Extremely Low Resistance of Li3PO4 Electrolyte/Li(Ni0.5Mn1.5)O4 Electrode Interfaces

Hideyuki Kawasoko, Susumu Shiraki, Toru Suzuki, Ryota Shimizu, Taro Hitosugi

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

Solid-state Li batteries containing Li(Ni0.5Mn1.5)O4 as a 5 V-class positive electrode are expected to revolutionize mobile devices and electric vehicles. However, practical applications of such batteries are hampered by the high resistance at their solid electrolyte/electrode interfaces. Here, we achieved an extremely low electrolyte/electrode interface resistance of 7.6 ω cm2 in solid-state Li batteries with Li(Ni0.5Mn1.5)O4. Furthermore, we observed spontaneous migration of Li ions from the solid electrolyte to the positive electrode after the formation of the electrolyte/electrode interface. Finally, we demonstrated stable fast charging and discharging of the solid-state Li batteries at a current density of 14 mA/cm2. These results provide a solid foundation to understand and fabricate low-resistance electrolyte/electrode interfaces.

Original languageEnglish
Pages (from-to)27498-27502
Number of pages5
JournalACS Applied Materials and Interfaces
Volume10
Issue number32
DOIs
Publication statusPublished - 2018 Aug 15

Keywords

  • Li(NiMn)O
  • activation energy
  • epitaxial thin film
  • interface resistance
  • solid electrolyte
  • solid-state Li batteries

ASJC Scopus subject areas

  • Materials Science(all)

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