Atomically Well-Ordered Structure at Solid Electrolyte and Electrode Interface Reduces the Interfacial Resistance

Susumu Shiraki, Tetsuroh Shirasawa, Tohru Suzuki, Hideyuki Kawasoko, Ryota Shimizu, Taro Hitosugi

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Using synchrotron surface X-ray diffraction, we investigated the atomic structures of the interfaces of a solid electrolyte (Li 3 PO 4 ) and electrode (LiCoO 2 ). We prepared two types of interfaces with high and low interface resistances; the low-resistance interface exhibited a flat and well-ordered atomic arrangement at the electrode surface, whereas the high-resistance interface showed a disordered interface. These results indicate that the crystallinity of LiCoO 2 at the interface has a significant impact on interface resistance. Furthermore, we reveal that the migration of Li ions along the interface and into grain boundaries and antiphase domain boundaries is a critical factor reducing interface resistance.

Original languageEnglish
Pages (from-to)41732-41737
Number of pages6
JournalACS Applied Materials and Interfaces
Volume10
Issue number48
DOIs
Publication statusPublished - 2018 Dec 5

Keywords

  • Li PO
  • LiCoO
  • X-ray crystal truncation rod scattering
  • all-solid-state battery
  • interface resistance
  • solid-electrolyte/electrode interface
  • thin film

ASJC Scopus subject areas

  • Materials Science(all)

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