| Project/Area Number |
06555270
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
無機工業化学
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| Research Institution | University of Osaka Prefecture |
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Principal Investigator |
TATSUMISAGO Masahiro Univ.Osaka Pref., Assoc.Prof, 工学部, 助教授 (50137238)
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| Co-Investigator(Kenkyū-buntansha) |
KONDO Shigeo Matsushita Battery Co, 技術研究所, 室長
TAKAHASHI Masanari Osaka Manucipal tech.Res.Inst, 無機化学課, 研究員
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| Project Period (FY) |
1994 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥6,300,000 (Direct Cost: ¥6,300,000)
Fiscal Year 1995: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1994: ¥4,500,000 (Direct Cost: ¥4,500,000)
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| Keywords | Oxysulfide glass / Rapid quenching / Lithium ion conduction / Solid electrolyte / Solid lithium battery / Glass structure / Mixed anion effect / Solid state NMR |
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| Research Abstract |
(1) Glasses in the systems Li_2S-SiS_2-Li_xMO_y (Li_xMO_y = Li_3PO_4, Li_4SiO_4, Li_4GeO_4, Li_2SO_4, Li_2WO_4) were prepared by using twin-roller rapid quenching. The doping of Li_3PO_4 Provided the most extended glass-forming region.
(2) The difference between Tg and Tc, which is one of the measures of the glass stability, was maximized at the composition with 5 mol% Li_xMO_y.
(3) The glasses with 5 mol% Li_xMO_y exhibited high conductivities of about 10^<-3> Scm^<-1>.
(4) ^<29> MAS-NMR spectra revealed that a large number of silicon atoms in the glasses were coordinated with both sulfur and oxygen atoms.
(5) The fraction of the SiO_nS^<4-n> in the oxysulfide glasses was larger in the order of Li_4GeO_4 < Li_4SiO_4 < Li_3PO_4 as dopants.
(6) The combination of bridging oxygen atoms and non-bridging sulfur atoms may result in the enhancement of lithium ion mobility.
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