研究者詳細 - 寺西　貴志

論文 - 寺西　貴志

分割表示 117 件中 61 - 80 件目／全件表示 >>

21aAF-3 BaTiO_3のバンド構造におけるイオン欠損効果

押目典宏, 狩野旬, 池田直, 寺西貴志, 大崎浩司, 藤井達生, 上田剛慈, 大久保智子

日本物理学会講演概要集 71 2691 - 2691 2016年

Stabilisation dopant-dependent facilitation in ionic conductivity on millimeter-wave irradiation heating of zirconia-based ceramics 査読

Akira Kishimoto, Hideki Hasunuma, Takashi Teranishi, Hidetaka Hayashi

JOURNAL OF ALLOYS AND COMPOUNDS 648 740 - 744 2015年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE SA

Ionic conductivity was measured on scandia-, calcia-, and gadolinia-stabilised zirconia ceramics under quasi-millimeter-wave (MMW) irradiation heating and conventional heating. Conductivity enhancement was evaluated for these ceramics and compared with our previous report on yttria- and ytterbia-stabilised zirconia ceramics (YSZ and YbSZ, respectively). The ionic conduction for the various cation-substituted zirconia ceramics was enhanced under MMW irradiation heating. In the case of scandia-stabilisation, the optimal composition demonstrating maximum ionic conductivity was 12-mol% zirconia (ScSZ) under MMW irradiation heating, which was larger than under conventional heating. Such an optimal composition shift was similar to results for YSZ ceramics. These results are discussed in terms of the activation energies for vacancy-ion dissociation and ion transfer. (C) 2015 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.jallcom.2015.07.057

Web of Science

researchmap

High-Rate Capabilities of Ferroelectric BaTiO3?LiCoO2 Composites with Optimized BaTiO3 Loading for Li-Ion Batteries 査読

T. Teranishi, Y. Yoshikawa, R. Sakuma, H. Okamura, H. Hashimoto, H. Hayashi, T. Fujii, A. Kishimoto, and Y. Takeda

ECS Electrochemistry Letters 4 A137 2015年10月

In situ impedance analysis on BaTiO3-LiCoO2 composite cathodes for lithium ion batteries 査読

Takashi Teranishi, Yumi Yoshikawa, Ryo Sakuma, Hirokazu Okamura, Hidetaka Hayashi, Akira Kishimoto, Yasuo Takeda

JAPANESE JOURNAL OF APPLIED PHYSICS 54 ( 10 ) 2015年10月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：IOP PUBLISHING LTD

In situ electrochemical impedance spectroscopy (EIS) was undertaken to investigate the contribution of a ferroelectric artificial solid electrolyte interface (SEI) to the enhancement of the rate capability of lithium ion batteries. Resistance elements, consisting of the cell reactions, the resistance of the electrolyte, R-sol, that of the Li metal anode reaction, R-Li, and the charge transfer resistance, R-ct, were measured. A small ferroelectric BaTiO3 (BT) load, similar to 1 mol %, notably reduced R-ct and R-sol compared with bare LiCoO2 (LC), indicating that loaded ferroelectric BT SEIs effectively promote Li inter/deintercalation into and from the active material, LC, and restrict cobalt ion dissolution into the electrolyte liquid. Lower R-ct and R-sol resulted in a significantly higher capacity retention ratio at a 10C rate compared with the initial cycle for small BT load, similar to 1 mol %. The capacity retention dropped rapidly, accompanied by a slight increase in R-ct for larger BT loads, 5 and 15 mol %, which may be attributed to the thicker BT layer and the existence of the impurity phase, BaCO3. These results imply that the ferroelectric SEI affected the kinetics of mobile Li ions at the cathode-electrolyte interface, significantly enhancing the rate capability. (C) 2015 The Japan Society of Applied Physics

DOI： 10.7567/JJAP.54.10NB02

Web of Science

researchmap

In situ impedance analysis on BaTiO3?LiCoO2 composite cathodes for lithium ion batteries 査読

T. Teranishi, Y. Yoshikawa, R. Sakuma, H. Okamura, H. Hayashi, A. Kishimoto, and Y. Takeda

Japanese Journal of Applied Physics 54 10NB02 2015年9月

Influence of PMSA-based polymer on the settling velocity of CNT in Aqueous Media 査読

Naoyuki Nishimura,Shin Ichi Takeda,Takashi Teranishi*,Hidetaka Hayashi*,Naoto Saito,Akira Kishimoto*

Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, journal of the japan society of powder and powder metallurgy, Journal of the Japan Society of Powder and Powder Metallurgy 63 ( 10 ) 861 - 865 2015年9月

Effect of 24 GHz microwave heating on creep deformation of yttria partially stabilised zirconia ceramics with titania and tin oxide additives 査読

Akira Kishimoto, Kyohei Yamashita, Takashi Teranishi, Hidetaka Hayashi, Saburo Sano

CERAMICS INTERNATIONAL 41 ( 4 ) 5785 - 5789 2015年5月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCI LTD

The effect of quasi-millimetre-wave (24 GHz microwave) heating on creep deformation was investigated on partially-stabilised zirconia through tensile testing at temperatures from 1100 to 1350 degrees C over stresses from 5 to 10 MPa. The specimens were fabricated by sintering the 3 mol% of yttria stabilised ZrO2 (3YSZ) powder dispersed with SiO2, SiO2/SnO2 or SiO2/TiO2 at 1600 degrees C. In tensile test using the quasi-millimetre wave heating, strain rates of SiO2 dispersed 3YSZ were similar to that with a conventional furnace heating. The 3YSZ sample containing the TiO2 addition exhibited a different strain rate when heated by millimeter-wave irradiation as against conventional furnace heating, it is proposed that this difference can be explained due to TiO2 having a high-dielectric constant resulting in a non-thermal effect when subjected to quasi-millimeter wavelength radiation. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

DOI： 10.1016/j.ceramint.2015.01.006

Web of Science

researchmap

Effect of 24GHz microwave heating on creep deformation of yttria partially stabilised zirconia ceramics with titania and tin oxide additives 査読

A. Kishimoto, K. Yamashita, T. Teranishi, H. Hayashi and S. Sano

Ceramics International 41 5785 2015年4月

Stabilisation dopant-dependent facilitation in ionic conductivity on millimetre-wave irradiation heating of zirconia-based ceramics 査読

A. Kishimoto, H. Hasunuma, T. Teranishi and H. Hayashi

Journal of Alloys and Compounds 648 740 2015年4月

Effect of Mg loading on the high-frequency tunability of Ba0.8Sr0.2TiO3 ceramics 査読

T. Teranishi, T. Sogabe, H. Hayashi, A. Kishimoto, K. Iokibe, and Y. Toyota,

Japanese Journal of Applied Physics 54 011502 2015年4月

High-Rate Capabilities of Ferroelectric BaTiO3-LiCoO2 Composites with Optimized BaTiO3 Loading for Li-Ion Batteries 査読

Takashi Teranishi, Yumi Yoshikawa, Ryo Sakuma, Hirokazu Okamura, Hideki Hashimoto, Hidetaka Hayashi, Tatsuo Fujii, Akira Kishimoto, Yasuo Takeda

ECS ELECTROCHEMISTRY LETTERS 4 ( 12 ) A137 - A140 2015年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELECTROCHEMICAL SOC INC

Ferroelectric barium titanate, BaTiO3 (BT) was coated on lithium cobaltate, LiCoO2 (LC), as an artificial solid electrolyte interface (SEI), via the simple sol-gel route. The high charge-discharge rate capabilities of the composite cathodes were evaluated up to 10C. The LC loaded with 1 mol% of BT had a measured capacity of 146 mAh/g, which was the highest value measured at 10C. This capacity was 78% of its initial value, and was 238% of the capacity of bare LC over the same number of cycles. (C) 2015 The Electrochemical Society. All rights reserved.

DOI： 10.1149/2.0041512eel

Web of Science

researchmap

22pCH-13 金属-強誘電体接合系での触媒作用

狩野旬, 池田直, 押目典宏, 藤井達生, 橋本英樹, 寺西貴志, 大久保智子, 上田剛慈, 吉田右, 秋山雄介

日本物理学会講演概要集 70 2743 - 2743 2015年

21pCJ-7 Ba_<0.8>Sr_<0.2>TiO_3のMgドープ効果

押目典宏, 狩野旬, 大崎浩司, 寺西貴志, 吉田右, 池田直, 藤井達生, 大久保智子, 上田剛慈

日本物理学会講演概要集 70 2704 - 2704 2015年

High-rate performance of ferroelectric BaTiO3-coated LiCoO2 for Li-ion batteries 査読

T. Teranishi, Y. Yoshikawa, R. Sakuma, H. Hashimoto, H. Hayashi, A. Kishimoto, and T. Fujii

Applied Physics Letters 105 143904 2014年10月

Dependence of the conductivity of polycrystalline Li0.33BaxLa0.56-2/3xTiO3 on Ba loading 査読

Takashi Teranishi, Akane Kouchi, Hidetaka Hayashi, Akira Kishimoto

SOLID STATE IONICS 263 33 - 38 2014年10月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE BV

The dependence of lithium ion conductivity on barium loading was investigated for Li0.33BaxLa0.56-2/3xTiO3 (LBLT, 0 <= x <= 0.1) ceramics. The highest bulk conductivity, sigma(dc), of 1.24 x 10(-3) S cm(-1) obtained for 0.25 mol.% Ba loading was slightly improved compared to that of non-doped Li0.33La0.56TiO3 (1.18 x 10(-3) S cm(-1)). The intensities of the XRD patterns in the independent cubic and tetragonal reflections, i.e., I-c(100) and I-t(101), were analyzed; a larger I-c(100)/I-t(101) ratio corresponded to a larger sigma(dc). A possible reason for the only slight enhancement of the sigma(dc) by a small loading of Ba is an increased volume fraction of the more highly conductive LBLT cubic phase. (C) 2014 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.ssi.2014.05.001

Web of Science

researchmap

High-rate performance of ferroelectric BaTiO3-coated LiCoO2 for Li-ion batteries 査読

Takashi Teranishi, Yumi Yoshikawa, Ryo Sakuma, Hideki Hashimoto, Hidetaka Hayashi, Akira Kishimoto, Tatsuo Fujii

APPLIED PHYSICS LETTERS 105 ( 14 ) 2014年10月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：AMER INST PHYSICS

The high charge-discharge rate characteristics of composite cathodes consisting of ferroelectric BaTiO3 (BT)-coated LiCoO2 (LC), synthesized via a simple sol-gel route, were evaluated, and the rate showed stepwise increases to as high as 5C. The LC-BT composite cathode annealed at 600 degrees C, LC-BT-600, notably retained high capacities, i.e., 122 mAh/g at 30 cycles, 5C and 99 mAh/g at 60 cycles, 5C. These capacities corresponded to 83% and 67% of the initial values and were as high as 158% and 245% of the capacities of bare LC over the same cycles, respectively. The ferroelectricity of the coated BT contributed to the improvement in high-rate performance. (c) 2014 AIP Publishing LLC.

DOI： 10.1063/1.4898006

Web of Science

researchmap

Dependence of the conductivity of polycrystalline Li0.33BaxLa0.56?2/3xTiO3 on Ba loading 査読

T. Teranishi, A. Kouchi, H. Hayashi, and A. Kishimoto

Solid State Ionics 263 33 2014年5月

The isothermal conductivity improvement in zirconia-based ceramics under 24 GHz microwave heating 査読

A. Kishimoto, K. Ayano, T. Teranishi, and H. Hayashi

The isothermal conductivity improvement in zirconia-based ceramics under 24 GHz microwave heating. 143 486 - 489 2014年4月

Relationship Between Phonon Parameters and Oxygen Ion Conductivity for Al?Yb Co-doped Zirconia 査読

T. Teranishi, N. Matsubara, H. Hayashi, and A. Kishimoto

Key Engineering Materials 582 107 - 110 2014年4月

The isothermal conductivity improvement in zirconia-based ceramics under 24 GHz microwave heating 査読

Akira Kishimoto, Keiko Ayano, Takashi Teranishi, Hidetaka Hayashi

MATERIALS CHEMISTRY AND PHYSICS 143 ( 2 ) 486 - 489 2014年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE SA

Under 24-GHz millimetre-wave irradiation heating ionic conductivity of zirconia base ceramics was up to 20 times higher than that of a conventionally-heated sample at the same temperature of 400 degrees C. The degree of enhancement could be altered by changing the stabilising atom from Y to Yb. Enhancement of ionic conduction was prominent in the setup condition of larger self-heating ratio and larger MMW absorbing materials. The isothermal improvement of ionic conductivity under MMW irradiation would be ascribed to the non-thermal effect. (C) 2013 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.matchemphys.2013.10.002

Web of Science

researchmap

　前のページ - 次のページ　

<寺西 貴志>

論文 - 寺西 貴志

<寺西　貴志>

論文 - 寺西　貴志