The superior lithium storage capabilities of ultra-fine rutile TiO2 nanoparticles
Chen, Jun Song
Lou, David Xiong Wen
Date of Issue2009
School of Chemical and Biomedical Engineering
The lithium storage capabilities of ultra-fine rutile TiO2 nanoparticles have been studied. Ultra-fine rutile TiO2 nanoparticles with only several nanometers in size have been prepared by a modified wet-chemical method with a high yield. Unexpectedly, the rutile TiO2 nanoparticles with 3 nm in size exhibit superior lithium storage properties. Specifically, they show long term cycling stability upon extended cycling for at least 300 cycles with a capacity loss of only 0.17% per cycle, and good rate capability up to a 30 C rate. The excellent reversible lithium storage capabilities could be attributed to the ultra-fine size giving rise to a very short diffusion path, and the relatively large surface area which provides more sites for lithium insertion.
Journal of power sources
© 2009 Elsevier B.V. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Power Sources, Elsevier B.V. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI: http://dx.doi.org/10.1016/j.jpowsour.2009.11.040].