Synthesis, crystal structure and magnetic properties of a new lithium cobalt metaphosphate, LiCo(PO{sub 3}){sub 3}
- LG Chem Research Park, Daejeon 305-380 (Korea, Republic of)
A new lithium cobalt metaphosphate, LiCo(PO{sub 3}){sub 3}, is reported for the first time, which was discovered during the exploratory synthesis in Li-Co-P-O system by solid state reaction. The structure has been refined by powder X-ray Rietveld refinement method (P2{sub 1}2{sub 1}2{sub 1}, a = 8.5398(2) A, b = 8.6326(2) A and c = 8.3520(2) A, Z = 4, R {sub p} = 13.6%, R {sub wp} = 19.4%, R {sub exp} = 17.7%, S = 1.11, {chi} {sup 2} = 1.23). It is isostructural with LiM(PO{sub 3}){sub 3} (M = Fe, Cu). It contains (PO{sub 3}){sup 1-} chains with the Co atoms localized in the octahedral sites, bridging four neighboring chains. The magnetic susceptibility measurement showed a typical paramagnetic behavior of high spin of Co{sup 2+}, following the Curie-Weiss law in the temperature range of 5-300 K. Unlike the olivine type lithium cobalt phosphate, LiCoPO{sub 4}, cyclic voltammetry of LiCo(PO{sub 3}){sub 3} assembled in the coin-type cell showed no electrochemical activity in the voltage region of 1-5 V versus Li/Li{sup +}.
- OSTI ID:
- 20888100
- Journal Information:
- Materials Research Bulletin, Vol. 40, Issue 10; Other Information: DOI: 10.1016/j.materresbull.2005.05.021; PII: S0025-5408(05)00191-1; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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