Issue 8, 2013
From the journal:

Journal of Materials Chemistry A

Continuous activation of Li2MnO3 component upon cycling in Li1.167Ni0.233Co0.100Mn0.467Mo0.033O2 cathode material for lithium ion batteries†

Seung-Ho Yu,a   Taeho Yoon,b   Junyoung Mun,c   Sangjin Park,d   Yoon-Sok Kang,c   Jin-Hwan Park,c   Seung M. Oh*b  and  Yung-Eun Sung*a  

* Corresponding authors

a Center for Nanoparticle Research, Institute for Basic Science (IBS), and School of Chemical Biological Engineering, Seoul National University, Seoul 151-744, Korea
E-mail: ysung@snu.ac.kr

b World Class University (WCU) program of Chemical Convergence for Energy & Environment (C2E2), School of Chemical and Biological Engineering, Seoul National University (SNU), Seoul 151-744, Korea
E-mail: seungoh@snu.ac.kr

c Battery Group, Energy Lab, SAIT (Samsung Advanced Institute of Technology), Yongin, Korea

d Advanced Development Team, Samsung SDI Co., Ltd., Cheonan, Chungcheongnam-do, Korea

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, Li1.167Ni0.233Co0.100Mn0.467Mo0.033O2 is prepared by a co-precipitation method. In this report, we focus on anomalous changes upon cycling in Li1.167Ni0.233Co0.100Mn0.467Mo0.033O2 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 Li1.167Ni0.233Co0.100Mn0.467Mo0.033O2 cathode material below 4.4 V is discussed. Furthermore, cycle performance is improved by reassembling Li1.167Ni0.233Co0.100Mn0.467Mo0.033O2 into another cell after washing.

Graphical abstract: Continuous activation of Li2MnO3 component upon cycling in Li1.167Ni0.233Co0.100Mn0.467Mo0.033O2 cathode material for lithium ion batteries

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Article information

DOI
https://doi.org/10.1039/C2TA00309K
Article type
Paper
Submitted
14 Sep 2012
Accepted
20 Dec 2012
First published
20 Dec 2012

J. Mater. Chem. A, 2013,1, 2833-2839

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Continuous activation of Li2MnO3 component upon cycling in Li1.167Ni0.233Co0.100Mn0.467Mo0.033O2 cathode material for lithium ion batteries

S. Yu, T. Yoon, J. Mun, S. Park, Y. Kang, J. Park, S. M. Oh and Y. Sung, J. Mater. Chem. A, 2013, 1, 2833 DOI: 10.1039/C2TA00309K

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