Zobrazeno 1 - 10 of 12 pro vyhledávání: '"Tetsuo Nagami"'
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Akademický článek
Capacity Deterioration Analysis of Li-ion Battery Cathode Li[Ni1/3Co1/3Mn1/3]O2 Material by Soft X-ray Absorption Spectroscopy
Autor: Tetsuo NAGAMI, Toyokazu NOMOTO, Harue SUGIYAMA, Shoji TACHIKI, Ren SAKAMOTO, Toshiaki OHTA
Publikováno v: Electrochemistry, Vol 89, Iss 4, Pp 363-369 (2021)
We report detailed studies of capacity deterioration mechanism of Li[Ni1/3Co1/3Mn1/3]O2 (NCM) cathode after several numbers of cycling with the voltage range of 3.0–4.1 V/cell at 85 °C and after storage at charged states (3.7, 4.0 and 4.1 V/cell)
Externí odkaz: https://doaj.org/article/67e1e8c2275d414c943178a67f576ff6
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2
Synthesis of Carbon-Supported Pt-YOxand PtY Nanoparticles with High Catalytic Activity for the Oxygen Reduction Reaction Using a Microwave-based Polyol Method
Autor: Keiko Uto, Akiko Muto, Tetsuo Nagami, Masaharu Tsuji, Jun Ichiro Hayashi, Hideoki Fukushima
Publikováno v: ChemCatChem. 9:962-970
Carbon-supported PtY alloy nanoparticles were prepared as oxygen-reduction reaction (ORR) catalysts by reducing a mixture of cis-[Pt(NH3)2(NO2)2] or Pt(C5H7O2)2 and Y(CH3COO)3·4H2O in ethylene glycol (EG) with microwave (MW) heating. Microstructure
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::23d15f6a1ec03849269e1619bcbe5e55
https://doi.org/10.1002/cctc.201601479
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3
Modified linear combination fitting for large-area two-dimensional chemical state mapping
Autor: Shingo Takeda, Suzuki Toshimasa, Shunsuke Konishi, Ren Sakamoto, Tetsuo Nagami, Masao Tabuchi
Publikováno v: Radiation Physics and Chemistry. 175:108257
In order to reduce the XAFS/XANES measurement time for the wide area two- or three-dimensional chemical state mapping, modified linear combination fitting method have been developed. When the method is used, we can analyze the chemical states by meas
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::acc094c176e655edc37e073ccecd6354
https://doi.org/10.1016/j.radphyschem.2019.04.007
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4
Innovative catalyst supports to address fuel cell stack durability
Autor: Audrey Celine Vecoven, Isotta Cerri, Claire Mormiche, J.C. Davies, Brian E. Hayden, Tetsuo Nagami
Publikováno v: International Journal of Hydrogen Energy. 38:640-645
To successfully penetrate the automotive market, cost-efficient and durable fuel cell technologies are necessary to compete with existing mature technologies. Extensive automotive field tests have demonstrated that the membrane-electrode-assembly pla
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f82b18137613e51120aecd807dd1c716
https://doi.org/10.1016/j.ijhydene.2012.06.089
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5
In situ S-K XANES study of polymer electrolyte fuel cells: changes in the chemical states of sulfonic groups depending on humidity
Autor: Masaaki Yoshida, Hiroshi Kondoh, Kazuhisa Isegawa, Shinji Jomori, Tetsuo Nagami
Publikováno v: Physical chemistry chemical physics : PCCP. 18(36)
Changes in the chemical states of sulfonic groups of Nafion in polymer electrolyte fuel cells (PEFCs) under gas-flowing conditions were studied using in situ S-K XANES spectroscopy. The applied potential to the electrodes and the humidity of the cell
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3324291cc2827204d2ad804a0cfa5b89
https://pubmed.ncbi.nlm.nih.gov/27711620
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6
Metal Oxide-Supported Platinum Overlayers as Proton-Exchange Membrane Fuel Cell Cathodes
Autor: Frank Abild-Pedersen, Isotta Cerri, Jan Rossmeisl, Felix Studt, Thomas Bligaard, Tetsuo Nagami, Vladimir Tripkovic
Publikováno v: ChemCatChem. 4:228-235
We investigated the activity and stability of n=(1, 2, 3) platinum layers supported on a number of rutile metal oxides (MO2; M=Ti, Sn, Ta, Nb, Hf and Zr). A suitable oxide support can alleviate the problem of carbon corrosion and platinum dissolution
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3130605bb880c44461f8bebc62f3ef08
https://doi.org/10.1002/cctc.201100308
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8
In situ Liquid TEM Study for Degradation Mechanisms of Fuel Cell Catalysts during Potential Cycling Test
Autor: Hisao Kato, Keisuke Kishita, Tetsuo Nagami, Shinya Nagashima, Toshihiro Ikai, Yipu Kang, Kun Liu, Kenta Yoshida, Tomoki Hiroyama
Publikováno v: Microscopy and Microanalysis. 21:1295-1296
1. Materials Research and Development Laboratory, Japan Fine Ceramics Center, Atsuta-ku, Nagoya, 456-8587, Japan 2. Nanostructures Research Laboratory, Japan Fine Ceramics Center, Atsuta-ku, Nagoya, 456-8587, Japan 3. Institute for Advanced Research,
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::25601a2a79afd407ab01098f88fc2770
https://doi.org/10.1017/s1431927615007266
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9
Platinum redispersion on metal oxides in low temperature fuel cells
Autor: Thomas Bligaard, Isotta Cerri, Vladimir Tripkovic, Tetsuo Nagami, Jan Rossmeisl
Publikováno v: Physical chemistry chemical physics : PCCP. 15(9)
We have analyzed the aptitude of several metal oxide supports (TiO(2), SnO(2), NbO(2), ZrO(2), SiO(2), Ta(2)O(5) and Nb(2)O(5)) to redisperse platinum under electrochemical conditions pertinent to the Proton Exchange Membrane Fuel Cell (PEMFC) cathod
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ac5a5a0dc9b969a76f8968cb4031d739
https://pubmed.ncbi.nlm.nih.gov/23358311
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