in NH4MgF3 - and(NH4)2MgF4-based materials. The samples exhibited relatively high F−-ion
conductivity. I also developed cation (Na+, K+, Li+)-conducting materials,
including sulfide Na+-conducting materials in the system Na2S–In2S3. I
developed two new metastable phases and amorphous specimens using amechanochemical method. The electrical conductivity of the75Na2S·25In2S3 glass was 6.8×10−6 S cm−1 at 25°C (figure). I would like tocontribute to the development of inorganic materials for solid-state ionics
devices.

Figure. Temperature dependence of the electricalconductivities of the 75Na 2S·25In 2S 3 glass and the
Na 5InS 4 and NaInS 2 metastable phases.

Gen Hasegawa
NIMS Postdoctoral Researcher (Kuwata Gr.)/NIMS / Solid state ionics, Solid state physics

I received my PhD from Tohoku University in 2021. Since April 2021,
I have been a postdoctoral researcher at NIMS. My research is focused on
the development of visualization and quantitation techniques of Li+-ion
transport in all-solid-state batteries. I aim to establish visualization
techniques by combining the 6Li isotope exchange analysis technique andthe high-spatial-resolution visualization capability of secondary ion mass
spectrometry (SIMS). Recently, as a first step, I successfully visualized
grain-boundary diffusion in solid electrolytes as a rate-limiting process for
Li+-ion transport. In the future, I hope to further develop this visualization
technology to lead to a breakthrough in interface formation technology for
all-solid-state batteries.

Figure 1. The TOF.SIMS 5 (IONTOF) apparatus.

Figure 2. Schematic of the SIMS analysis ofdiffusion.

6

Li

4

Member Introductions

Huu Duc Luong
Post Doc. (Tateyama Gr.) /National Institute for Materials Science /First-principles simulations

I obtained my doctoral degree in Quantum Engineering Design at the
School of Engineering, Osaka University. In my PhD course, I focused on
the small-polaron effect on Na+-ion migration inside some layered andpolyanionic cathode materials with potential applications in Na+-ion
rechargeable batteries by carrying out first-principles simulations. In 2021,
I started my postdoctoral fellowship in the Tateyama group and compared
the electronic and ionic conductivities of two representative layered
cathode materials, LixCoO2 and LixNiO2, and investigated the correlation
between them. We expect that the larger orders of the ratio ζ as well as the
product κ of electronic and ionic conductivities (ζ ≈ 10 6 and κ ≈ 10−2) can beused as a target measure for the design of cathode materials. In the near
future, I will focus on the mechanism of degradation on the surface ofsome cathode materials as well as on interfacial reactions between
cathodes and solid electrolytes for Li+-ion rechargeable batteries.

Figure 1. Comparison of the electronic conductivity(σ e) and Li+-ionic conductivity (σ Li) in Li x (Co,Ni)O 2.

Jiyoung Ock
Post Doc. (Dokko Gr.) /Yokohama National Univ. / Organic electrolytes

I am currently a postdoctoral researcher in the electrochemistry lab at
Yokohama National University, supervised by Prof. Kaoru Dokko. In 2021, I
received my PhD in Chemistry and Life Science in the same group. During
the Interface IONICS project, I learned about and gained insight into Li+-ion
transport/transfer mechanisms at solid electrolyte/liquid electrolyte andelectrode/electrolyte interfaces. Specifically, as liquid electrolytes, I usedhighly concentrated electrolytes such as sulfolane (SL), which ourgroup previously investigated for its unique Li+-ion hopping/exchangemechanism in the high Li+ salt concentration region (Figure. 1). In
liquid electrolytes, changing the ionic species alters the resultant
ionic interaction in the solvation shell; their physicochemical andelectrochemical properties therefore also change. To understand how thedifferent ionic species of highly concentrated electrolytes affects solvation
structures and their properties, we used various techniques, including theassembly of two-, three-, or four-probe cells, and characterized theelectrolytes using a series of techniques. Accordingly, we achieved a highrate performance (98 mAh g−1 at 13.3 mA cm−2) for a Li/LiCoO2 cell withweakly coordinated gel electrolytes of [Li(SL)3][FSA] (FSA: N(SO2F)2)(Figure. 2). On the basis of these experiences, I would like to continue
research toward achieving high battery performance.

Figure 1. Promotion of Li+-ion hopping in highly
concentrated sulfolane-based electrolytes.

Figure 2. Rate performance in [Li/LiCoO 2] cells with
PVDF–HFP gel electrolytes.

Member Introductions 5

Researchers Assistants
Yixin Chen
Research Assistant /Kyushu Univ. (Inoishi Gr.)The development of composite electrodes for all-solid-state batteriesrequires mixing electrode materials with a solid electrolyte to supply anionic conduction pathway; however, the solid electrolyte does notcontribute to the capacity of the battery and might cause a side reaction.
Hence, our group focuses on active materials that can generate a solid
electrolyte through an electrode reaction. The electrode performanceachieved via the mechanism of in situ solid electrolyte formation is similar
to that achieved with a composite electrode material mixed with a solid
electrolyte in advance. Meanwhile, this method can substantially increase
the amount of active material included in the electrode mixture andimprove the capacity of batteries.
We have also reported some successful cases of in situ solid electrolyte
formation in active materials such as Mg(BH4)2 and MgH2. As shown in
Figure, LiBH4 is formed as a solid electrolyte by lithiation of a Mg(BH4)2
anode. Importantly, the Li+-ion conductivity of a solid electrolyte formedin situ is considered to play a critical role in the charge–discharge
performance of batteries. However, other factors are not clearly
understood. In the future, we aim to further investigate the mechanism ofin situ solid electrolyte formation and develop an anode material with highcapacity by increasing its active material content.

Figure. 11B MAS NMR spectra of a Mg(BH 4)2 anode.

Ding Jiong
Research Assistant/
Osaka Metropolitan Univ. (Mori Gr.)I graduated from Fuzhou University in 2018 and then moved to Japan,
joining the Mori Lab at Osaka Prefecture University in 2019. Over the past
3 years, my research has focused on analyzing the microstructure of
all-solid-state battery materials using transmission electron microscopy(TEM). TEM observation is a helpful analytical method because it enables
us to understand the ionic conduction mechanism of all-solid-statebatteries from a microscopic perspective. For example, Figure 1 shows adark-field image of a Li2S–(66.7Li2O–33.3LiI) electrode after its firstdischarge and the inset image is the crystal-size distribution data
extracted from several dark-field images. A smaller crystal size (<10 nm)
can substantially improve the charge–discharge cycling performance. In
addition, electron diffraction patterns can be used to conduct pair
distribution function (PDF) analysis, which is a useful analytical method todetermine the microstructure of a material in the amorphous (glass) state.
Figure 2 shows the PDF analysis result for Li3PS4 glass. The prominent
peaks at 2.03, 2.64, and 3.39 Å imply the atomic pair distances of P–S,
Li–S, and S–S, respectively.

Figure 1. Dark-field image of a Li 2S–(66.7Li 2 O–33.3LiI) electrode after the firstdischarge. The inset shows the particle
size distribution.

Figure 2. PDF analysis of Li 3 PS 4 glass.

6

Research Achievements

Research Achievements
2022.7–2022.12

Gp-A01 Model Interface
Highlight 1 A01 and ALCA joint paper

Fabrication of oxide-based all-solid-state batteries by a sintering process
based on function sharing of solid electrolytes
M. Sakakura, K. Mitsuishi, T. Okumura, N. Ishigaki, Y. Iriyama
ACS Appl. Mater. Interfaces. vol. 14, pp. 48547–48557 (2022)
https://doi.org/10.1021/acsami.2c10853

Abstract
2 μm-thick LGVO films are prepared on LLZ pellets
by aerosol deposition. These two solid electrolytes
adhere well through Ge diffusion without significant
interfacial resistance. The LLZ–LGVO multilayer is
combined with a LiCoO2 positive electrode and alithium metal anode through annealing at 700 °C. The
resultant all-solid-state battery can undergo repeatedcharge–discharge reactions for over 100 cycles at 25
or 60 °C. The LGVO coating suppresses the increases
in the resistance from the solid electrolyte andinterfacial resistance induced by annealing by ca. 1/40.
As with sulfide-based all-solid-state batteries, function

sharing of solid electrolytes will be a promising methodfor developing advanced oxide-based all-solid-statebatteries through a sintering process. [Copyright 2022
American Chemical Society.]

Highlight 2 A01 and SOLiD-EV joint paper

Electronic properties of lithium-ion conductive amorphous lithium
phosphorus oxynitride
F. Nakayama, Y. Suzuki, K. Yoshikawa, S. Yamamoto, M. Sakakura, T. Ohnishi, Y. Iriyama
Chem. Commun. vol. 58, pp. 13262–13265 (2022)
https://doi.org/10.1039/d2cc05117f

Abstract
Li+ conductive amorphous LiPON films with different
compositions and chemical bonding states have been
prepared systematically by bias-controlled RF
magnetron sputtering with the aid of substrate coolingequipment. The CBMs of the LiPON films are
independent of the composition and chemical bonding
states, and the CBMs are lower than the work functionof Li. The VBM of the LiPON films depend on thechemical bonding state. In particular, when the LiPON
films contain Li2O over 10%, the elevation in the VBM is
detected experimentally probably because of thepresence of isolated oxygen, which leads to anarrowing of the band gap of less than 4 eV. The EF is
located almost midway of the band gap, and a larger
amount of bridging oxygen seems to relate with n-type
properties. These electronic properties will play animportant role in helping us to better understand thereaction mechanisms of SSBs and facilitate novel
material design for improved SSBs such as amorphous
coating materials in sulfide-based SSBs. [Reproducedwith permission of the Royal Society of Chemistry.]

Research Achievements 7

Gp-A02 Advanced Analysis
This group aims to understand, through advanced
and comprehensive analyses, unique ion transport/

storage phenomena that occur at solid-state interfaces.
Some of their recent topics are highlighted as follows.

Highlight 3

Visualization of sulfur chemical state of cathode active materials forlithium–sulfur batteries by tender X-ray spectroscopic ptychography
M. Abe, F. Kaneko, N. Ishiguro, T. Kubo, F. Chujo, Y. Tamenori, H. Kishimoto, Y. Takahashi
J. Phys. Chem. C. vol. 126, pp. 14047–14057 (2022)
https://doi.org/10.1021/acs.jpcc.2c02795

Abstract
Lithium–Sulfur batteries are rechargeable batteries
that have attracted much attention because of theirlarge theoretical capacity and the low cost of sulfur.
However, there is an obstacle to the development ofcathode materials for practical use: the reaction anddegradation mechanisms during the charge–discharge
process are not fully understood. In this study,
we demonstrated the visualization of the sulfur
chemical state of cathode active materials at a highspatial resolution using tender X-ray spectroscopic
ptychography. We measured the sulfurized poly(nbutyl methacrylate) (SPBMA) samples at the S K-edge(~2.47 keV) and successfully visualized the distributionof sulfur chemical states. We found that the

distribution of sulfur chemical states in SPBMA
particles is heterogeneous and that traces of thedischarge reaction exist near the particle surface. We
also found that the cathode composites accumulated
sulfur oxides, possibly due to side reactions between
sulfur and the electrolyte. [Reproduced with permissionof American Chemical Society.]

Highlight 4

Adaptive cation pillar effects achieving high capacity in Li-rich layeredoxide, Li2MnO3–LiMeO2 (Me = Ni, Co, Mn)
S. Hiroi, M. Oishi, K. Ohara, K. Shimoda, D. Kabutan, Y. Uchimoto
Small. vol. 18, 2203412 (2022)
https://doi.org/10.1002/smll.202203412

Abstract
To increase the capacity of positive electrodematerials, Li-rich layered oxides (LLO) are attracting
attention but have not yet been put to practical use.
The structural mechanisms through which LLO
materials to exhibit higher capacity than conventional
materials remain unclear because their disorderedphases make it difficult to obtain structural informationby conventional analysis. Our X-ray total scattering
analysis revealed a disordered structure consisting of
metal ions in octahedral and tetrahedral sites of Li
layers as a result of cation mixing after the extractionof Li ions. Metal ions in octahedral sites act as rigid
pillars. The metal ions move to the tetrahedral site of
the Li layer, which functions as a Li-layer pillar during Li
extraction, and return to the metal site during Li
insertion, facilitating Li diffusion as an adaptive pillar.

Adaptive pillars are the specific structural features thatdiffer from those of the conventional layered materials,
and their effects are responsible for the high capacity
of LLO materials. An essential understanding of thepillar effects will contribute to design guidelines forintercalation-type positive electrodes for nextgeneration LIBs. [Reproduced with permission of the
Authors licensed under CC-BY.]8

Research Achievements

Gp-A03 Computational & Data Science
To construct a new theoretical framework for Interface
IONICS, Gp-A03 has introduced two strategies: acomputational approach and a data science approach.
With the development of several novel techniques andextensive collaboration with the experimental groups(Gp-A01, -A02, and -A04), we have achieved newunderstanding of interfacial phenomena. Two of ourrecent computational studies have provided novel
insights into the mixing and migration of ions, leading
to a deeper understanding of ionics.

Highlight 5Computational studies on defect chemistry and Li-ion conductivity ofspinel-type LiAl5O8 as coating material for Li-metal electrodeS. Miyakawa, S. Matsuda, N. Tanibata, H. Takeda, M. Nakayama, T. Saito, S. Fukuchi
Sci. Rep. vol. 12, pp. 1–11 (2022)
https://doi.org/10.1038/s41598-022-20289-2

Abstract
Li-metal rechargeable batteries are an attractive
option for devices that require an extremely high specificenergy density. In this study, the Li-ion conductivity ofspinel-type LiAl5O8 was investigated using firstprinciples density functional theory and force field
molecular dynamics calculations, whose potential
parameters are optimized by cuckoo search algorithm.
The calculation results confirmed that stoichiometric
LiAl5O8 compounds do not exhibit Li-ion conductivity,
whereas off-stoichiometric compounds with excess Li
show long-range Li-ion diffusion with low activationenergy of 0.28 eV. [Reproduced with permission of The
Author(s) licensed under CC BY.]

Highlight 6

Facilitating ab initio configurational sampling of multicomponent solids
using an on-lattice neural network model and active learning
S. Kasamatsu, Y. Motoyama, K. Yoshimi, U. Matsumoto, A. Kuwabara, T. Ogawa
J. Chem. Phys. vol. 157, 104114 (2022)
https://doi.org/10.1063/5.0096645

Abstract
We propose a scheme for ab initio configurational
sampling in multicomponent crystalline solids where
Behler–Parinello type neural network potentials aretrained to predict the energies of relaxed structuresfrom the perfect lattice with configurational disorder.
An active learning scheme is employed to obtain a
training set with configurations of thermodynamic
relevance. The idea is demonstrated on the calculationof the temperature dependence of the degree of A/B
site inversion (DOI) in spinel oxides. The present
scheme may serve as an alternative to cluster
expansion for “difficult” systems, e.g., complex bulk orinterface systems with many components andsublattices that are relevant to many technologicalapplications today. [Reproduced with permission of the
Authors licensed under CC-BY.]

Research Achievements

Gp-A04 Design of Functional Interface
Gp-A04 designs innovative solid-state ionics
materials (SSIMs) through interface engineering.
With an increase in the concentration of grainboundaries,
chargecarriersareefficiently
accumulated in SSIMs, resulting in new structuresand functionalities. Such functionalities have been
applied to new solid-state ionics devices.
Collaborative studies with members of Gp-A02 and
Gp-A03 have further accelerated the development of
new solid-state devices.

Highlight 7Iron sulfide Na2FeS2 as positive electrode material with high capacity andreversibility derived from anion–cation redox in all-solid-state sodium
batteries
A. Nasu, A. Sakuda, T. Kimura, M. Deguchi, A. Tsuchimoto, M. Okubo, A. Yamada, M. Tatsumisago, A. Hayashi
Small. vol. 18, 2203383 (2022)
https://doi.org/10.1002/smll.202203383

Abstract
It is desirable for secondary batteries to have highcapacities and long lifetimes. This paper reports theuse of Na2FeS2 with a specific structure consisting ofedge-shared and chained FeS 4 as the host structure
and as a high-capacity active electrode material. An
all-solid-state sodium cell that uses Na2FeS2 exhibitsa high capacity of 320 mAh g−1 , which is close to thetheoretical two-electron reaction capacity of 323 mAh
g−1 , and operates reversibly for 300 cycles. The
excellent electrochemical properties of all-solid-statesodium cells are derived from the anion–cation redox
and rigid host structure during charging/discharging.
In addition to the initial one-electron reaction of

NaxFeS2 (1 ≤ x ≤ 2) activated Fe2+/Fe3+ redox as themain redox center, the reversible sulfur redox further
contributes to the high capacity. [Reproduced withpermission of the Authors licensed under CC-BY.]

Highlight 8

A near dimensionally invariable high-capacity positive electrode material
I. Konuma, D. Goonetilleke, N. Sharma, T. Miyuki, S. Hiroi, K. Ohara, Y. Yamakawa, Y. Morino, H. B. Rajendra, T. Ishigaki,
N. Yabuuchi
Nat. Mater. Vol. 22, pp. 225–234 (2023)
https://doi.org/10.1038/s41563-022-01421-z

Abstract
Delivering inherently stable lithium-ion batteries is a
key challenge. Electrochemical lithium insertion andextraction often severely alters the electrode crystal
chemistry, and this contributes to degradation withelectrochemical cycling. Moreover, electrodes do not
act in isolation, and this can be difficult to manage,especially in all-solid-state batteries. Therefore,
discovering materials that can reversibly insert andextract large quantities of the charge carrier (Li+), thatis, high capacity, with inherent stability during
electrochemical cycles is necessary. Here lithiumexcess vanadium oxides with a disordered rocksalt
structure are examined as high-capacity and long-life
positive electrode materials. Nanosized Li8/7Ti2/7V4/7O2
in optimized liquid electrolytes deliver a large reversible

capacity of over 300 mAh g−1 with two-electron V3+/V5+
cationic redox, reaching 750 Wh kg−1 versus metallic
lithium. Critically, highly reversible Li storage andno capacity fading for 400 cycles were observed inall-solid-state batteries with a sulfide-based solid
electrolyte. [Reproduced with permission from
Springer Nature.]9

10

Activity Reports

Activity Reports
Symposiums and Seminars

Co-organized Symposium “Science on Interfacial Ion Dynamics for
Solid State Devices” of the 2022 ECSJ Fall Meeting (Yokohama)Sep. 8–9, 2022

Prof. Kaoru Dokko, Yokohama National Univ.

The Symposium on Science on Interfacial Ion
Dynamics for Solid State Devices was held as aco-organized session during the 2022 Fall Meeting of theElectrochemical Society of Japan (ECSJ). There were 26
oral presentations, including invited lectures by Dr. K.
Ohara (JASRI), Prof. M. Inaba (Doshisha Univ.), Prof. Y.

Takahashi (Tohoku Univ.), Prof. T. Abe (Kyoto Univ.), andProf. S. Kasamatsu (Yamagata Univ.). Approximately 100
people attended the on-site meeting. In addition, morethan 100 people attended online. The meeting was afruitful opportunity to share recent results of the project.

Symposiums and Seminars

The 4th Public Symposium on Interface IONICS (Online)
Sep. 5, 2022

Prof. Naoaki Yabuuchi, Yokohama National Univ.

The 4th Public Symposium on Interface IONICS was
held online on Sep. 5, 2022. Nearly 300 people
registered for the symposium, which provided an
opportunity for scientists, engineers, and students todiscuss solid-state battery chemistry, including thediverse aspects of interfacial phenomena. The
symposium featured three invited talks from theacademic and industrial communities: Dr. Kohei
Uosaki, who is a fellow of NIMS; Prof. Yuichi Ikuhara,
who is a professor at The University of Tokyo; and Dr.
Masayuki Yamada, who is a manager at Maxell
Corporation. Interesting talks from these invited
speakers
stimulated
discussions
among
the
participants. Four representatives from each group in
the Interface IONICS project also delivered talks onrecent research advances in the project. In addition, aposter session was held for all members of Interface

IONICS using Zoom breakout rooms. Exciting
discussions were conducted throughout the poster
session in this symposium.

Interface IONICS Award Winners
Platinum Prize: Kana Onoue
Matsui Lab., Hokkaido Univ.
Phase-separation behavior of garnet-type lithium-ion conductors at positive electrodeinterfaces

Gold Prize: Takuya Katsumata
Amezawa Lab., Tohoku Univ.
Development of a synthesis
electrochemical reactors

technique

for

novel

mixed-anion

compoundsusingActivity Reports

Domestic Training Program Reports

Visiting the Yabuuchi Group at Yokohama National Univ.
Dec. 14, 2021
On Dec. 14, 2021, I visited Prof. Yabuuchi’s group at
Yokohama National University to learn an experimental
technique using a machine that applies hydrostaticpressures as high as 500 MPa (Servo Pressure 500,
Sugino Machine) to a sample during electrochemicalmeasurements. My study aims at understanding how
Li plating/stripping processes occur at interfaces
with oxide solid-state electrolytes under hydrostaticpressures greater than the theoretical strength of Li(approximately 250 MPa). Microscopic voids begin toform and grow at solid-state electrolyte/Li interfaces
during Li plating/stripping cycles. I am interested inwhether these microscopic voids still form or if void
formation is completely restricted under hydrostaticpressures greater than 250 MPa. I discussed how to

Ryo Kurose, Nagoya Univ.
perform operando electrochemical measurementsof our all-solid-state cells in the ultrahigh-hydrostaticpressure processing machine with Prof. Campéon of
Yabuuchi’s group. Thanks to this visit to Yabuuchi’sgroup, I was able to design a cell holder to enable
Li plating/stripping measurements under ultrahighhydrostatic-pressure conditions.

Domestic Training Program Reports

Visiting the Hayashi Group at Osaka Metropolitan University
Jul. 6–7, 2022
I visited Prof. Hayashi’s group at Osaka Metropolitan
University with two master course students, Hiroki
Adachi and Masaki Hayashi. We discussed the recent
advantages of sulfide electrolytes for solid-statebatteries with Prof. Hayashi, Assoc. Prof. Sakuda,
and Assist. Prof. Motohashi. They instructed us on
handling methods for sulfide electrolytes. As a resultof this experience, we were able to prepare composites
with our original polymeric materials. When thesulfide electrolyte surfaces are coated, the elastic
macromolecules can reduce the interface resistance

Assist. Prof. Kan Hatakeyama-Sato, Waseda Univ.
and enhance robustness against water. We are gratefulto the laboratory members and to the Interface IONICS
project for the opportunities to begin this new research.

Domestic Training Program Reports

Visiting the Kasamatsu Lab at Yamagata Univ.
Jul. 27–29, 2022
I visited Assoc. Prof. Kasamatsu’s lab at Yamagata
University to learn about a computational science
technique known as abICS. This technique is a software
framework for rapidly studying machine-learningmodels that reproduce first-principles calculations
and statistical thermodynamic sampling for irregularsystems and is a powerful analysis tool in the field ofmaterials science. Throughout these 3 days, we had
the opportunity to learn abICS computational methods
using a supercomputer at the Institute for Solid State
Physics of The University of Tokyo and to discuss theinterface model. We hope that this computational
science and technology will be useful for analyzing

Mizuki Tsunashima, Tokyo Univ. of Science
battery materials in our laboratory. I am grateful to theInterface IONICS project for providing such beneficial
collaboration opportunities.

Left: Assoc. Prof. Kasamatsu, right: M. Tsunashima

11

Newsletter vol.7
Publisher/Contact
Office for Scientific Research on Innovative Areas:
Science on Interfacial Ion Dynamics for Solid State Ionics Devices
TEL: +81-52-789-3235
E-mail: office@int-ionics.material.nagoya-u.ac.jp
https://interface-ionics.jp/en/index.html

Date of issue: March 2023