High Ionic Conductivity in a LiFeO2–LiAlO2 Composite Under H2/Air Fuel Cell Conditions |
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| Authors: | Rong Lan Shanwen Tao |
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| Affiliation: | Department of Chemical and Process Engineering, University of Strathclyde, Glasgow G1 1XJ (UK) |
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| Abstract: | 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. |
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| Keywords: | composites electrochemistry electronic conductors ionic conductor oxygen ion conductor |
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