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Keywords:

  • cathodes;
  • lithium batteries;
  • modeling;
  • pyrophosphate
Thumbnail image of graphical abstract

Ion-transport paths: Combined modeling and neutron diffraction studies provide atomic-scale insights into Li2FeP2O7, a material proposed for a new lithium-battery cathode with reversible electrode operation at the highest voltage of all known Fe-based phosphates. The results indicate that Li+ ions are transported rapidly through a 2D network along the paths shown in green in the picture.