journal article·2021-01-25

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

Toyoki Okumura, Tomonari Takeuchi, Hironori Kobayashi

ACS Applied Energy Materials· Volume 4· Issue 1
Publisher page

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.
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Research context

OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · Thermal Expansion and Ionic Conductivity

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Affiliations

Research Institute of Electrochemical Energy, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan

Funding

Advanced Low Carbon Technology Research and Development Program

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