TY - JOUR
T1 - High ionic conductivity in a LiFeO2-LiAlO2 composite under H2/air fuel cell conditions
AU - Lan, Rong
AU - Tao, Shanwen
N1 - This is the peer reviewed version of the following article: Lan, R., & Tao, S. (2015). High ionic conductivity in a LiFeO2-LiAlO2 composite under H2/air fuel cell conditions. Chemistry - A European Journal , 21(3), 1350-1358, which has been published in final form at http://dx.doi.org/10.1002/chem.201404476. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving
PY - 2015/1/12
Y1 - 2015/1/12
N2 - 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.
AB - 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.
KW - composites
KW - electrochemistry
KW - electronic conductors
KW - ionic conductor
KW - oxygen ion conductor
UR - http://www.scopus.com/inward/record.url?scp=84920792872&partnerID=8YFLogxK
UR - http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1521-3765
U2 - 10.1002/chem.201404476
DO - 10.1002/chem.201404476
M3 - Article
AN - SCOPUS:84920792872
SN - 0947-6539
VL - 21
SP - 1350
EP - 1358
JO - Chemistry - A European Journal
JF - Chemistry - A European Journal
IS - 3
ER -