Defects in Li4Ti5O12 induced by carbon deposition: An analysis of unidentified bands in Raman spectra

Dmitry V. Pelegov, Ralph Nicolai Nasara, Chia Hao Tu, Shih Kang Lin

Research output: Contribution to journalArticle

Abstract

Lithium titanate (Li4Ti5O12, LTO) has already occupied its niche as an anode material for high-power and long-lifespan lithium batteries, but some novel directions for basic and applied research are still open. One of the most promising approaches in improving its properties, e.g., electronic conductivity and rate capability, is based on controllable defect engineering. The "defects" may be intentionally introduced into LTO via doping, surface modifications, and the synergy between them. However, the defects, which have significant effects to the electrical and electrochemical properties, are usually extremely dilute. Reliable material characterizations are essential and challenging, but the instrumental tools for revealing dilute defects are still insufficient. Herein, detailed analyses on the surface or subsurface defects of carbon-coated LTO were performed using various material characterization methods. Raman spectroscopy has been identified as a unique tool for the probing of structural defects.

Original languageEnglish
Pages (from-to)20757-20763
Number of pages7
JournalPhysical Chemistry Chemical Physics
Volume21
Issue number37
DOIs
Publication statusPublished - 2019 Jan 1

Fingerprint

Raman scattering
Carbon
Raman spectra
Defects
carbon
defects
Lithium batteries
lithium batteries
surface defects
Electrochemical properties
Lithium
Electronic properties
Surface treatment
Raman spectroscopy
Anodes
Electric properties
anodes
lithium
electrical properties
Doping (additives)

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Pelegov, Dmitry V. ; Nasara, Ralph Nicolai ; Tu, Chia Hao ; Lin, Shih Kang. / Defects in Li4Ti5O12 induced by carbon deposition : An analysis of unidentified bands in Raman spectra. In: Physical Chemistry Chemical Physics. 2019 ; Vol. 21, No. 37. pp. 20757-20763.
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Defects in Li4Ti5O12 induced by carbon deposition : An analysis of unidentified bands in Raman spectra. / Pelegov, Dmitry V.; Nasara, Ralph Nicolai; Tu, Chia Hao; Lin, Shih Kang.

In: Physical Chemistry Chemical Physics, Vol. 21, No. 37, 01.01.2019, p. 20757-20763.

Research output: Contribution to journalArticle

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