Influence of Mg doping on the performance of LiNiO2 matrix ceramic nanoparticles in high-voltage lithium-ion cells

R. Sathiyamoorthi, P. Shakkthivel, S. Ramalakshmi, Yong Gun Shul

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

Nano-crystalline LiNi1-xMgxO2 cathode material is synthesized via a novel, simple, solid-state reaction. Thermal analysis studies (TG/DTA) show the formation of crystalline oxides at 600 °C. The influence of Mg addition on the electrochemical behaviour of LiNiO2 is discussed. The morphology, nature, size and the shape of the synthesized materials are characterized by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). LiNi0.8Mg0.2O2 nanoparticles with a size of 40 nm and a uniform distribution and reduced aggregation are observed. Energy dispersive X-ray spectroscopic analysis shows the presence of magnesium in the compounds with an appropriate prepared concentration. The phase and structural characteristics of the LiNiO2 doped and undoped with Mg are revealed by X-ray diffraction spectroscopy (XRD). The addition of Mg does not alter the layered structure of the lithium nickelate. The addition of Mg in the cathode material does not affect the local ion environment, as investigated by FT-IR studies. The electrochemical properties are investigated by cyclic voltammetry (CV) and charge-discharge studies. Stable charge-discharge features have been observed for graphite/LiNi0.8Mg0.2O2 cells cycled in the potential range from 3.0 to 4.5 V and the capacity retention is significantly improved at x = 0.2 in LiNi1-xMgxO2.

Original languageEnglish
Pages (from-to)922-927
Number of pages6
JournalJournal of Power Sources
Volume171
Issue number2
DOIs
Publication statusPublished - 2007 Sep 27

Fingerprint

Lithium
high voltages
lithium
Doping (additives)
ceramics
Ions
Nanoparticles
nanoparticles
thermal analysis
Electric potential
Cathodes
matrices
cathodes
cells
Crystalline materials
ions
Spectroscopic analysis
Graphite
spectroscopic analysis
Solid state reactions

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Cite this

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title = "Influence of Mg doping on the performance of LiNiO2 matrix ceramic nanoparticles in high-voltage lithium-ion cells",
abstract = "Nano-crystalline LiNi1-xMgxO2 cathode material is synthesized via a novel, simple, solid-state reaction. Thermal analysis studies (TG/DTA) show the formation of crystalline oxides at 600 °C. The influence of Mg addition on the electrochemical behaviour of LiNiO2 is discussed. The morphology, nature, size and the shape of the synthesized materials are characterized by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). LiNi0.8Mg0.2O2 nanoparticles with a size of 40 nm and a uniform distribution and reduced aggregation are observed. Energy dispersive X-ray spectroscopic analysis shows the presence of magnesium in the compounds with an appropriate prepared concentration. The phase and structural characteristics of the LiNiO2 doped and undoped with Mg are revealed by X-ray diffraction spectroscopy (XRD). The addition of Mg does not alter the layered structure of the lithium nickelate. The addition of Mg in the cathode material does not affect the local ion environment, as investigated by FT-IR studies. The electrochemical properties are investigated by cyclic voltammetry (CV) and charge-discharge studies. Stable charge-discharge features have been observed for graphite/LiNi0.8Mg0.2O2 cells cycled in the potential range from 3.0 to 4.5 V and the capacity retention is significantly improved at x = 0.2 in LiNi1-xMgxO2.",
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Influence of Mg doping on the performance of LiNiO2 matrix ceramic nanoparticles in high-voltage lithium-ion cells. / Sathiyamoorthi, R.; Shakkthivel, P.; Ramalakshmi, S.; Shul, Yong Gun.

In: Journal of Power Sources, Vol. 171, No. 2, 27.09.2007, p. 922-927.

Research output: Contribution to journalArticle

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T1 - Influence of Mg doping on the performance of LiNiO2 matrix ceramic nanoparticles in high-voltage lithium-ion cells

AU - Sathiyamoorthi, R.

AU - Shakkthivel, P.

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AB - Nano-crystalline LiNi1-xMgxO2 cathode material is synthesized via a novel, simple, solid-state reaction. Thermal analysis studies (TG/DTA) show the formation of crystalline oxides at 600 °C. The influence of Mg addition on the electrochemical behaviour of LiNiO2 is discussed. The morphology, nature, size and the shape of the synthesized materials are characterized by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). LiNi0.8Mg0.2O2 nanoparticles with a size of 40 nm and a uniform distribution and reduced aggregation are observed. Energy dispersive X-ray spectroscopic analysis shows the presence of magnesium in the compounds with an appropriate prepared concentration. The phase and structural characteristics of the LiNiO2 doped and undoped with Mg are revealed by X-ray diffraction spectroscopy (XRD). The addition of Mg does not alter the layered structure of the lithium nickelate. The addition of Mg in the cathode material does not affect the local ion environment, as investigated by FT-IR studies. The electrochemical properties are investigated by cyclic voltammetry (CV) and charge-discharge studies. Stable charge-discharge features have been observed for graphite/LiNi0.8Mg0.2O2 cells cycled in the potential range from 3.0 to 4.5 V and the capacity retention is significantly improved at x = 0.2 in LiNi1-xMgxO2.

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