Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Toyotaka Yuasa"'
Publikováno v:
Journal of Power Sources. 196:6884-6888
In order to develop safe lithium-ion batteries using Ni-based cathode active materials, such as LiNixMn(1−x)/2Co(1−x)/2O2, thermal stability is one of the most important requirements. We used XRD and TDS-MS in the first step of our study to eluci
Autor:
S. Yamauchi, Mitsuru Koseki, T. Sakai, Toyotaka Yuasa, T. Maeshima, Juichi Arai, Tatsuo Horiba, T. Yamaki
Publikováno v:
Journal of Power Sources. 146:788-792
A lithium secondary battery (Type II cell) for hybrid electric vehicles (HEV) was developed on the basis of previous battery techniques (Type I cell with amorphous carbon/Li 1 + x Mn 2 O 4 ). It used an improved cathode material and more advanced ele
Autor:
T. Niwa, T. Muroga, Haruhiko Kurosaki, Izumi Hirabayashi, Takeshi Kato, Tsukasa Hirayama, Y. Shiohara, Toyotaka Yuasa, Takeshi Araki, Yasuji Yamada, T. Saitoh, Yasuhiro Iijima
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 13:2803-2808
High critical current density (J/sub c/) YBa/sub 2/Cu/sub 3/O/sub 7-x/ films were routinely prepared by metalorganic deposition using trifluoroacetates (TFA-MOD). Although the growth scheme of the YBa/sub 2/Cu/sub 3/O/sub 7-x/ films has been studied,
Autor:
I. Hirabayashi, Toyotaka Yuasa, Tsukasa Hirayama, Takeshi Araki, Takeshi Kato, T. Saitoh, Yasuhiro Iijima, Yoshiteru Yamada
Publikováno v:
Physica C: Superconductivity. :1028-1032
Superconductor film of YBa2Cu3O7� d having high-Jc values was formed on a CeO2/YSZ buffered metal tape by the metal-organic deposition using trifluoroacetates (TFA-MOD) method. Transmission electron microscopy (TEM) confirmed the presence of micros
Autor:
I. Hirabayashi, Toyotaka Yuasa, Takeshi Araki, Haruhiko Kurosaki, Yoshiteru Yamada, T. Saitoh, Yasuhiro Iijima
Publikováno v:
Physica C: Superconductivity. :821-824
Metalorganic deposition using trifluoroacetates (TFA-MOD) with dip coating was applied for the preparation of YBCO coated conductor. The thickness of the dip-coated films increases with the 0.364th power of the withdrawal speed of substrates. This re
Autor:
Yasuhiro Iijima, Yasuo Takahashi, Toyotaka Yuasa, Takeshi Araki, SeokBeom Kim, Haruhiko Kurosaki, Izumi Hirabayashi, Kaoru Takeda, Yutaka Yamada
Publikováno v:
Physica C: Superconductivity. :1007-1010
Metalorganic deposition process using trifluoroacetate (TFA-MOD) processed YBCO film on LaAlO 3 and IBAD (YSZ/Hastelloy) substrate exhibited high critical current density, J c , at 77.3 K. The obtained J c values at 0 T were 7 and 1.7 MA/cm 2 for LaA
Autor:
Yasuji Yamada, Haruhiko Kurosaki, Izumi Hirabayashi, Toshihiko Maeda, Tomonori Watanabe, K. Wada, SeokBeom Kim, Toyotaka Yuasa
Publikováno v:
Physica C: Superconductivity. :938-941
We have deposited Y 2 O 3 buffer layers by metal-organic chemical vapor deposition (MOCVD) on textured Ni tapes coated with biaxially aligned NiO(1 0 0) layers grown by surface oxidation epitaxy method. X-ray diffraction measurements showed that Y 2
Autor:
Toyotaka Yuasa, SeokBeom Kim, Toshihiko Maeda, Haruhiko Kurosaki, Izumi Hirabayashi, Kazutoshi Higashiyama
Publikováno v:
Physica C: Superconductivity. :934-937
In case of the cube textured (CUTE) Ag substrate, recrystallization process of as-rolled Ag substrate in various atmosphere changed surface flatness of the substrate. When the substrate was heated in a vacuum chamber with a oxygen partial pressure of
Autor:
Toshihiro Suga, Tomonori Watanabe, Toyotaka Yuasa, Kaname Matsumoto, Toshihiko Maeda, Yasuji Yamada, Haruhiko Kurosaki, Izumi Hirabayashi, SeokBeom Kim
Publikováno v:
Physica C: Superconductivity. :1042-1045
By means of a liquid-phase epitaxy (LPE) process, superconducting YBa2Cu3O7−δ (YBCO) thick film is grown on a biaxially textured NiO buffer layer which is pulsed-laser deposited on a (0 0 1) surface of SrTiO3 single crystal. Employment of BaF2-add
Autor:
Toyotaka Yuasa, Takeshi Araki, Yutaka Yamada, Yasuo Takahashi, SeokBeom Kim, Yasuhiro Iijima, Kaoru Takeda, K. Yamigiwa, Izumi Hirabayashi
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 11:2869-2872
Metalorganic deposition (MOD) using trifluoroacetates is considered to be one of the most promising methods for coated conductors, because it enables us to obtain very high J/sub c/ films with low-cost facilities. We have optimized various processing