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SUMMARY:The simulated synthesis of nanostructured Li2MnO3 cathode material
 s
DTSTART;VALUE=DATE-TIME:20210727T134500Z
DTEND;VALUE=DATE-TIME:20210727T140000Z
DTSTAMP;VALUE=DATE-TIME:20260713T191322Z
UID:indico-contribution-7115@events.saip.org.za
DESCRIPTION:The realisation of advanced lithium-ion battery (LIB) technolo
 gies has been hindered by the slow progress in discovering high capacity c
 athodes. Considerable research is focused on the lithium-rich layered Li2M
 nO3 owing to its ability to reversibly intercalate more lithium. However\,
  the cycling of this material results in capacity degradation due to compl
 ex phenomena such as the irreversible oxygen loss and phase transformation
  caused by lattice reconstruction. Herein\, a series of nanostructured Li2
 MnO3 models have been generated via the simulated amorphisation and recrys
 tallisation (A+R) technique and their internal microstructures interrogate
 d during the cycling process. The charging process involved the concurrent
  removal of lithium (Li) and oxygen (O) ions to restrain the release of ox
 ygen and resulted in Li2-xMnO3-x  composites. Detailed analysis of these c
 omposites reveals that the models crystallised into multiple grains which 
 increased with decreasing Li/O content along with stacking faults and vaca
 ncies thus leading to Mn ions migrating to the Li layers. The internal mic
 rostructures display a wealth of defects leading to the emergence of disto
 rted cubic spinel LiMn2O4\, Li2MnO3 and LiMnO2 polymorphs. Characterisatio
 n of the x-ray diffraction patterns revealed peak broadening along with th
 e growing of 2Θ~18-25 and 2Θ~29⁰ peaks associated with the spinel-like
  phase. These results shed insights on the mechanism that takes place duri
 ng the cycling of the Li2MnO3  with complex structures and will help guide
  the optimisation of high-capacity energy storages.\n\nhttps://events.saip
 .org.za/event/206/contributions/7115/
LOCATION:North-West University Potchefstroom Campus
URL:https://events.saip.org.za/event/206/contributions/7115/
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