Publication Type:

Journal Article

Source:

Electrochimica Acta, Volume 90, p.112 - 118 (2013)

URL:

http://www.sciencedirect.com/science/article/pii/S0013468612019251

Keywords:

Li-ion batteries

Abstract:

Urea-assisted auto-combustion synthesis was used for the easy and scalable preparation of TiO2 nanoparticles for use as anodes in lithium-ion batteries. The prepared TiO2 powder was annealed at 300 °C, 400 °C, 500 °C and 600 °C to optimize the system and assess the effects of particle size on electrochemical properties. X-ray diffraction patterns confirmed that pure anatase phase TiO2 formed at up to 500 °C, above which mixed phases of anatase and rutile emerged. Field-emission transmission electron microscopy showed that spherical particles of 8–25 nm were formed. The electrochemical performances of annealed TiO2 samples were tested by charging/discharging, C-rate measurement and electrochemical impedance spectroscopy. It was clearly found that the crystal particle size has a striking impact on the Li insertion behavior and lithium storage capability. TiO2 nanoparticles electrode annealed at lower temperature 300 °C showed high rate capability, excellent capacity retention and high electrical conductivity due to its very small particles and nonideal crystal lattices.

Cite this Research Publication

Alok Kumar Rai, Tuan, A. Ly, Jihyeon, G., Vinod, M., Jungwon, K., Baboo, J. Paul, Jinju, S., and Jaekook, K., “Simple synthesis and particle size effects of TiO 2 nanoparticle anodes for rechargeable lithium ion batteries”, Electrochimica Acta, vol. 90, pp. 112 - 118, 2013.