In Situ Direct Lithium Distribution Analysis Around Interfaces in an All-Solid-State Rechargeable Lithium Battery by Combined Ion-Beam Method

Bun Tsuchiya, Junji Ohnishi, Yoshitaka Sasaki, Takayuki Yamamoto, Yuta Yamamoto, Munekazu Motoyama, Yasutoshi Iriyama, Kenji Morita

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

Charge–discharge reaction in all-solid-state battery (SSB) is governed by Li-ion movements and large resistance at solid–solid interface degrades rate capability of the SSBs. Thus, lithium (Li) distribution and its movement around interface in static or operated SSBs should be clarified well. Here, it is reported that combined ion beam analysis of high-energy elastic recoil detection and Rutherford backscattering spectrometry probing 9.0 MeV O4+ beams is a powerful technique to clarify static Li distribution around the interface, and that relative Li concentration change is correctly detected with reliable depth resolution in a few tens of nm scale. It is interesting to note that Li deficient region is formed inside the Li+-conductive crystalline glass solid electrolyte, LATP, at around the LiCoO2/LATP interface with the thickness of 120 ± 30 nm. Additionally, presence of hydrogen around both interfaces and their migration with the voltages are also detected.

Original languageEnglish
Article number1900100
JournalAdvanced Materials Interfaces
Volume6
Issue number14
DOIs
Publication statusPublished - Jul 23 2019
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering

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