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Synthesis and ionic conductivity of NASICON - structured LiTi2-xSnx (PO4)3 anode material for lithium - ion batteries

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Synthesis and ionic conductivity of NASICON - structured LiTi

2-x

Sn

x

(PO

4

)

3

anode material for lithium - ion batteries

Authors

Nedjemeddine Bounar, Abderrahim Benabbas, Patrick Ropa, Jean-Claude Carru

Publication date

2017/7/3

Journal

Advances in Materials and Processing Technologies

Volume 3 Issue 3 Pages 241-249 Publisher

Taylor & Francis

Description

Advanced Li-ion batteries with high rate properties are highly in demand and have generated much attention in the research community. Here, we present a simple solid-state reaction to synthesise NASICON-structured LiTi2 − xSnx (PO4)3 (x = 0–1.8) as anode material for lithium ion batteries. Their

structures were determined from X-ray powder diffraction using Rietveld analysis. All the compositions present the space group R-3c. The refinements show that theta and Sn cations are statistically

distributed over the same position while the Li ones are exclusively located on the M1site. The lattice constants a and c exhibit linear variation over the whole composition range. The bond lengths are in accordance with those of other NASICON structures. The SEM micrographs of the samples show relative porous microstructures. The ionic conductivity is about 10−4–10−5 (S. cm−1); for the activation energy, a typical value …

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