Co0.5TiOPO4: Crystal structure, magnetic and electrochemical properties

被引：28

作者：

Essehli, Rachid ^{[1
,2
]}

El Bali, Brahim ^{[1
]}

Ehrenberg, Helmut ^{[2
,3
]}

Svoboda, Ingrid ^{[2
]}

Bramnik, Natalia ^{[2
]}

Fuess, Hartmut ^{[2
]}

机构：

[1] Univ Mohammed 1, Fac Sci, Dept Chem, Lab Mineral Solid & Analyt Chem LMSAC, Oujda 60000, Morocco

[2] Tech Univ Darmstadt, D-64287 Darmstadt, Germany

[3] Leibniz Inst Solid State & Mat Res Dresden IFW, D-01069 Dresden, Germany

来源：

MATERIALS RESEARCH BULLETIN | 2009年 / 44卷 / 04期

关键词：

Crystal structure; IR-spectroscopy; TITANIUM PHOSPHATES; NATI2(PO4)3; BICOPO5;

D O I：

10.1016/j.materresbull.2008.09.027

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The new titanium oxyphosphate Co0.5TiPO5 has been prepared by solid state reaction. Its structure has been determined by single crystal X-ray diffraction and was further investigated by FT-IR spectroscopy and magnetic measurements. The compound crystallizes in the monoclinic system, S.G: P2(1)/c [a=7.358(1)angstrom, b=7.378(2)angstrom, c=7.383(3)angstrom, beta=19.66(3)degrees, Z=4, R-1=0.0142, wR(2)=0.0429]. The structure can be described as a network of very distorted TiO6 octahedra, in which the Ti4+ ions are displaced from the centres of the octahedra, and slightly distorted PO4 tetrahedra. Half of the octahedral cavities are occupied by Co atoms. The other half of octahedral sites is vacant and favourable for the electrochemical insertion of lithium. The insertion of lithium was studied by galvanostatic charging and discharging between different voltage limits. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：817 / 821

页数：5

共 28 条

[1] Structural and lithium intercalation studies of Mn(0.5-x)CaxTi2(PO4)3 phases (0≤x≤0.50) [J].