研究者詳細 - 寺西　貴志

論文 - 寺西　貴志

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Millimeter-wave irradiation heating for operation of doped CeO 2 electrolyte-supported single solid oxide fuel cell 査読

Salmie Suhana Binti Che Abdullah, Takashi Teranishi, Hidetaka Hayashi, Akira Kishimoto

Journal of Power Sources 374 92 - 96 2018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 BV

High operation temperature of solid oxide fuel cell (SOFC) results in high cell and operation cost, time consuming and fast cell degradation. Developing high performance SOFC that operates at lower temperature is required. Here we demonstrate 24 GHz microwave as a rapid heating source to replace conventional heating method for SOFC operation using 20 mol% Sm doped CeO2 electrolyte-supported single cell. The tested cell shows improvement of 62% in maximum power density at 630 °C under microwave heating. This improvement governs by bulk conductivity of the electrolyte. Investigation of ionic transference number reveals that the value is unchanged under microwave irradiation, confirming the charge carrier is dominated by oxygen ion species. This work shows a potential new concept of high performance as well as cost and energy effective SOFC.

DOI： 10.1016/j.jpowsour.2017.11.036

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LaGaO<sub>3</sub>系セラミックスにおける酸化物イオン伝導に及ぼすミリ波照射加熱の影響査読

工藤侑芽、藤井祐里、蓮沼英樹、寺西貴志、林秀考、岸本昭

粉体および粉末冶金 65 ( 1 ) 21 - 25 2018年

Evaluation of Li-ion battery using a Terahertz Chemical Microscope

Yuki Akiwa, Kentarou Fujiwara, Yumi Yoshikawa, Takashi Teranishi, Kenji Sakai, Toshihiko Kiwa, Keiji Tsukada

2018 43RD INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES (IRMMW-THZ) 2018年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：IEEE

We measured the terahertz wave intensity of the active material surface using TCM as a method to evaluate lithium ion batteries. We made a battery with a sensing plate attached to measure with TCM. As a result, changes in the terahertz wave intensity due to charging and discharging of the battery could be measured. This result indicates that the extraction and insertion of lithium in the active material can be measured by TCM in the future.

Web of Science

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Relationship between thermal environment and conductivity enhancement under millimeter-wave irradiation heating of zirconia ceramics 査読

KISHIMOTO Akira, SHIMOYAMA Koyo, TERANISHI Takashi, HAYASHI Hidetaka

Journal of the Ceramic Society of Japan 125 ( 10 ) 717 - 720 2017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：公益社団法人日本セラミックス協会

Improving the conductivity of 8 mol % yttria-stabilized zirconia (8YSZ) electrolyte has enabled a lowering of the operating temperature of solid oxide fuel cells. We previously reported that millimeter-wave irradiation heating increases the ionic conductivity of ceramics. The ionic conductivity of 8YSZ under millimeter-wave irradiation heating had been up to 20 times higher than that with conventional heating. In the present study, we investigated the optimal thermal environment for millimeter-wave irradiation heating. We also investigated the thermal profile of samples under millimeter-wave irradiation heating to elucidate the rate of the non-thermal effect.

DOI： 10.2109/jcersj2.17056

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Loading effect of a barium titanate artificial interface on high voltage capabilities at high charge and discharge rates 査読

Yoshikawa Yumi, Teranishi Takashi, Hayashi Hidetaka, Kishimoto Akira

Jpn. J. Appl. Phys. 56 ( 10 ) 10PC01 - 4959 2017年9月

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Institute of Physics

Cyclic characteristics of BaTiO<inf>3</inf>(BT)-decorated LiCoO<inf>2</inf>(LC), for use as an artificial solid electrolyte interface (SEI) were evaluated at high voltages. Within the standard voltage window (i.e., 3.3–4.2 V), the BT-decorated LC exhibited greater capacities for up to 80 cycles compared with both the Al<inf>2</inf>O<inf>3</inf>(paraelectric)-decorated and bare LC SEIs. The discharge capacity retention after 80 cycles (compared with the initial value) was 86.0% for the BT–LC cathode. This is a significant improvement over both the bare LC that showed 19.9% retention and the Al<inf>2</inf>O<inf>3</inf>–LC that displayed 71.5% retention. Thereafter, the cyclic stabilities of the BT–LC and bare LC were compared within potential windows at cutoff voltages as high as 4.9 V. In this region, BT decoration yielded marked improvements in capacity retention after 50 cycles, up to a potential of 4.7 V. The post-situ XRD analysis of the cathode sheets showed that BT decoration effectively stabilized the hexagonal crystal structure of the LC, H1, resulting in the said cyclic stability increase. These observations demonstrate that the use of BT in SEI allows a significant increase in working voltage while maintaining the chemical stability of the underlying LC matrix, a key advancement in the perpetual pursuit of ever higher cell energy densities.

DOI： 10.7567/JJAP.56.10PC01

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Broadband spectroscopy of dielectrics and oxygen-ion conductors 査読

Takashi Teranishi *

Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan, Yogyo Kyokai Shi/Journal of the Ceramic Society of Japan, Journal of the Ceramic Society of Japan 125 ( 7 ) 547 - 551 2017年7月

Electrodeposition of Ni-Al（OH）₃ Composite Films from NO₃^－ Containing Non-Suspended Bath

Toru ASANO, Hidetaka HAYASHI, Takashi TERANISHI, Akira KISHIMOTO, Kazuya ISHII

Journal of The Surface Finishing Society of Japan 68 ( 7 ) 401 - 404 2017年7月

Polarization behavior of sol-gel-derived relaxor Ba(Zr, Ti)O3 films 査読

Takashi Teranishi *,Shin Kajiyama,Hidetaka Hayashi*,Akira Kishimoto*

Journal of the American Ceramic Society 100 ( 4 ) 1542 - 1550 2017年4月

Effect of the (Ba + Sr)/Ti ratio on the microwave-tunable properties of Ba0.6Sr0.4TiO3 ceramics 査読

Takashi Teranishi *,Riku Kanemoto,Hidetaka Hayashi*,Akira Kishimoto*

Journal of the American Ceramic Society 100 ( 3 ) 1037 - 1043 2017年3月

Enhanced electrical conductivity of doped CeO2 under millimeter-wave irradiation heating 査読

Salmie Suhana Binti Che Abdullah,Takashi Teranishi *,Hidetaka Hayashi*,Akira Kishimoto*

Materials and Design, International Journal of Materials in Engineering Applications 115 231 - 237 2017年2月

固相発泡により扁平気孔を導入した高温圧力センサーの特性向上 (特集粉末冶金プロセスによる製造技術とその材料評価の新展開) 査読

高室佑基, 寺西貴志, 林秀考, 岸本昭

粉体および粉末冶金 = Journal of the Japan Society of Powder and Powder Metallurgy : 紛体粉末冶金協会誌 64 ( 2 ) 68 - 72 2017年2月

Gastight, closed pore inclusive porous ceramics through a superplastically foaming method 査読

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

Ceram. Trans 2016年10月

Quantitative study of band structure in BaTiO3 particles with vacant ionic sites 査読

Norihiro Oshime,Jun Kano*,Naoshi Ikeda*,Takashi Teranishi*,Tatsuo Fujii*,Takeji Ueda,Tomoko Ohkubo

Journal of Applied Physics 120 ( 15 ) 2016年10月

High rate capability of a BaTiO3-decorated LiCoO2 cathode prepared via metal organic decomposition 査読

Takashi Teranishi*,Naoto Katsuji,Yumi Yoshikawa,Mika Yoneda,Hidetaka Hayashi*,Akira Kishimoto*,Koji Yoda,Hidefumi Motobayashi,Yuzo Tasaki

Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes, Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Japanese Journal of Applied Physics, Japanese Journal of Applied Physics, Part 2: Letters 55 ( 10 ) 2016年10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 63 ( 10 ) 861 - 865 2016年9月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：Journal of the Japan Society of Powder and Powder Metallurgy

The preparation of a stable suspension dispersing carbon nanotube (CNT) in aqueous media using polystyrene maleic acid (PSMA)-based polymer as surfactant was attempted to be subsequently used in the fabrication of high-performance ceramic matrix composites. Settling velocity under centrifugation analysis was experimentally evaluated as one of the stability criteria of the dispersion and pulsed nuclear magnetic resonance was used to evaluate the amount of adsorbed molecules. The settling velocity decreased considerably with the PSMA concentration up to the saturation at around 7 mass%, then further decreased gradually with PSMA. The former was thought to be based on the dissociation of CNT agglomerate and the latter would be attributed to the surfactant-induced network structure formed in the aqueous media.

DOI： 10.2497/jjspm.63.861

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Gastight, closed pore inclusive porous ceramics through a superplastically foaming method 査読

Akira Kishimoto, Atsuki Tohji, Takashi Teranishi, Hidetaka Hayashi

Ceramic for Environmental Systems 257 69 - 79 2016年5月

記述言語：英語掲載種別：論文集(書籍)内論文出版者・発行元：Wiley Blackwell

Our innovative superplastically foaming method was used to create closed-pore inclusive zirconia-based ceramics. Yttrium oxide was added to monoclinic zirconia to stabilize the matrix. Sintering and superplastic deformation were used to form a solid solution and transform it to a cubic phase. Porous ceramics formed via this post-stabilization method exhibited anomalous thermal expansion due to the silica derived from the foaming agent SiC. This anomalous thermal expansion disappeared following substitution of the SiC foaming agent for AlN. The resulting superplastically foamed porous ceramics exhibited large thermal conductivities, comparable to that of the fully densified ceramics, but with a porosity as great as 35%. This high thermal conductivity was attributed to the alumina derived from the foaming agent AlN. To suppress the formation of alumina, the samples were pre-sintered in an argon atmosphere. The modified superplastically foamed ceramics exhibited smaller pores, with a porosity of 33%, as well as favorable thermal insulation, with a thermal conductivity that was approximately half that of the fully dense material.

DOI： 10.1002/9781119234463.ch7

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Electrical Conductivity of Ceria-based Oxide under 24 GHz Millimeter-wave Heating in Varying Thermal Environments 査読

CHE ABDULLAH Salmie Suhana Binti, TERANISHI Takashi, HAYASHI Hidetaka, KISHIMOTO Akira

粉体および粉末冶金 63 ( 7 ) 663 - 667 2016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：一般社団法人粉体粉末冶金協会

<p>Sm-doped CeO₂ ceramics were prepared by conventional solid state method. The electrical conductivity of the samples was measured under conventional heating and 24 GHz millimeter-wave (MMW) heating, and the results were compared. During MMW heating, 5 mol% Sm-doped CeO₂ pellets with different thickness were used as susceptors, meanwhile Al₂O₃ fiber board was used as thermal insulator and its design varies by the number of open channels. The aforementioned susceptors and thermal insulators dependency of conductivity values during MMW heating were studied. Conductivity of samples under MMW heating was found to be higher than under conventional heating. Results showed that the different susceptor thickness and thermal insulator design could result in different conductivity values. These results were attributed to the phenomenon of heat dissipation from surface and the amount of direct radiation reached the sample. Specific susceptor thickness and specific insulator design which leads to highest conductivity were identified. By combining these two effects, the largest enhancement of conductivity of ceria based ceramics was obtained.</p>

DOI： 10.2497/jjspm.63.663

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Lithium ion conductivity of oriented Li0.33La0.56TiO3 solid electrolyte films prepared by a sol-gel process 査読

Takashi Teranishi*,Yuki Ishii,Hidetaka Hayashi*,Akira Kishimoto*

Solid State Ionics, Reactivity of Solids 284 1 - 6 2016年1月

セリア/ジルコニアセラミックス対のカチオン相互拡散に及ぼすミリ波照射の影響査読

脇本幹也、寺西貴志、林秀考、岸本昭

粉体および粉末冶金 63 ( 11 ) 981 - 985 2016年

In situ time-resolved dispersive X-ray absorption fine structure analysis of BaTiO3-LiCoO2 composites for lithium ion batteries 査読

Takashi Teranishi*,Yumi Yoshikawa,Ryota Miyahara,Hidetaka Hayashi*,Akira Kishimoto*,Misaki Katayama,Yasuhiro Inada

Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan, Yogyo Kyokai Shi/Journal of the Ceramic Society of Japan 124 ( 6 ) 659 - 663 2016年

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