Portrait of Dr. Yuki Tanaka Research Excellence

Innovation & Technology

Dr. Yuki Tanaka, PhD

Associate Professor of Materials Science

PhD in Materials Science

Location

Tokyo, Japan

Published

August 18, 2026

Publication ID

ATR-2026-00463

Credential status

Institutional Reference

01 · Introduction

Academic journey

Yuki Tanaka works on solid-state ion conductors, a field with a long history of laboratory results that do not survive contact with a production line. Her laboratory is unusual in that it maintains a pilot-scale coating facility alongside its synthesis benches — an expensive decision she defends on the grounds that most of the interesting failures occur at that transition.

She trained in applied chemistry at Tokyo, took her doctorate on grain-boundary transport, and spent two years at a battery manufacturer before returning to academic research with a considerably revised sense of which problems mattered.

Her group holds four granted patents, three of them concerning process rather than composition.

A material that performs beautifully and cannot be made at scale is a publication, not a technology. — Dr. Yuki Tanaka
02 · Qualifications

Academic credentials

2014

PhD in Materials Science

Grain-boundary transport

The University of Tokyo · Japan

2010

MEng Applied Chemistry

Solid-state chemistry

The University of Tokyo · Japan

2008

BEng Applied Chemistry

The University of Tokyo · Japan

03 · Research

Doctoral research

Research title

Grain-Boundary Engineering in Sulfide Solid Electrolytes for Scalable Manufacture

Abstract

The research programme investigates the relationship between grain-boundary structure and ionic transport in sulfide solid electrolytes, with specific attention to whether favourable structures can be preserved through industrial coating processes.

Problem statement

Sulfide solid electrolytes offer high ionic conductivity but degrade during the mechanical and thermal steps of electrode manufacture. Laboratory-optimised compositions consistently underperformed after processing, and the mechanism was poorly characterised.

Research methodology

Combined synthesis, in-situ characterisation during simulated processing, and pilot-scale roll-to-roll coating trials, with transport properties measured before and after each processing stage across 47 composition variants.

Major findings

A controlled secondary phase at the grain boundary preserved conductivity through coating, with post-process conductivity retention improving from a baseline of 34 percent to 89 percent. The mechanism was identified as suppression of interfacial decomposition under mechanical stress.

Academic contribution

The work establishes processability as a designable material property in this class and provides the mechanism underlying it.

Department
Department of Materials Engineering
University
The University of Tokyo
Completion year
2014
04 · Bibliography

Publications

3 works recorded on this profile, as provided or externally referenced.

01

Journal Article

Grain-boundary phase control preserves conductivity through roll-to-roll coating

Tanaka, Y., Sato, K., Ibrahim, N.

Nature Energy, 2023, Vol. 8, pp. 912–923

02

Journal Article

Processability as a design property in sulfide solid electrolytes

Tanaka, Y.

Advanced Materials, 2022, Vol. 34, No. 29, pp. 2201884

03

Journal Article

Interfacial decomposition under mechanical stress in solid electrolytes

Tanaka, Y., Sato, K.

Chemistry of Materials, 2021, Vol. 33, No. 14, pp. 5502–5514

05 · Recognition

Achievements & recognitions

Patent

Grain-boundary phase control process for solid electrolytes

Japan Patent Office · 2022 · Japan

Granted process patent, licensed to two manufacturers.

Patent

Roll-to-roll coating method for sulfide composites

Japan Patent Office · 2023 · Japan

Granted process patent.

Academic Award

Materials Research Society Young Investigator Award

Materials Research Society · 2021 · International

For work on processable solid electrolytes.

Research Grant

Principal Investigator, Energy Storage Programme

Japan Science and Technology Agency · 2020 · Japan

Programme grant supporting pilot-scale facility.

06 · Measures

Research impact

Figures as submitted or externally referenced at the time of publication. Bibliometric measures vary between indexing services and should be read as indicative rather than definitive.

3,140

Citations

27

h-index

68

Research Papers

4

Patents

11

Students Supervised

07 · Practice

Career & professional journey

2019 — Present

Associate Professor

The University of Tokyo

Tokyo, Japan

Leads a laboratory maintaining both synthesis benches and a pilot coating facility.

2014 — 2016

Senior Research Engineer

Sanyo Energy Materials

Osaka, Japan

Industrial research on electrode manufacture.

08 · Consequence

Impact & contribution

Tanaka's contribution has been to reframe electrolyte development around processability. Her group's sulfide-composite work demonstrated that a controlled grain-boundary phase could be maintained through roll-to-roll coating — the step at which comparable materials had previously degraded. Two manufacturers have licensed the associated process patents. Within the research field, her insistence on reporting pilot-scale results alongside laboratory measurements has been adopted by several competing groups.

11 · Verification

Credentials & references

ORCID ↗

0000-0000-0000-0004

Credential Provided
Institutional Reference

Basis of this record

Credentials on this profile are supported by a reference to an institutional page or record. Independent verification has not been completed. Corrections and updates may be requested at any time via our corrections page.

13 · Citation

Cite this profile

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