Li+-Ion Extraction/Insertion of Ni-Rich Li1+x(NiyCozMnz)wO2 (0.005 < x < 0.03; y:z=8:1, w ≈ 1) Electrodes: In Situ XRD and Raman Spectroscopy Study

被引：129

作者：

Ghanty, Chandan ^{[1
]}

Markovsky, Boris ^{[1
]}

Erickson, Evan M. ^{[1
]}

Talianker, Michael ^{[2
]}

Haik, Ortal ^{[1
]}

Tal-Yossef, Yosef ^{[1
]}

Mor, Albert ^{[1
]}

Aurbach, Doron ^{[1
]}

Lampert, Jordan ^{[3
]}

Volkov, Aleksei ^{[3
]}

Shin, Ji-Yong ^{[3
]}

Garsuch, Arnd ^{[3
]}

Chesneau, Frederick Francois ^{[3
]}

Erk, Christoph ^{[3
]}

机构：

[1] Bar Ilan Univ, Dept Chem, IL-52900 Ramat Gan, Israel

[2] Ben Gurion Univ Negev, Dept Mat Engn, IL-84105 Beer Sheva, Israel

[3] GCN E, BASF SE, D-67056 Ludwigshafen, Germany

来源：

CHEMELECTROCHEM | 2015年 / 2卷 / 10期

关键词：

in situ studies; Li+ extraction/insertion; Ni-rich cathodes; Raman spectroscopy; X-ray diffraction; LINI0.8CO0.1MN0.1O2 CATHODE MATERIALS; CRYSTAL-STRUCTURE CHANGES; RAY-DIFFRACTION; ELECTROCHEMICAL PROPERTIES; EX-SITU; LINI0.5CO0.2MN0.3O2; CATHODE; LITHIUM BATTERIES; CHARGE; LINI0.8CO0.15AL0.05O2; PERFORMANCE;

D O I：

10.1002/celc.201500160

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We present the results of our in situ X-ray diffraction (XRD) and Raman spectroscopy measurements for the first Li-ion extraction/insertion (charge/discharge) processes of nickel-rich Li1+x(NiyCozMnz)(w)O-2 (0.005 < x < 0.03; y:z = 8:1, w is nearly 1) electrodes in Li cells. These cells were of a special design that provide in situ (at-work) measurements during electrochemical polarization and can be used for regular cycling tests of practical Li-battery electrodes. By using XRD measurements, it was established that, upon Li+ extraction, these cathode materials demonstrate structural transformations of the hexagonal phase (space group R-3m) H1 to another hexagonal phase H2 (with a lower Li-ion content in the lattice) and to domains comprising both of these two phases, coexisting at potentials E approximate to 4.2-4.3V. The above phases differ by the a and c lattice constants, which is in agreement with literature results. Evolution of the lattice constants with the electrode potential upon charge/discharge is shown to be in correlation with the differential capacity dQ/dE versus E plots and with some Raman parameters calculated from complementary in situ studies of these cathode materials by Raman spectroscopy.

引用

页码：1479 / 1486

页数：8

共 36 条

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