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All-Solid-State Batteries with LiCoO<sub>2</sub>-Type Electrodes: Realization of an Impurity-Free Interface by Utilizing a Cosinterable Li<sub>3.5</sub>Ge<sub>0.5</sub>V<sub>0.5</sub>O<sub>4</sub> Electrolyte

Toyoki Okumura, Tomonari Takeuchi, H. Kobayashi

2020ACS Applied Energy Materials22 citationsDOI

Abstract

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 LiMO2 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 × 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.

Topics & Concepts

Materials scienceElectrolyteElectrodeThermal stabilityImpurityOxideConductivityLithium (medication)Fast ion conductorInorganic chemistryContext (archaeology)Chemical engineeringChemistryPhysical chemistryMetallurgyPaleontologyBiologyEndocrinologyOrganic chemistryEngineeringMedicineAdvanced Battery Materials and TechnologiesAdvancements in Battery MaterialsThermal Expansion and Ionic Conductivity
All-Solid-State Batteries with LiCoO<sub>2</sub>-Type Electrodes: Realization of an Impurity-Free Interface by Utilizing a Cosinterable Li<sub>3.5</sub>Ge<sub>0.5</sub>V<sub>0.5</sub>O<sub>4</sub> Electrolyte | Litcius