Electrical and electrochemical behaviour of several LiFe<Subscript><Emphasis Type="Italic">x</Emphasis></Subscript>Co<Subscript>1 − <Emphasis Type="Italic">x</Emphasis></Subscript>PO<Subscript>4</Subscript> solid solutions as cathode materials for lithium ion batteries期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Electrical and electrochemical behaviour of several LiFexCo1 − xPO4 solid solutions as cathode materials for lithium ion batteries

Authors:	R. Ruffo C. M. Mari F. Morazzoni F. Rosciano R. Scotti

Affiliation:	(1) Dipartimento di Scienza dei Materiali, Università degli Studi di Milano—Bicocca, Via R. Cozzi 53, 20126 Milan, Italy;(2) Electrochemistry Laboratory, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland

Abstract:	Several olivine phosphates were investigated in the last years as cathode materials for secondary lithium ion batteries. Among these compounds, LiFe_xCo_1 − xPO₄ solid solutions might be interesting candidates because they should combine the high potential value of Co³⁺/Co²⁺ (higher than 4.5 V vs Li⁺/Li) with the relatively high charge–discharge rate of LiFePO₄. Solid solutions were prepared by solid-state route and characterised by X-ray powder diffraction, cyclic voltammetry, impedance spectroscopy and the Hebb–Wagner method. The results show that also low amount of iron induces high electronic conductivity in the solid solutions.

Keywords:	Lithium iron phosphate Lithium Cobalt phosphate Olivine phase Cathode materials Lithium ion batteries
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