High Ionic Conductivity in a LiFeO2–LiAlO2 Composite Under H2/Air Fuel Cell Conditions

Rong Lan, Shanwen Tao

    Research output: Contribution to journalArticlepeer-review

    27 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
    Early online date13 Nov 2014
    Publication statusPublished - 12 Jan 2015


    • composites
    • electrochemistry
    • electronic conductors
    • ionic conductor
    • oxygen ion conductor


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