High ionic conductivity in a LiFeO2-LiAlO2 composite under H2/air fuel cell conditions

Rong Lan, Shanwen Tao*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)


New ionic conducting materials for electrolytes for electrochemical devices have been attracting the interest of researchers in energy materials. Here, for the first time, we report a conductive composite with high ionic conductivity derived from an electronic conductor α-LiFeO2 and an insulator γ-LiAlO2. High conductivity was observed in the α-LiFeO2-γ-LiAlO2 composite when prepared by a solid state reaction method. However, the conductivity enhancement in α-LiFeO2-γ-LiAlO2 composite was not observed when the two oxides were mechanically mixed. The α-LiFeO2-γ-LiAlO2 composite also exhibits O2- or/and H+ ionic conduction which was confirmed through H2/air fuel cell measurements. An exceptionally high conductivity of 0.50 S cm-1 at 650°C was observed under H2/air fuel cell conditions. This provides a new approach to discover novel ionic conductors from composite materials derived from electronic conductors.

Original languageEnglish
Pages (from-to)1350-1358
Number of pages9
JournalChemistry - A European Journal
Issue number3
Publication statusPublished - 12 Jan 2015


  • Composites
  • Electrochemistry
  • Electronic conductors
  • Ionic conductor
  • Oxygen ion conductor


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