Continuous activation of Li2MnO3 component upon cycling in Li1.167Ni0.233Co0.100Mn 0.467Mo0.033O2 cathode material for lithium ion batteries

Seung Ho Yu; Taeho Yoon; Junyoung Mun; Sangjin Park; Yoon Sok Kang; Jin Hwan Park; Seung M. Oh; Yung Eun Sung

doi:10.1039/c2ta00309k

Continuous activation of Li₂MnO₃ component upon cycling in Li_1.167Ni_0.233Co_0.100Mn _0.467Mo_0.033O₂ cathode material for lithium ion batteries

Seung Ho Yu, Taeho Yoon, Junyoung Mun, Sangjin Park, Yoon Sok Kang, Jin Hwan Park, Seung M. Oh, Yung Eun Sung

Research output: Contribution to journal › Article

95 Citations (Scopus)

Abstract

Li-rich layered cathode materials are very promising candidates for next generation high energy lithium ion batteries. One of the Li-rich layered cathode materials, Li_1.167Ni_0.233Co_0.100Mn _0.467Mo_0.033O₂ is prepared by a co-precipitation method. In this report, we focus on anomalous changes upon cycling in Li_1.167Ni_0.233Co_0.100Mn _0.467Mo_0.033O₂ cathode material in a voltage range of 2.0-4.55 V at room temperature. The structural transitions upon cycling are analyzed by ex situ X-ray diffraction. In addition, the changes in local structure during cycling are studied by X-ray absorption near edge structure. With differential capacity plots by controlling the cut-off voltage, the voltage decay during cycling is intensively studied. The continuous activation process of the residual Li₂MnO₃ component during cycling is correlated with voltage decay during cycling, and increasing capacity during the initial several cycles. Also, the electrochemical performance in Li _1.167Ni_0.233Co_0.100Mn_0.467Mo _0.033O₂ cathode material below 4.4 V is discussed. Furthermore, cycle performance is improved by reassembling Li _1.167Ni_0.233Co_0.100Mn_0.467Mo _0.033O₂ into another cell after washing.

Original language	English
Pages (from-to)	2833-2839
Number of pages	7
Journal	Journal of Materials Chemistry A
Volume	1
Issue number	8
DOIs	https://doi.org/10.1039/c2ta00309k
Publication status	Published - 2013 Feb 28
Externally published	Yes

ASJC Scopus subject areas

Chemistry(all)
Renewable Energy, Sustainability and the Environment
Materials Science(all)

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Yu, S. H., Yoon, T., Mun, J., Park, S., Kang, Y. S., Park, J. H., Oh, S. M., & Sung, Y. E. (2013). Continuous activation of Li₂MnO₃ component upon cycling in Li_1.167Ni_0.233Co_0.100Mn _0.467Mo_0.033O₂ cathode material for lithium ion batteries. Journal of Materials Chemistry A, 1(8), 2833-2839. https://doi.org/10.1039/c2ta00309k

Continuous activation of Li₂MnO₃ component upon cycling in Li_1.167Ni_0.233Co_0.100Mn _0.467Mo_0.033O₂ cathode material for lithium ion batteries. / Yu, Seung Ho; Yoon, Taeho; Mun, Junyoung; Park, Sangjin; Kang, Yoon Sok; Park, Jin Hwan; Oh, Seung M.; Sung, Yung Eun.

In: Journal of Materials Chemistry A, Vol. 1, No. 8, 28.02.2013, p. 2833-2839.

Research output: Contribution to journal › Article

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abstract = "Li-rich layered cathode materials are very promising candidates for next generation high energy lithium ion batteries. One of the Li-rich layered cathode materials, Li1.167Ni0.233Co0.100Mn 0.467Mo0.033O2 is prepared by a co-precipitation method. In this report, we focus on anomalous changes upon cycling in Li1.167Ni0.233Co0.100Mn 0.467Mo0.033O2 cathode material in a voltage range of 2.0-4.55 V at room temperature. The structural transitions upon cycling are analyzed by ex situ X-ray diffraction. In addition, the changes in local structure during cycling are studied by X-ray absorption near edge structure. With differential capacity plots by controlling the cut-off voltage, the voltage decay during cycling is intensively studied. The continuous activation process of the residual Li2MnO3 component during cycling is correlated with voltage decay during cycling, and increasing capacity during the initial several cycles. Also, the electrochemical performance in Li 1.167Ni0.233Co0.100Mn0.467Mo 0.033O2 cathode material below 4.4 V is discussed. Furthermore, cycle performance is improved by reassembling Li 1.167Ni0.233Co0.100Mn0.467Mo 0.033O2 into another cell after washing.",

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