TY - JOUR
T1 - Synthesis, crystal structure and magnetic properties of a new lithium cobalt metaphosphate, LiCo(PO3)3
AU - Choi, Seungdon
AU - Hong, Seung Tae
PY - 2005/10/6
Y1 - 2005/10/6
N2 - A new lithium cobalt metaphosphate, LiCo(PO3)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 (P212 121, a = 8.5398(2) Å, b = 8.6326(2) Å and c = 8.3520(2) Å, Z = 4, Rp = 13.6%, Rwp = 19.4%, R exp = 17.7%, S = 1.11, χ2 = 1.23). It is isostructural with LiM(PO3)3 (M = Fe, Cu). It contains (PO 3)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 Co2+, following the Curie-Weiss law in the temperature range of 5-300 K. Unlike the olivine type lithium cobalt phosphate, LiCoPO4, cyclic voltammetry of LiCo(PO3)3 assembled in the coin-type cell showed no electrochemical activity in the voltage region of 1-5 V versus Li/Li +.
AB - A new lithium cobalt metaphosphate, LiCo(PO3)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 (P212 121, a = 8.5398(2) Å, b = 8.6326(2) Å and c = 8.3520(2) Å, Z = 4, Rp = 13.6%, Rwp = 19.4%, R exp = 17.7%, S = 1.11, χ2 = 1.23). It is isostructural with LiM(PO3)3 (M = Fe, Cu). It contains (PO 3)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 Co2+, following the Curie-Weiss law in the temperature range of 5-300 K. Unlike the olivine type lithium cobalt phosphate, LiCoPO4, cyclic voltammetry of LiCo(PO3)3 assembled in the coin-type cell showed no electrochemical activity in the voltage region of 1-5 V versus Li/Li +.
KW - A. Oxides
KW - B. Chemical synthesis
KW - C. X-ray diffraction
KW - D. Crystal structure
KW - D. Magnetic properties
UR - http://www.scopus.com/inward/record.url?scp=24344451199&partnerID=8YFLogxK
U2 - 10.1016/j.materresbull.2005.05.021
DO - 10.1016/j.materresbull.2005.05.021
M3 - Article
AN - SCOPUS:24344451199
SN - 0025-5408
VL - 40
SP - 1787
EP - 1795
JO - Materials Research Bulletin
JF - Materials Research Bulletin
IS - 10
ER -