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Keywords:

  • LiCoO2;
  • metal oxide cathodes;
  • lithium-ion batteries;
  • nanoindentations;
  • fracture toughness
Thumbnail image of graphical abstract

Young's elastic modulus, hardness, and fracture toughness (KIc) of individual grains are reported for polycrystalline LiCoO2, a metal oxide cathode used in lithium-ion batteries, as measured via instrumented nanoindentation (indentations within circled locations; dashed line indicates grain boundary). The wide range of KIc does not correlate strongly with grain orientation.