Effect of titanium substitution in layered LiNiO2 cathode material prepared by molten-salt synthesis

Hyung Wook Ha, Kyung Hee Jeong, Keon Kim

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

LiNi1-xTixO2 (0 ≤ x ≤ 0.1) compounds have been synthesized by a direct molten-salt method that uses a eutectic mixture of LiNO3 and LiOH salts. According to X-ray diffraction analysis, these materials have a well-developed layered structure (R3-m) and are an isostructure of LiNiO2. The LiNi1-xTixO2 (0 ≤ x ≤ 0.1) compounds have average particle sizes of 1-5 μm depending on the amount of Ti salt. Charge-discharge tests show that a LiNi1-xTixO2 (0 ≤ x ≤ 0.1) cathode prepared at 700 °C has an initial discharge capacity as high as 171 mA h g-1 and excellent capacity retention in the range 4.3-2.8 V at a current density of 0.2 mA cm-2.

Original languageEnglish
Pages (from-to)606-611
Number of pages6
JournalJournal of Power Sources
Volume161
Issue number1
DOIs
Publication statusPublished - 2006 Oct 20

Fingerprint

molten salts
Titanium
Molten materials
Cathodes
Substitution reactions
titanium
Salts
cathodes
substitutes
salts
synthesis
eutectics
current density
Eutectics
X ray diffraction analysis
Current density
Particle size
diffraction
x rays

Keywords

  • Cathode material
  • Cycling performance
  • Lithium battery
  • Lithium nickel oxide
  • Molten-salt synthesis
  • Titanium substitution

ASJC Scopus subject areas

  • Electrochemistry
  • Fuel Technology
  • Materials Chemistry
  • Energy (miscellaneous)

Cite this

Effect of titanium substitution in layered LiNiO2 cathode material prepared by molten-salt synthesis. / Ha, Hyung Wook; Jeong, Kyung Hee; Kim, Keon.

In: Journal of Power Sources, Vol. 161, No. 1, 20.10.2006, p. 606-611.

Research output: Contribution to journalArticle

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N2 - LiNi1-xTixO2 (0 ≤ x ≤ 0.1) compounds have been synthesized by a direct molten-salt method that uses a eutectic mixture of LiNO3 and LiOH salts. According to X-ray diffraction analysis, these materials have a well-developed layered structure (R3-m) and are an isostructure of LiNiO2. The LiNi1-xTixO2 (0 ≤ x ≤ 0.1) compounds have average particle sizes of 1-5 μm depending on the amount of Ti salt. Charge-discharge tests show that a LiNi1-xTixO2 (0 ≤ x ≤ 0.1) cathode prepared at 700 °C has an initial discharge capacity as high as 171 mA h g-1 and excellent capacity retention in the range 4.3-2.8 V at a current density of 0.2 mA cm-2.

AB - LiNi1-xTixO2 (0 ≤ x ≤ 0.1) compounds have been synthesized by a direct molten-salt method that uses a eutectic mixture of LiNO3 and LiOH salts. According to X-ray diffraction analysis, these materials have a well-developed layered structure (R3-m) and are an isostructure of LiNiO2. The LiNi1-xTixO2 (0 ≤ x ≤ 0.1) compounds have average particle sizes of 1-5 μm depending on the amount of Ti salt. Charge-discharge tests show that a LiNi1-xTixO2 (0 ≤ x ≤ 0.1) cathode prepared at 700 °C has an initial discharge capacity as high as 171 mA h g-1 and excellent capacity retention in the range 4.3-2.8 V at a current density of 0.2 mA cm-2.

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