Conduction Path of Li Ions at the Solid-Electrolyte/Electrode Interface (IMAGE)

Tokyo Institute of Technology

Conduction Path of Li Ions at the Solid-Electrolyte/Electrode Interface

Caption

(a) In the discharge process, Li ions migrate through the solid electrolyte to the interface. Since the LiCoO2 film is (0001)-oriented, the migration of Li ions into LiCoO2 is hindered by the CoO2 layers aligned parallel to the substrate surface. Therefore, Li ions migrate laterally on the surface of LiCoO2, and finally, diffuse into grain boundaries. (b) In the case of the disordered LiCoO2 surface, the diffusion of Li ions along the surface and into the grain boundary is restricted, resulting in a high interface resistance value.

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<I>ACS Applied Materials and Interfaces</I>

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