科研之友
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摘要
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 -LiFeO2 and an insulator -LiAlO2. High conductivity was observed in the -LiFeO2--LiAlO2 composite when prepared by a solid state reaction method. However, the conductivity enhancement in -LiFeO2--LiAlO2 composite was not observed when the two oxides were mechanically mixed. The -LiFeO2--LiAlO2 composite also exhibits O2- or/and H+ ionic conduction which was confirmed through H-2/air fuel cell measurements. An exceptionally high conductivity of 0.50Scm(-1) at 650 degrees C was observed under H-2/air fuel cell conditions. This provides a new approach to discover novel ionic conductors from composite materials derived from electronic conductors.
- 出版日期2015-1-12
