Structure characterization and electrochemical characteristics of carbon nanotube-spinel Li4Ti5O12 nanoparticles

Xiangcheng Sun, A. Iqbal, I. D. Hosein, M. J. Yacaman, Z. Y. Tang, P. V. Radovanovic, B. Cui

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Carbon nanotube-spinel lithium titanate (CNT-Li4Ti 5O12) nanoparticles have been synthesized by hydrothermal reaction and higher-temperature calcinations with LiOH-H2O and TiO2 precursors in the presence of carbon nanotubes sources. The CNT-Li4Ti5O12 nanoparticles have been characterized by X-ray diffraction (XRD), high angle annular dark field (HAADF) images, and selected area electron diffraction (SAED). The particles exhibited a spinel cubic crystal phase and homogenous size distribution, with sizes around 50-70 nm. HAADF imaging confirmed that carbon content exists on the surface of the CNT-Li4Ti5O12 nanoparticles with graphitic carbon coating of 3-5 nm thickness under 800°C in the Ar gas. The graphitic carbon phase was further confirmed with Raman spectroscopy analysis on powder samples. Electrochemical characteristics were evaluated with galvanostatic discharge/charge tests, which showed that the initial discharge capacity is 172 mA-h/g at 0.1C. The nanoscale carbon layers uniformly coated the particles, and the interconnected carbon nanotube network is responsible for the improved charge rate capability and conductivity.

Original languageEnglish (US)
Title of host publicationNext-Generation Energy Storage Materials and Systems
Pages67-72
Number of pages6
DOIs
StatePublished - Dec 1 2012
Externally publishedYes
Event2012 MRS Spring Meeting - San Francisco, CA, United States
Duration: Apr 9 2012Apr 13 2012

Publication series

NameMaterials Research Society Symposium Proceedings
Volume1440
ISSN (Print)0272-9172

Other

Other2012 MRS Spring Meeting
CountryUnited States
CitySan Francisco, CA
Period4/9/124/13/12

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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