H
Hiroki Moriwake
Researcher at National Institute for Materials Science
Publications - 137
Citations - 2655
Hiroki Moriwake is an academic researcher from National Institute for Materials Science. The author has contributed to research in topics: Ferroelectricity & Thin film. The author has an hindex of 25, co-authored 133 publications receiving 2078 citations. Previous affiliations of Hiroki Moriwake include Kyoto University & Panasonic.
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Journal ArticleDOI
Accelerated Materials Design of Lithium Superionic Conductors Based on First-Principles Calculations and Machine Learning Algorithms
Koji Fujimura,Atsuto Seko,Yukinori Koyama,Akihide Kuwabara,Ippei Kishida,Kazuki Shitara,Craig A. J. Fisher,Hiroki Moriwake,Isao Tanaka +8 more
TL;DR: In this article, a machine learning technique is used to combine theoretical and experimental datasets to predict the conductivity of each composition at 373 K. The insights obtained show that an iterative combination of first-principle calculations and focused experiments can greatly accelerate the materials design process by enabling a wide compositional and structural phase space to be examined effi ciently.
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Why is sodium-intercalated graphite unstable?
TL;DR: In this article, van der Waals correction terms are introduced to better reproduce the layered graphite structure, and calculated formation energies of GICs AMC6, where AM = Li, Na, K, Rb, and Cs, are found to become less negative (less stable) as ion size decreases from Cs to Na as a result of weakening ionic bonding, until the formation energy of NaC6 becomes positive.
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First‐Principles Calculations of Lithium‐Ion Migration at a Coherent Grain Boundary in a Cathode Material, LiCoO2
Hiroki Moriwake,Akihide Kuwabara,Craig A. J. Fisher,Rong Huang,Taro Hitosugi,Yumi H. Ikuhara,Hideki Oki,Yuichi Ikuhara,Yuichi Ikuhara +8 more
TL;DR: This study suggests that internal interfaces in LiCoO(2) strongly affect the battery voltage, battery capacity, and power density of this material, which is of particular concern if it is used in all-solid-state Li-ion batteries.
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Oxygen-vacancy ordering at surfaces of lithium manganese(III,IV) oxide spinel nanoparticles.
Rong Huang,Yumi H. Ikuhara,Teruyasu Mizoguchi,Scott D. Findlay,Akihide Kuwabara,Craig A. J. Fisher,Hiroki Moriwake,Hideki Oki,Tsukasa Hirayama,Yuichi Ikuhara +9 more
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Lithium Atom and A-Site Vacancy Distributions in Lanthanum Lithium Titanate
Xiang Gao,Craig A. J. Fisher,Teiichi Kimura,Yumi H. Ikuhara,Hiroki Moriwake,Akihide Kuwabara,Hideki Oki,Hideki Oki,Takeshi Tojigamori,Rong Huang,Yuichi Ikuhara +10 more
TL;DR: In this article, the authors used subangstrom resolution scanning transmission electron microscopy (STEM) imaging methods and spatially resolved electron energy loss spectroscopy (EELS) analysis to examine the local atomic structure of LLTO.