TiCl4 Korean Source Li4Ti5O12 Korean Source

Translated title of the contribution: Electrochemical properties of lithium secondary battery and the synthesis of spherical Li4Ti5O12 powder by using TiCl4 as a starting material

Byung Hyun Choi, Mi Jung Ji, Yong Jin Kwon, Eun Kyung Kim, Sahn Nahm

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

One of the greatest challenges for our society is providing powerful electrochemical energy conversion and storage devices. Rechargeable lithium-ion batteries and fuel cells are among the most promising candidates in terms of energy and power density. As the starting material, TiCl4·YCl3 solution and dispersing agent (HCP) were mixed and synthesized using ammonia as the precipitation agent, in order to prepare the nano size Y doped spherical TiO2 precursor. Then, the Li4Ti5O12 was synthesized using solid state reaction method through the stoichiometric mixture of Y doped spherical TiO2 precursor and LiOH. The Ti mole increased the concentration of the spherical particle size due to the addition of HPC with a similar particle size distribution in a well in which Li4Ti5O12 spherical particles could be obtained. The optimal synthesis conditions and the molar ratio of the Ti 0.05 mol reaction at 50°C for 30 minutes and at 850°C for 6 hours heat treatment time were optimized. Li4Ti5O12 was prepared by the above conditions as a working electrode after generating the Coin cell; then, electrochemical properties were evaluated when the voltage range of 1.5V was flat, the initial capacity was 141 mAh/g, and cycle retention rate was 86%; also, redox reactions between 1.5 and 1.7V, which arose from the insertion and deintercalation of 0.005 mole of Y doping is not a case of doping because the C-rate characteristics were significantly better.

Original languageKorean
Pages (from-to)669-675
Number of pages7
JournalKorean Journal of Materials Research
Volume20
Issue number12
DOIs
Publication statusPublished - 2010 Dec 1

Fingerprint

Secondary batteries
Electrochemical properties
Lithium
Powders
Doping (additives)
Redox reactions
Solid state reactions
Energy conversion
Ammonia
Particle size analysis
Energy storage
Fuel cells
Particle size
Heat treatment
Electrodes
Electric potential
titanium tetrachloride
Lithium-ion batteries

Keywords

  • Anode material
  • Lithium ion battery
  • Spherical LiTiO1
  • Ticl
  • Yitria doping

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

TiCl4 Korean Source Li4Ti5O12 Korean Source. / Choi, Byung Hyun; Ji, Mi Jung; Kwon, Yong Jin; Kim, Eun Kyung; Nahm, Sahn.

In: Korean Journal of Materials Research, Vol. 20, No. 12, 01.12.2010, p. 669-675.

Research output: Contribution to journalArticle

Choi, Byung Hyun ; Ji, Mi Jung ; Kwon, Yong Jin ; Kim, Eun Kyung ; Nahm, Sahn. / TiCl4 Korean Source Li4Ti5O12 Korean Source. In: Korean Journal of Materials Research. 2010 ; Vol. 20, No. 12. pp. 669-675.
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