Improved electrochemical properties of Li(Ni0.7Co 0.3)O2 cathode for lithium ion batteries with controlled sintering conditions

Dae Geun Lee; Ravindra K. Gupta; Yong Soo Cho; Kwang Taek Hwang

doi:10.1007/s10800-008-9707-z

Improved electrochemical properties of Li(Ni_0.7Co _0.3)O₂ cathode for lithium ion batteries with controlled sintering conditions

Dae Geun Lee, Ravindra K. Gupta, Yong Soo Cho, Kwang Taek Hwang

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

Improved electrochemical properties of Li(Ni_0.7Co _0.3)O₂ cathode material are reported. Samples were synthesized by the co-precipitation method with various sintering conditions, namely temperature, time and atmosphere. Li(Ni_0.7Co _0.3)O₂ sintered at 850 °C for 14 h in air exhibited the lowest unit cell volume accompanied with relatively higher values of c/a and I ₁₀₃/I ₁₀₄ reflection peaks ratios. This also exhibited superior electrochemical properties, such as high charge-discharge capacity, high Coulombic efficiency, and low irreversible capacity loss. This can be attributed to improved hexagonal ordering, crystallinity and morphology. The electrochemical cell parameters were better than the reported ones, probably due to controlled sintering conditions.

Original language	English
Pages (from-to)	671-679
Number of pages	9
Journal	Journal of Applied Electrochemistry
Volume	39
Issue number	5
DOIs	https://doi.org/10.1007/s10800-008-9707-z
Publication status	Published - 2009 May

All Science Journal Classification (ASJC) codes

Chemical Engineering(all)
Electrochemistry
Materials Chemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1007/s10800-008-9707-z

Cite this

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title = "Improved electrochemical properties of Li(Ni0.7Co 0.3)O2 cathode for lithium ion batteries with controlled sintering conditions",

abstract = "Improved electrochemical properties of Li(Ni0.7Co 0.3)O2 cathode material are reported. Samples were synthesized by the co-precipitation method with various sintering conditions, namely temperature, time and atmosphere. Li(Ni0.7Co 0.3)O2 sintered at 850 °C for 14 h in air exhibited the lowest unit cell volume accompanied with relatively higher values of c/a and I 103/I 104 reflection peaks ratios. This also exhibited superior electrochemical properties, such as high charge-discharge capacity, high Coulombic efficiency, and low irreversible capacity loss. This can be attributed to improved hexagonal ordering, crystallinity and morphology. The electrochemical cell parameters were better than the reported ones, probably due to controlled sintering conditions.",

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AU - Lee, Dae Geun

AU - Gupta, Ravindra K.

AU - Cho, Yong Soo

AU - Hwang, Kwang Taek

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N2 - Improved electrochemical properties of Li(Ni0.7Co 0.3)O2 cathode material are reported. Samples were synthesized by the co-precipitation method with various sintering conditions, namely temperature, time and atmosphere. Li(Ni0.7Co 0.3)O2 sintered at 850 °C for 14 h in air exhibited the lowest unit cell volume accompanied with relatively higher values of c/a and I 103/I 104 reflection peaks ratios. This also exhibited superior electrochemical properties, such as high charge-discharge capacity, high Coulombic efficiency, and low irreversible capacity loss. This can be attributed to improved hexagonal ordering, crystallinity and morphology. The electrochemical cell parameters were better than the reported ones, probably due to controlled sintering conditions.

AB - Improved electrochemical properties of Li(Ni0.7Co 0.3)O2 cathode material are reported. Samples were synthesized by the co-precipitation method with various sintering conditions, namely temperature, time and atmosphere. Li(Ni0.7Co 0.3)O2 sintered at 850 °C for 14 h in air exhibited the lowest unit cell volume accompanied with relatively higher values of c/a and I 103/I 104 reflection peaks ratios. This also exhibited superior electrochemical properties, such as high charge-discharge capacity, high Coulombic efficiency, and low irreversible capacity loss. This can be attributed to improved hexagonal ordering, crystallinity and morphology. The electrochemical cell parameters were better than the reported ones, probably due to controlled sintering conditions.

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