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Issue 8, 2010
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High lithiumstorage in micrometre sized mesoporous spherical self-assembly of anatase titania nanospheres and carbon

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Abstract

Composite of anatase titania (TiO2) nanospheres and carbon grown and self-assembled into micron-sized mesoporous spheres via a solvothermal synthesis route are discussed here in the context of rechargeable lithium-ion battery. The morphology and carbon content and hence the electrochemical performance are observed to be significantly influenced by the synthesis parameters. Synthesis conditions resulting in a mesoporous arrangement of an optimized amount carbon and TiO2 exhibited the best lithium battery performance. The first discharge cycle capacity of carbon-titania mesoporous spheres (solvothermal reaction at 150 °C at 6 h, calcination at 500 °C under air, BET surface area 80 m2g−1) was 334 mAhg−1 (approximately 1 Li) at current rate of 0.066 Ag−1. High storage capacity and good cyclability is attributed to the nanostructuring of TiO2 (mesoporosity) as well as due to formation of a percolation network of carbon around the TiO2 nanoparticles. The micron-sized mesoporous spheres of carbon-titania composite nanoparticles also show good rate cyclability in the range (0.066–6.67) Ag−1.

Graphical abstract: High lithium storage in micrometre sized mesoporous spherical self-assembly of anatase titania nanospheres and carbon

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Article information


Submitted
15 Sep 2009
Accepted
24 Nov 2009
First published
06 Jan 2010

J. Mater. Chem., 2010,20, 1600-1606
Article type
Paper

High lithium storage in micrometre sized mesoporous spherical self-assembly of anatase titania nanospheres and carbon

S. K. Das, S. Darmakolla and A. J. Bhattacharyya, J. Mater. Chem., 2010, 20, 1600
DOI: 10.1039/B919139A

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