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RESEARCH PRODUCT
(Invited) The Effect of (La,Sr)MnO 3 Cathode Surface Termination on Its Electronic Structure
Maija M. KukljaYuri A. MastrikovEugene A. KotominRotraut MerkleJoachim Maiersubject
DipoleCondensed matter physicsChemical bondChemistrylawDensity of statesSlabCharge densityElectronic structureCathodeIonlaw.inventiondescription
La1-xSrxMnO3 (LSM) was one of the first perovskites used as SOFC cathode material. Its (001) surface has two possible terminations, LaSrO and MnO2, with quite different properties and oxygen reduction efficiencies. To avoid effects of surface polarity and the dipole moment across the material, symmetric non-stoichiometric slabs are commonly used in theoretical calculations with identical terminating planes on its both sides. We analyzed the dependence of the electronic structure (density of states) and charge distribution (effective atomic charges and chemical bond covalency) on the slab termination and Mn ion oxidation state (controlled by the Sr content and slab nonstoichiometry).
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-05-03 | ECS Transactions |