FeMoO 4Cl, a 2-D-structure for amine intercalation, a 3-D-framework in alkali metal intercalated compounds

Abstract

FeMoO 4Cl exhibits a layered structure made of corner sharing FeO 4Cl square pyramids and MoO 4 tetrahedra. For the bilayer n-alkylmonoamines complexes, the intersheet distances increase continuously with the amine size leading to a true 2-D material. Chemical and electrochemical intercalation of alkali metal (Li or Na) leads to LiFeMoO 4Cl or NaFeMoO 4Cl. The presence of alkali ions between the FeMoO 4Cl layers leads to a decrease of the interlayer distance as a result of the coulombic attraction. The electrochemical study of the lithium system shows the existence of a large biphased domain between FeMoO 4Cl and Li 0.95FeMoO 4Cl and a solid solution around LiFeMoO 4Cl composition.