Drastic Reduction of the Solid Electrolyte–Electrode Interface Resistance via Annealing in Battery Form
Source abstract
Abstract
The origin of electrical resistance at the interface between the positive electrode and solid electrolyte of an all-solid-state Li battery has not been fully determined. It is well known that the interface resistance increases when the electrode surface is exposed to air. However, an effective method of reducing this resistance has not been developed. This report demonstrates that drastic reduction of the resistance is achievable by annealing the entire battery cell. Exposing the LiCoO2 positive electrode surface to H2O vapor increases the resistance by more than 10 times (to greater than 136 Ω cm2). The magnitude can be reduced to the initial value (10.3 Ω cm2) by annealing the sample in a battery form. First-principles calculations reveal that the protons incorporated into the LiCoO2 structure are spontaneously deintercalated during annealing to restore the low-resistance interface. These results provide fundamental insights into the fabrication of high-performance all-solid-state Li batteries.
Source: europepmc · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Advanced Battery Technologies Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Materials and Chemical Technology, Tokyo Institute of Technology, Meguro, Tokyo 152-8552, Japan
Department of Materials Engineering, The University of Tokyo, Tokyo 113-8656, Japan
National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan
Faculty of Science, Yamagata University, Yamagata 990-8560, Japan
Tokyo Electron Technology Solutions Limited, 650 Mitsuzawa, Hosaka−cho, Nirasaki, Yamanashi 407-0192, Japan
PRESTO, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan
Funding
Core Research for Evolutional Science and Technology · Precursory Research for Embryonic Science and Technology · Japan Society for the Promotion of Science
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