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SUMMARY:Ion Diffusion in Na Super Ionic Conductors (NaSICON)
DTSTART;VALUE=DATE-TIME:20220901T162000Z
DTEND;VALUE=DATE-TIME:20220901T164000Z
DTSTAMP;VALUE=DATE-TIME:20220826T122132Z
UID:indico-contribution-3715@indico.stfc.ac.uk
DESCRIPTION:Speakers: Rasmus Palm (KTH Royal Institute of Technology)\nLit
 hium-ion (Li-ion) batteries are commonly used as energy storage device for
  both mobile and stationary applications. Even though the Li-ion technolog
 y is clearly a huge success story for modern electrochemistry\, lately\, t
 here has been serious concerns regarding several aspects\, e.g.\, availabi
 lity and price of lithium raw material **[1]**. Consequently\, the industr
 y is currently and actively looking for alternatives to the Li-ion technol
 ogy. Here one option might be to simply replace lithium with its neighbour
  in the periodic table i.e. sodium (Na) **[2]**\, which is a more abundant
 \, accessible and less expensive element. A famous group of such compounds
  is the so-called Na Super Ionic Conductors (NaSICON). One of the material
 s within the NaSICON family that is known to have highly mobile sodium ion
 s is Na$_{1+x}$Ti$_{2-x}$Fe$_{x}$(PO$_{4}$)$_{3}$ **[3]**. Electrochemical
  measurements have suggested that substitution of Fe for Ti results in hig
 her capacity and better retention. Finally\, our own studies **[4\,5]** ha
 ve revealed enhancements of the battery performance by introducing a nano-
 scale coating of carbon onto the submicron-sized NaSICON particles. Howeve
 r\, the underlying mechanism for such effect is still partly unknown. In t
 his study we have investigated the microscopic Na-ion self-diffusion in Na
 $_{1+x}$Ti$_{2-x}$Fe$_{x}$(PO$_{4}$)$_{3}$ using the muon spin rotation ($
 \\mu^+$SR) technique **[6\,7]**. We present values of both activation ener
 gy of the diffusion process as well as temperature dependent Na-ion self-d
 iffusion coefficients ($D_{\\rm Na}$).\n\n**[1]** G. Alexander\, J.B. Good
 enough\, M. Månsson\, et al.\, Physica Scripta 95\, 062501 (2020) \n**[2]
 ** Kubota & Komaba\, J. Electrochem. Soc. 162\, A2538 (2015)\n**[3]** M.J.
  Aragón et al.\, J. Power Sources 252\, 208 (2014)\n**[4]** S. Difi et al
 .\, J. Phys. Chem. C 119\, 25220 (2015)\n**[5]** S. Difi et al.\, Hyperfin
 e Interact 237\, 61 (2016)\n**[6]** Sugiyama\, Månsson\, Phys. Rev. Lett.
  103\, 147601 (2009)\n**[7]** M. Månsson & J. Sugiyama\, Phys. Scr. 88\, 
 068509 (2013)\n\nhttps://indico.stfc.ac.uk/event/53/contributions/3715/
LOCATION:Science and Technology Campus\, University of Parma
URL:https://indico.stfc.ac.uk/event/53/contributions/3715/
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