Topotactic insertion of lithium in the layered structure Li{sub 4}VO(PO{sub 4}){sub 2}: The tunnel structure Li{sub 5}VO(PO{sub 4}){sub 2}

Journal Article · Tue Apr 15 04:00:00 EDT 2008 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2008.01.044· OSTI ID:21128272

Satya Kishore, M ^[1]; Caignaert, V; Malo, S; Hebert, S ^[1]; Varadaraju, U V ^[2]; Raveau, B ^[1]

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1. Laboratoire de Cristallographie et Sciences des Materiaux, ENSICAEN, Universite de Caen, CNRS, 6 Bd Marechal Juin, F-14050 Caen 4 (France)
2. Materials Science Research Centre, Indian Institute of Technology Madras, Chennai 6000036 (India)

A new V(III) lithium phosphate Li{sub 5}VO(PO{sub 4}){sub 2} has been synthesized by electrochemical insertion of lithium into Li{sub 4}VO(PO{sub 4}){sub 2}. This phase, which crystallizes in the space group I4/mcm, exhibits a tunnel structure closely related to the layered structure of Li{sub 4}VO(PO{sub 4}){sub 2} and to the tunnel structure of VO(H{sub 2}PO{sub 4}){sub 2}. The topotactic reactions that take place during lithium exchange and intercalation, starting from VO(H{sub 2}PO{sub 4}){sub 2} and going to the final phase Li{sub 5}VO(PO{sub 4}){sub 2} are explained on the basis of the flexible coordinations of V{sup 4+} and V{sup 3+} species. The electrochemical and magnetic properties of this new phase are also presented and explained on the basis of the structure dimensionality. - Graphical abstract: Electrochemical synthesis of a new 3D V(III) lithium phosphate, Li{sub 5}VO(PO{sub 4}){sub 2}. Starting from the 2D Li{sub 4}VO(PO{sub 4}){sub 2}, the topotactic reaction that take place during lithium intercalation is explained on the basis of the flexible coordinations of V{sup 4+} and V{sup 3+} species.

• OSTI ID: 21128272
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 4 Vol. 181; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ELECTRIC BATTERIES
ELECTROCHEMISTRY
LITHIUM IONS
LITHIUM PHOSPHATES
MAGNETIC PROPERTIES
SPACE GROUPS
SYNTHESIS
TETRAGONAL LATTICES
TRANSMISSION ELECTRON MICROSCOPY
VANADIUM IONS
VANADIUM OXIDES
VANADIUM PHOSPHATES