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Shingo Ohta

Toyota

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Publication

Featured researches published by Shingo Ohta.

Frontiers in Energy Research | 2016

Grain Boundary Analysis of the Garnet-Like Oxides Li7+X−YLa3−XAXZr2−YNbYO12 (A = Sr or Ca)

Shingo Ohta; Yuki Kihira; Takahiko Asaoka

Garnet-like oxides having the formula Li7+X-YLa3-XAXZr2-YNbYO12 (A = Sr or Ca) were synthesized using a solid-state reaction and their bulk and grain boundary resistivities were assessed by AC impedance measurements. A difference in grain boundary resistivity was identified between the Sr and Ca materials and so the grain boundaries were examined using electron probe microanalysis (EPMA). The difference in the grain boundary resistivities was attributed to the core-shell structure of the Sr-substituted samples. In contrast, the Ca-substituted materials exhibited accumulations of impurities at the grain boundaries.

Journal of Power Sources | 2011

High lithium ionic conductivity in the garnet-type oxide Li7−X La3(Zr2−X, NbX)O12 (X = 0–2)

Shingo Ohta; Tetsuro Kobayashi; Takahiko Asaoka

Journal of Power Sources | 2012

Electrochemical performance of an all-solid-state lithium ion battery with garnet-type oxide electrolyte

Shingo Ohta; Tetsuro Kobayashi; Juntaro Seki; Takahiko Asaoka

Journal of Power Sources | 2013

All-solid-state lithium ion battery using garnet-type oxide and Li3BO3 solid electrolytes fabricated by screen-printing

Shingo Ohta; Shogo Komagata; Juntaro Seki; Tohru Saeki; Shinya Morishita; Takahiko Asaoka

Journal of Power Sources | 2014

Co-sinterable lithium garnet-type oxide electrolyte with cathode for all-solid-state lithium ion battery

Shingo Ohta; Juntaro Seki; Yusuke Yagi; Yuki Kihira; Takao Tani; Takahiko Asaoka

Archive | 2010

GARNET-TYPE LITHIUM ION-CONDUCTING OXIDE AND ALL-SOLID-STATE LITHIUM ION SECONDARY BATTERY CONTAINING THE SAME

Shingo Ohta; Tetsuro Kobayashi; Takahiko Asaoka; Mitsuru Asai

ECS Electrochemistry Letters | 2013

Effect of Simultaneous Substitution of Alkali Earth Metals and Nb in Li7La3Zr2O12 on Lithium-Ion Conductivity

Yuki Kihira; Shingo Ohta; Haruo Imagawa; Takahiko Asaoka

Journal of Alloys and Compounds | 2012

Crystal structure determination of solar cell materials: Cu2ZnSnS4 thin films using X-ray anomalous dispersion

Hiroshi Nozaki; Tatsuo Fukano; Shingo Ohta; Yoshiki Seno; Hironori Katagiri; Kazuo Jimbo

Solid State Ionics | 2014

Garnet-type Li6.75La3Zr1.75Nb0.25O12 synthesized by coprecipitation method and its lithium ion conductivity

Haruo Imagawa; Shingo Ohta; Yuki Kihira; Takahiko Asaoka

Solid State Ionics | 2014

Li diffusive behavior of garnet-type oxides studied by muon-spin relaxation and QENS

Hiroshi Nozaki; Masashi Harada; Shingo Ohta; Isao Watanabe; Yasuhiro Miyake; Y. Ikedo; Niina Jalarvo; Eugene Mamontov; Jun Sugiyama

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Takahiko Asaoka

Toyota

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Yuki Kihira

Toyota

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Haruo Imagawa

Toyota

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Juntaro Seki

Toyota

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Tetsuro Kobayashi

University of Yamanashi

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Hiroshi Nozaki

Toyota

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Mitsuru Asai

Toyota

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Isao Watanabe

Tohoku University

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Jun Sugiyama

Toyota

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Kazuyuki Nakanishi

Toyota

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