Dr. Yoshihiro (Yoshi) Yamazaki's research focuses on the multiple length scale ion, electron and electronic-hole transport characterization in metal oxides, energy materials, aiming for efficient solar-fuel and energy conversions. One of the ultimate challenges in materials science is to activate a useful materials function for a specific application. In particular, the production of efficient solar fuel in conjunction with inorganic materials makes use of unlimited solar energy even at night. A challenge is to unravel critical material and architectural parameters, in a wide range from sub-nanometer to macroscopic scale, that activates such energy functions.

We combine materials synthesis, thin-film fabrication techniques, electrochemical spectroscopy, mass-spectroscopy, thermogravimetry, in-situ high-temperature solid-state nuclear magnetic resonance (NMR), operando X-ray absorption spectroscopy (XAS), operando Fourier-transform infrared spectroscopy (FT-IR),   low-energy ion scattering (LEIS, only ten in the world!), secondary-ion mass spectrometory (SIMS), in situ high-temperature X-ray diffraction (XRD), scanning transmission electron microscopy (STEM), ab initio calculations, and machine learning. We correlate these fundamentals to energy functions in inorganic materials and electrochemical devices. We succeeded in developing a world-record fast and stable proton-conducting oxide at 400 C [open access & press released].

To take advantage of machine learning prediction for the properties of new materials and electrochemical devices, our laboratory is full of automated eqiupment, which maximizes the acquisition of fine experimental data. We, in fact, discovered a new proton-conducting materials by just one synthesis based on machine learning prediction [selected as the cover art of ACS Energy Lett. 6(2021) and press released]. Kyushu Unviersity also featured our research and made a Youtube video. Using the machine learning modeling, we are getting more successful in developing many new materials and devices in a very short period, which was impossible using a conventional trial-and-error approach.

We made both the rich training dataset and trained model reported in ACS Energy Lett. publicly available via our Github repository, hoping that people in broader energy areas and society will take advantages from our results and further accelerate the development of their energy materials and electrochemical devices. We are very happy to contribute to energy areas and society in this way.

Being so powerful, the usage of machine learning will soon be a new standard for materials discovery and device development, which will transform the ways we approach and understand energy materials. If you are interested in joining our group to learn this exciting and futuristic methods, impact on broader energy areas, and eventually change the world, contact Prof. Yamazaki in advance. Our laboratory benches are limitted. You will be the one who discovers next new materials! We are very excited about our on-going projects and cannot wait to make the results public!

In the virtual laboratory tours on Youtube (Activate subtitle and auto translation to your language in your Youtube setting since Prof. Yamazaki explains in Japanese here) and on our website, you are welcomed to see our secrets in transforming the methods of discovering new energy materials and developing advanced electrochemical devices to a new level.

The target materials include novel oxides for solar-driven thermochemical fuel production, photochemical water splitting, e-fuels (a sustainable alternative fuel produced with electricity from renewable sources, water and CO2), and proton ceramic fuel cells & electrolyzers.

News

2021. 10.21
Professor Yamazaki is featured on the top page of Kyushu Unviersity homepage.
2021.8.13
Our research on materials discovery using machine learning was selected and published as the cover art of the August issue of ACS Energy Letters!
2021.8.4
We discovered a new proton-conducting materials by just one synthesis based on machine learning prediction! Constructing a reliable experimental database and capturing the physicochemical fundamentals of hydration were necessary to attain high prediction accuracy that enabled the discovery of the new materials. It is published in ACS Energy Letters.
2021. 2.1
Congraturations on Hoshino's success in PhD defence!
2021. 2.1
Dr. Nai Shi started as a post-doc researcher. Welcome to our group!
2021. 1.22~29
Tsujikawa(D1) gave an online poster presentation at Energy Week.
2021. 1.15
A paper on non-linear chemical expansion upon hydration has been accepted to Chemistry Letters. The first author is Mr. Hoshino(D3).
2021. 1.13
A paper on enhanced catalytic activity of Cl-poisoned Pt/CeO2 catalysts by the usage of hydroxyl groups on the surface has been accepted to Chemistry Letters. The first author is Mr. Uchiyama(D3).
2020. 10.1
Tsujikawa(D1) received the Encouragement Award in the Doctoral Program Support Program by Q-PIT.
2020. 8.20
We had a joint press release with Japan Fine Ceramics Center, and Miyazaki University on the research that discovered a new descriptor enabling the prediction of proton conductivity.
2020.7.31
We discovered a descriptor that can predict proton conductivity in doped barium zirconates, published in Chemistry of Materials!

2020. 7.30
Paper accepted by Advanced Energy Materials is now open access! Anyone can download it freely.
2020.5.28
We developed fast and stable proton-conducting electrolyte that are suitale for intermediate-temperature operations of fuel cells, published in Adv. Energy Mater, open access!

2019.10.26
Photocatalyst research was accepted in JPCc.
2019.10.20
Prof.Yamazaki gave an invited talk at the 11th Petite Workshop (Sommaroy, Norway).
2019.10.12
Photocatalyst research was accepted in J. Mater. Chemistry A.
2019.10.2
Uchiyama(D2) and Hoshino(D2) received the Incentive award in the Q-PIT AY2019 Support Program for Young Researchers and Doctoral Sutudents.
2019.9.11
Prof.Yamazaki gave an invited talk in the The 20th KIM-JIM Symposium(Okayama).
2019.9.3-6
Prof. Yamazaki gave an invited talk in the O-HyLi:Ionics of Oxygen,Hydrogen and Lithium at Northwestern University,USA.
2019.7.22
Prof. Yamazaki gave a presentation in the Kyushu University(KU)-Tsinghua University(TU) Joint Workshop on Hydrogen/Decarbonization Economy, Fukuoka.
2019.7.16
Prof. Yamazaki gave a presentation in Condensed Matter Theory and Statical Physics at Kyushu University.
2019.6.26
Prof. Yamazaki gave an invited talk in the 15th International Conference on Diffusion in Solids and Liquids-DSL2019, Athens, Greece.
2019.6.17
Prof. Yamazaki gave an invited talk in the 22nd Inernational Conference on Solid State Ionics, Pyeonfchang, Korea.
2019.4.17
Joint reserch with Dr. Kurebayashi(UCL) and Prof.Kimura(Kyushu University) was accepted in Journal of Magnetism and Magnetic Materials.
2018.9.19
Prof. Yamazaki recieved $3M CREST grant from Japan Science and Technology (JST) agency.
2018.9.10~13
We organized the 5th Solid-state Chemistry and Ionics (SCI) workshop in Fukuoka.
2018.6.19
Our photocatalyst paper was accepted in ACS Catalysis (IF: 11.384). It is a result of interdisciplinary collaborations between Kyushu Univ., Tokyo Institute of Technology, Toyota Institute of Technology, and NIMS.
2018.6.15
Prof. Grey, Univ. Cambridge, UK, give an invited talk in the 4th Solid-state Chemistry & Ionics (SCI) international workshop.
2017.12.8
Prof. Yamazaki gave an invited talk in the Institute of Materials Research at Tohoku University, Sendai, Japan.
2017.12.7
Prof. Yamazaki gave an invited talk in the 43rd Solid-State Ionics Discussion, Tendo, Japan.
2017.11.7
Prof. Yamazaki organizes the 3rd Solid-state Chemistry & Ionics (SCI) workshop featuring Prof. Yoo at DGIST, Korea.
2017.9.25
Joint research between California Institute of Technology, Northwestern University, MIT (USA), ETH (Switzerland) was accepted in MRS Communications.
2017.7.27
Prof. Yamazaki was invited to give a talk in the Department of Materials Science and Engineering at Stanford University, USA.
2017.6.18-23
Prof. Yamazaki is invited to give a talk in the 21st International Conference on Solid State Ionics, Padua, Italy.
2017.6.16
Prof. Yamazaki is invited to give a talk in FOXCET Workshop: Proton Ceramic Reactors - Fundamentals and Applications, Oslo.
2017.6.15
Prof. Yamazaki serves as an opponent of Ph.D defence in the Department of Chemistry, University of Oslo.
2016.12.20
Prof. Yamazaki organized the 2nd Solid-state Chemistry & Ionics (SCI) workshop featuring Prof. Norby at the University of Oslo, Norway.
2016.12.16
Dr. Kreuer, Max Planck Institute, Germany, gave a talk at the Inamori Frontier Research Center.
2016.11.16
Prof. Yamazaki organized the 1st Solid-state Chemistry & Ionics (SCI) workshop featuring Prof. Haile at Northwestern University, USA.
2016.10.16
Prof. Martin, RWTH Archen University, Germany, gave a talk in the 25th Inamori Frontier Research Seminar.
2016.10.12-14
Prof. Yamazaki is invited to give a talk in The 6th Solid-state electrochemistry workshop 2016, Tokyo, Japan.
2016.9.18-22
Prof. Yamazaki is going to give a talk in The 18th Solid State Protonic Conductors, Oslo, Norway.
2016.9.4-8
Prof. Yamazaki will be a chair of Engineering Conferences International on Nonstoichiometric Compounds VI, Santa Fe, USA.
2016.9.2
Prof. Yamazaki is invited to give a talk at the Colorado School of Mines, Golden, USA.
2016.5.26
Prof. Yamazaki won The Chemical Conversion of Light Energy Prize 2016 from Japan Science and Technology Agency.
2015.6.14
Prof. Yamazaki is going to give a talk in the 20th International Conference on Solid State Ionics, Colorado, USA.
2014.11.17
Prof. Yamazaki gave a presentation in the Solid State Ionics Discussion, Ookayama, Japan.
2014.10.03
Prof. Yamazaki was invited to give a talk at Kyoto University, Japan.
2014.09.15
Prof. Yamazaki gave an invited talk in the 17th International Conference on Solid-State Protonic Conductors in Seoul, Korea.
2014.09.12
Prof. Yamazaki gave an invited talk at KAIST in Degeon, Korea.
2014.09.09
Prof. Yamazaki gave a talk in the 11th Inamori Frontier Research Lecture in Fukuoka, Japan.
2014.09.08
Dr. Ogata, University of Cambridge, UK, gave a talk in the 16th Inamori Frontier Research Seminar.
2014.08.31
Prof. Yamazaki was invited to give a talk in the 10th Solid State Ionics Seminar in Tazawako, Japan.
2014.08.22
Prof. Yamazaki was invited to give a kenote in the International Conference of Diffusion in Materials, DIMAT 2014, Munster, Germany.
2014.08.15
Prof. Yamazaki was invited to give a talk at Leibniz Institute for Surface Modification, Leipzig, Germany.
2014.08.01
Dr. Yoshihiro Yamazaki joined Inamori Frontier Research Center at Kyushu University as a full professor.
Previous events
Research Highlights &Links

Click images for more info.!
Kyushu University features Prof. Yamazaki on their Homapage & Youtube
Virtual lab tour@Youtube
Prof. Yamazaki virtually takes you to laboratory tour in person. You can take a look around at 360 degrees on the Youtube as you do in actual tour. Activate subtitle and auto translation to your language in your Youtube setting since he explains in Japanese here. Translation from Japanese to English was not that bad!
Recruiting Ph.D. students!

We are recruiting Ph.D. graduate students and post-docs in the Department of Materials. There might be finantial support via Japan Society for the Promotion of Science (JSPS) and other organizations. Contact Prof. Yamazaki in advance if you are interested in.

Contact

Prof. Yoshihiro Yamazaki
- Kyushu University Platform of Inter-/Transdisciplinary Energy Research (Q-PIT)
- Graduate School of Engineering
- Department of Materials

744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
e-mail: yamazaki.yoshihiro.105@m.kyushu-u.ac.jp
TEL :+81-92-802-6966

Awards

Matsubara (M2) Excellent poster award @ Japan Institute of Metals, September 2021

Matsubara (M2) Excellent presentation award @ 2021FY Japan Institute of Metals, Kyushu Branch, June 2021

Kitabayashi (M2) Excellent student award@ Kyushu University, March, 2021

Tsujikawa(D1), Incentive award@Q-PIT AY2020 Support Program for Doctoral Students, Oct. 2020.

Tsujikawa(M2@Miyazaki Univ.) Poster award@The 13th Pacific Rim Conference of Ceramic Societies, Oct. 2019.

Uchiyama(D2),Hoshino (D2) Incentive award@Q-PIT AY2019 Support Program for Doctoral Students, Oct. 2019.

Uchiyama(D2)Excellent presentation award@The 4th Engineering Resarch Planning Seminar, Sep. 2019.

Uchiyama(D2) Excellent research presentation award (6/80)@56th Electrochemical Society, Kyushu branch, Jul. 2019.

Hoshino(D1) Gold prize@Q-PIT AY2018 Support Program for Young Researchers and Doctoral Students, Jan. 2019.

Tani(M2) Excellent research presentation award@56th Electrochemical Society, Kyushu branch, June. 2018.

Hoshino(D1)English oral presentation excellent award@AY2018 Japan Institute of Metal, Kyushu Branch, June. 2018.

Ishibashi(M2)Oral presentation excellent award@AY2018 Japan Institute of Metal, Kyushu Branch , June. 2018.

Ishibashi (M1) Excellent presentation award@Kyushu Univ. Energy week, Jan. 2018.

Tani (M1, left) Best poster award@13th Solid-State Ionics Seminar, Sep. 2017.

Hoshino (M2) Excellent research presentation award (7/103)@54th Electrochemical Society, Kyushu branch, Jul. 2017.

Kamal (M1, left) Ion Scholarship@Ion 1% Club, Jul. 2017.

Hoshino (M2, right) Scholarship to present in international conference @Murata Foundation, Jun. 2017.

Hoshino (M1), Best poster award@Japan Institute of Metals and Materials, Mar. 2017.


Hoshino (M1, right) Excellent presentation award@Kyushu Univ. Energy week, Jan. 2017.


Kamal (M1, right) Excellent research presentation award@Electrochemical Society, Kyushu branch, June 2016.

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