Crystal structure changes of LiMn0.5Ni0.5O2 cathode materials during charge and discharge studied by synchrotron based in situ XRD

被引:112
作者
Yang, XQ [1 ]
McBreen, J
Yoon, WS
Grey, CP
机构
[1] Brookhaven Natl Lab, Upton, NY 11973 USA
[2] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA
基金
美国国家科学基金会;
关键词
lithium batteries; layered cathodes; lithium manganese nickel oxide; in situ XRD;
D O I
10.1016/S1388-2481(02)00406-X
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
The structural changes of LiMn0.5M0.5O2, used as a cathode material in a lithium half-cell, have been studied during charge-discharge using synchrotron based in situ X-ray diffraction spectroscopy. A phase transition from a hexagonal structure (H1) to another hexagonal structure (H2) was observed during a C/17 charge to 4.7 V. The new H2 unit cell has a shorter "a" axis and a longer "c" axis, as was observed in the LiNiO2 cathode material during charge. However, the second phase transition that occurs in LixNiO2 at voltages higher than 4.3 V, to a third hexagonal structure, H3, with much shorter "c" axis, was not observed. During discharge, the LixMn0.5M0.5O2 structure reversibly changed back from H2 to H1. After that, another hexagonal structure H0 with a slightly larger "a" parameter was formed following further discharging. Extended discharge at a voltage near 1 V resulted in an amorphous structure. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:649 / 654
页数:6
相关论文
共 14 条
  • [1] Local structure and first cycle redox mechanism of layered Li1.2Cr0.4Mn0.4O2 cathode material
    Ammundsen, B
    Paulsen, J
    Davidson, I
    Liu, RS
    Shen, CH
    Chen, JM
    Jang, LY
    Lee, JF
    [J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2002, 149 (04) : A431 - A436
  • [2] Synthesis of layered LiMnO2 as an electrode for rechargeable lithium batteries
    Armstrong, AR
    Bruce, PG
    [J]. NATURE, 1996, 381 (6582) : 499 - 500
  • [3] In situ X-ray diffraction and X-ray absorption studies of high-rate lithium-ion batteries
    Balasubramanian, M
    Sun, X
    Yang, XQ
    McBreen, J
    [J]. JOURNAL OF POWER SOURCES, 2001, 92 (1-2) : 1 - 8
  • [4] Structural and electrochemical analysis of layered compounds from Li2MnO3
    Johnson, CS
    Korte, SD
    Vaughey, JT
    Thackeray, MM
    Bofinger, TE
    Shao-Horn, Y
    Hackney, SA
    [J]. JOURNAL OF POWER SOURCES, 1999, 81 : 491 - 495
  • [5] JOHNSON CS, 2002, ELECTROCHEM COMMUN, V4
  • [6] Layered xLiMO2 • (1-x)Li2M′O3 electrodes for lithium batteries:: a study of 0.95LiMn0.5Ni0.5O2 • 0.05Li2TiO3
    Kim, JS
    Johnson, CS
    Thackeray, MM
    [J]. ELECTROCHEMISTRY COMMUNICATIONS, 2002, 4 (03) : 205 - 209
  • [7] Lee YS, 2001, CHEM LETT, P882
  • [8] Layered cathode materials Li[NixLi(1/3-2x/3)Mn(2/3-x/3)]O2 for lithium-ion batteries
    Lu, ZH
    MacNeil, DD
    Dahn, JR
    [J]. ELECTROCHEMICAL AND SOLID STATE LETTERS, 2001, 4 (11) : A191 - A194
  • [9] Understanding the anomalous capacity of Li/Li[NixLi(1/3-2x/3)Mn(2/3-x/3]O2 cells using in situ X-ray diffraction and electrochemical studies
    Lu, ZH
    Dahn, JR
    [J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2002, 149 (07) : A815 - A822
  • [10] Ohzuku T, 2001, CHEM LETT, P744