Facile synthesis and electrochemical characterization of porous and dense TiO2 nanospheres for lithium-ion battery applications

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Hong-En Wang
  • Hua Cheng
  • Chaoping Liu
  • Xue Chen
  • Qinglai Jiang
  • Zhouguang Lu
  • Ludvik Martinu
  • Igor Bello

Detail(s)

Original languageEnglish
Pages (from-to)6394-6399
Journal / PublicationJournal of Power Sources
Volume196
Issue number15
Publication statusPublished - 1 Aug 2011

Abstract

We present a two-step method to optimize the nanoporous characteristics of TiO2 samples thus enabling a higher charge and discharge capacity and a larger rate capability compared to dense TiO2 materials. We use a simple sol-gel process to fabricate spherical titanium glycolates precursors followed by subsequent hydrothermal or annealing treatments resulting, respectively, in highly porous or dense TiO2 nanospheres. These processes enable control of the grain size, pore structure, and specific surface area of the TiO2. The fabricated TiO2 nanostructures have been subsequently used to assemble lithium-ion batteries. Galvanostatic discharge-charge tests indicate that the porous TiO2 nanospheres possess high and stable reversible capacity of 229, 133, and 56 mAh g -1 at 0.06, 0.6 and 6 C, respectively; whereas the corresponding values for dense TiO2 nanospheres are 217, 45, and ∼1 mAh g -1. Such considerable improvement of the electrochemical activity is attributed to the porous TiO2 nanostructures, and subsequent change in diffusion length, and enables the possibility to optimize the high rate capability in TiO2-based lithium-ion batteries. © 2011 Elsevier B.V. All rights reserved.

Research Area(s)

  • Lithium-ion battery, Nanoporous material, Nanosphere, Titanium dioxide

Citation Format(s)

Facile synthesis and electrochemical characterization of porous and dense TiO2 nanospheres for lithium-ion battery applications. / Wang, Hong-En; Cheng, Hua; Liu, Chaoping; Chen, Xue; Jiang, Qinglai; Lu, Zhouguang; Li, Yang Yang; Chung, C. Y.; Zhang, Wenjun; Zapien, Juan Antonio; Martinu, Ludvik; Bello, Igor.

In: Journal of Power Sources, Vol. 196, No. 15, 01.08.2011, p. 6394-6399.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review