Neutron Diffraction and X-ray Absorption Spectroscopic Analyses for Lithiated Aurivillius-Type Layered Perovskite Oxide, Li2Bi4Ti3O12

The chemical lithiation of Aurivillius-type layered perovskite oxide, Bi 4 Ti 3 O 12 (BTO), was demonstrated for the first time. The crystal and electronic structures of the lithiated BTO were characterized by neutron diffaction and X-ray absorption spectroscopic analyses. According to the neutron diffaction studies, it has been found that the lithium atoms are positioned between a perovskite block and a Bi 2 O 2 layer. From the Bi L III - and Ti K-edge XANES/EXAFS analyses, it has been found that significant amounts of Bi and Ti cations are reduced due to the Li-intercalation, and that the local structure around Ti becomes more distorted.