BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Na$^+$ self-diffusion in Co-substituted Na$_2$Ni$_2$$_-$$_x$Co$_x$
 TeO$_6$ Na-ion battery cathode material
DTSTART;VALUE=DATE-TIME:20220830T154000Z
DTEND;VALUE=DATE-TIME:20220830T160000Z
DTSTAMP;VALUE=DATE-TIME:20220826T120839Z
UID:indico-contribution-3707@indico.stfc.ac.uk
DESCRIPTION:Speakers: Rasmus Palm (KTH Royal Institute of Technology)\nNa$
 _2$Ni$_2$TeO$_6$ honeycomb layered oxide has suitable properties for use a
 s a Na-ion battery cathode material. The substitution of Ni with Co has be
 en shown to have a detrimental effect on the energy density of Na$_2$Ni$_2
 $$_-$$_x$Co$_x$TeO$_6$\, whereas the plateau potential vs Na$^+$/Na increa
 ses. Thus\, to ascertain the cause of the electrochemical properties chang
 e upon substituting Ni with Co Na-ion self-diffusion properties are invest
 igated with the use of zero field and longitudinal field $μ^+$SR methods 
 in Na$_2$Ni$_2$$_-$$_x$Co$_x$TeO$_6$ with $x$ of 0.0\, 1.0 and\, 1.5. Na-i
 on site occupancies and crystal structure was determined from neutron powd
 er diffraction measurements and used for the determination of Na-ion jump 
 paths. All measurements were performed in a temperature range from 50 K to
  550 K. Three distinct Na-ion sites are determined from the neutron powder
  diffraction measurements. In addition\, two distinct temperature regions 
 for Na-ion self-diffusion\, with different Na-ion diffusion pathways\, are
  determined and analysed. The Na-ion diffusional pathway dependence on the
  substitution of Ni with Co is shown and discussed. Based on the obtained 
 results we propose a cause for the decrease in the capacity\, with the sim
 ultaneous increase in plateau potential vs Na$^+$/Na\, with the increased 
 substitution of Ni with Co. Based on the results\, a roadmap on how to fur
 ther improve Na$_2$Ni$_2$$_-$$_x$Co$_x$TeO$_6$-based Na-ion battery cathod
 e materials is given.\n\nhttps://indico.stfc.ac.uk/event/53/contributions/
 3707/
LOCATION:Science and Technology Campus\, University of Parma
URL:https://indico.stfc.ac.uk/event/53/contributions/3707/
END:VEVENT
END:VCALENDAR