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How Li diffusion in...
How Li diffusion in spinel Li[Ni1/2Mn3/2]O4 is seen with μ ±SR
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- Sugiyama, Jun (författare)
- Neutron Science and Technology Center, Comprehensive Research Organization for Science and Society (CROSS) , Shirakata, 162-1, 319-1106 Tokai , Naka , Ibaraki , Japan
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- Ohishi, Kazuki (författare)
- Neutron Science and Technology Center, Comprehensive Research Organization for Science and Society (CROSS) , Shirakata, 162-1, 319-1106 Tokai , Naka , Ibaraki , Japan
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- Forslund, Ola Kenji (författare)
- KTH,Material- och nanofysik
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- Månsson, Martin, As. Prof. 1976- (författare)
- KTH,Material- och nanofysik
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- Cottrell, Stephen P. (författare)
- ISIS Pulsed Neutron and Muon Facility, STFC Rutherford Appleton Laboratory , Harwell OX11 0QX Oxford , Didcot , UK
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- Hillier, Adrian D. (författare)
- ISIS Pulsed Neutron and Muon Facility, STFC Rutherford Appleton Laboratory , Harwell OX11 0QX Oxford , Didcot , UK
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- Ishida, Katsuhiko (författare)
- Meson Science Laboratory, RIKEN , Hirosawa, 2-1, 351-0198 Wako , Saitama , Japan
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(creator_code:org_t)
- 2021-09-06
- 2021
- Engelska.
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Ingår i: Zeitschrift fur physikalische Chemie (Munchen. 1991). - : Walter de Gruyter GmbH. - 0942-9352 .- 2196-7156.
- Relaterad länk:
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https://doi.org/10.1...
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https://kth.diva-por... (primary) (Raw object)
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https://www.degruyte...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The diffusive behavior in a spinel-type Li+ ion battery material, Li[Ni1/2Mn3/2]O4, has been studied with positive and negative muon spin rotation and relaxation (μ±SR) measurements in the temperature range between 200 and 400 K using a powder sample. The implanted μ+ locates at an interstitial site near O2- ion so as to form a O-H like bond, while the implanted μ- is mainly captured by an oxygen nucleus, resulting in the formation of muonic oxygen. This means that local magnetic environments in Li[Ni1/2Mn3/2]O4 were investigated from the two different sites in the lattice, i.e., one is an interstitial site for μ+SR and the other is an oxygen site for μ-SR. Since both μ+SR and μ-SR detected an increase in the fluctuation rate of a nuclear magnetic field for temperatures above 200 K, the origin of this increase is clearly confirmed as Li diffusion. Assuming a random walk process with the hopping of thermally activated Li+ between a regular Li site and the nearest neighboring vacant octahedral sites, a self-diffusion coefficient of Li+ was found to range above 10-11 cm2/s at temperatures above 250 K with an activation energy of about 0.06 eV.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- Physical and Theoretical Chemistry
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