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Issue 37, 2009
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Synthesis and electrochemical performance of nano-sized Li4Ti5O12 with double surface modification of Ti(III) and carbon

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Abstract

Spinel Li4Ti5O12 nano-particles with double conductive surface modification of Ti(III) and carbon were synthesized by a facile solid-state reaction, in which the polyaniline (PANI) coated TiO2 particles and a lithium salt were used as precursors. On heat treatment under an argon atmosphere containing 5% H2, the carbonization of PANI effectively restricted the particle-size growth of Li4Ti5O12 and reduced the surface Ti(IV) into Ti(III). The surface modification combined with tailored particle size can improve the surface conductivity and shorten the Li-ion diffusion path. Furthermore, both the Ti(III) surface modification and the tailored particles (50–70nm) have the potential to increase the solid solution (single-phase insertion/extraction) during the electrochemical process. Electrochemical analysis indicated that the presence of the solid solution is beneficial for Li-ion mobility. Thereby, the prepared Li4Ti5O12 displays high power performance.

Graphical abstract: Synthesis and electrochemical performance of nano-sized Li4Ti5O12 with double surface modification of Ti(III) and carbon

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Publication details

The article was received on 21 Apr 2009, accepted on 24 Jun 2009 and first published on 24 Jul 2009


Article type: Paper
DOI: 10.1039/B908025B
J. Mater. Chem., 2009,19, 6789-6795

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    Synthesis and electrochemical performance of nano-sized Li4Ti5O12 with double surface modification of Ti(III) and carbon

    Y. Wang, H. Liu, K. Wang, H. Eiji, Y. Wang and H. Zhou, J. Mater. Chem., 2009, 19, 6789
    DOI: 10.1039/B908025B

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