Search

Your search keyword '"Oshima, Masaharu"' showing total 11 results
Start Over Author "Oshima, Masaharu" Journal journal of power sources
11 results on '"Oshima, Masaharu"'

8. Charge/discharge mechanism of a new Co-doped Li 2 O cathode material for a rechargeable sealed lithium-peroxide battery analyzed by X-ray absorption spectroscopy

Author

Ogasawara, Yoshiyuki, primary, Hibino, Mitsuhiro, additional, Kobayashi, Hiroaki, additional, Kudo, Tetsuichi, additional, Asakura, Daisuke, additional, Nanba, Yusuke, additional, Hosono, Eiji, additional, Nagamura, Naoka, additional, Kitada, Yuta, additional, Honma, Itaru, additional, Oshima, Masaharu, additional, Okuoka, Shin-ichi, additional, Ono, Hironobu, additional, Yonehara, Koji, additional, Sumida, Yasutaka, additional, and Mizuno, Noritaka, additional

Published
2015
Full Text
View/download PDF

10. X-ray photoemission spectroscopy analysis of N-containing carbon-based cathode catalysts for polymer electrolyte fuel cells

Author

Niwa, Hideharu, primary, Kobayashi, Masaki, additional, Horiba, Koji, additional, Harada, Yoshihisa, additional, Oshima, Masaharu, additional, Terakura, Kiyoyuki, additional, Ikeda, Takashi, additional, Koshigoe, Yuka, additional, Ozaki, Jun-ichi, additional, Miyata, Seizo, additional, Ueda, Shigenori, additional, Yamashita, Yoshiyuki, additional, Yoshikawa, Hideki, additional, and Kobayashi, Keisuke, additional

Published
2011
Full Text
View/download PDF

11. Resonant photoemission spectroscopy of the cathode material Li x Mn0.5Fe0.5PO4 for lithium-ion battery

Author

Kurosumi, Shodai, Horiba, Koji, Nagamura, Naoka, Toyoda, Satoshi, Kumigashira, Hiroshi, Oshima, Masaharu, Furutsuki, Sho, Nishimura, Shin-ichi, Yamada, Atsuo, and Mizuno, Noritaka

Subjects
*PHOTOELECTRON spectroscopy, *CATHODES, *LITHIUM-ion batteries, *ELECTRONIC structure, *TRANSITION metals, *OXIDATION-reduction reaction, *PHOSPHATES
Abstract

Abstract: We have investigated the change in the electronic structure of Li x Mn0.5Fe0.5PO4 through the charge process, especially in the transition metal partial DOS using X-ray absorption and resonant photoemission spectroscopy measurements. The oxidation reaction between Fe2+ and Fe3+ proceeds while the 0.5 Li ions are extracted from LiMn0.5Fe0 .5PO4. Moreover, comparing resonant photoemission spectra of Li x Mn0.5Fe0.5PO4 with those of Li x FePO4, we have found that both spectral line-shapes are almost identical, suggesting that the strong localization of the Fe 3d states in the LiMn0.5Fe0.5PO4 system. On the other hand, in Mn 2p–3d X-ray absorption and resonant photoemission spectra, the Mn oxidation reaction from Mn2+ to Mn3+ partially occurs and Mn 3d states of Li x Mn0.5Fe0.5PO4 remain almost unchanged through the charge reaction. Reflecting the difference in the strength of the interaction between the transition metal Fe or Mn ions and the oxygen ions, it is suggested that although the oxidation from Fe2+ to Fe3+ proceeds largely on Fe ions during the charge reaction from x = 1.0 to 0.5, the charge compensation for the electron exchange mainly occurs not only at the Mn ions but also at the poly-anion sites during the charge reaction from x = 0.5 to 0. [Copyright &y& Elsevier]

Published
2013
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results