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2 Materials Science Poland

2 2006

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The effect of aluminium on the electrical and electrochemical properties of phospho-olivine - a cathode material for Li-ion batteries

Zając W., Marzec J., Molenda J.

Materials Science Poland

2006

Vol. 24, No. 1

123--131

The structure, electrical and electrochemical properties of phospho-olivine (LiFePO4) doped with aluminium were investigated. Some of the obtained samples had much higher electrical conductivities than the undoped material (10-4 S/cm compared to 10-10 S/cm). It has been stated that the enhanced conductivity is caused by a thin layer of reduced material that has metallic properties (probably iron phosphide), formed on the grain surfaces of phospho-olivine.

Lithium-ion batteries - state of art. Novel phospho-olivine cathode materials

Molenda J.

Materials Science Poland

2006

Vol. 24, No. 1

61--67

This work is a brief review of physicochemical properties of modern cathode materials for Li-ion batteries. These intercalated transition metal compounds of layered, spinel or olivine-type structure exhibit a correlation between their microscopic electronic properties and the efficiency and mechanism of lithium intercalation. The recently reported metallic-type conductivity of doped phospho-olivine LiFePO4, being a novel promising cathode material, is discussed in more detail, and some fundamental arguments are presented against the bulk nature of the observed high electronic conductivi