All-Solid-State Batteries with LiCoO2-Type Electrodes: Realization of an Impurity-Free Interface by Utilizing a Cosinterable Li3.5Ge0.5V0.5O4 Electrolyte

An impurity-free interface was achieved in an oxide-based all-solid-state battery (ASSB) after cosintering, which was facilitated by an enhanced thermal stability between the layered rock-salt LiMO, electrode materials (LiCoO2 or LiNi1/3Mn1/3Co1/3O2 (NMC)) and a lithium superionic conductor (LISICON)-type Li3.5Ge0.5V0.5O4 (LGVO) electrolyte. The ionic conductivity of LGVO reached 9.6 X 10(-5) S cm(-1), which is the highest reported conductivity for an LISICON oxide. These characteristics facilitated a good reversible capacity in the NMC electrode in an ASSB fabricated via cosintering. The high interfacial thermal stability between LiMO2 and LISICON is a useful property in the context of oxide-based ASSBs.

Automated summary

An impurity-free interface was achieved in an oxide-based all-solid-state battery (ASSB) through cosintering, with enhanced thermal stability between the LiMO electrode materials and LISICON-type LGVO electrolyte. The high ionic conductivity of LGVO facilitated good reversible capacity in the NMC electrode, making it a promising property in oxide-based ASSBs.