Article ID Journal Published Year Pages File Type
1616159 Journal of Alloys and Compounds 2012 4 Pages PDF
Abstract

A carbon nano-tubes (CNTs) modified spherical Li2FeSiO4 cathode material has been synthesized by a solid-state reaction method. The as-prepared Li2FeSiO4 composite has a micro-spherical morphology and is significantly constituted of a large number of nano-spheres connected by CNTs. Charge–discharge test shows that the sample exhibits discharge capacity of 153 mAh g−1 at 0.1 C rate in the voltage range of 1.5–4.6 V. When discharging at 10 C rate, the samples demonstrate a specific discharge capacity of 78 mAh g−1. Such an enhancement of the electrochemical properties has been ascribed to a reduction of the particle size, the network-like connection with CNTs and the porous micro-spherical morphology.

► The carbon nano-tubes modified spherical Li2FeSiO4 cathode material was synthesized. ► The synthesized micro-spheres contain large amount of nano-spherical primary particles. ► The nano-spherical primary particles were connected by coated carbon and carbon nano-tubes. ► The rate performance and cyclability of the material are pretty good.

Related Topics
Physical Sciences and Engineering Materials Science Metals and Alloys
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