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Electrolyte Reactions with the Surface of High Voltage LiNi0.5Mn1.5O4 Cathodes for Lithium-Ion Batteries
被引:474
|作者:
Yang, Li
[1
]
Ravdel, Boris
[2
]
Lucht, Brett L.
[1
]
机构:
[1] Univ Rhode Isl, Dept Chem, Kingston, RI 02881 USA
[2] Lithion Inc, Pawcatuck, CT 06379 USA
关键词:
decomposition;
dissociation;
electrochemical electrodes;
electrolytes;
infrared spectra;
lithium compounds;
nickel compounds;
secondary cells;
spectrochemical analysis;
X-ray photoelectron spectra;
ELECTROCHEMICAL PERFORMANCE;
SPINEL;
INTERFACE;
CARBONATE;
D O I:
10.1149/1.3428515
中图分类号:
O646 [电化学、电解、磁化学];
学科分类号:
081704 ;
摘要:
The reaction of an electrolyte (1 M LiPF6 in ethylene carbonate/dimethyl carbonate/diethyl carbonate, 1:1:1) with the surface of LiNi0.5Mn1.5O4 at various voltages (4.0-5.3 V vs Li) was investigated. Coin cells (Li/LiNi0.5Mn1.5O4) stored at low voltage (4.0-4.5 V vs Li) show low residual current, and ex situ analysis of the LiNi0.5Mn1.5O4 surface by X-ray photoelectron spectroscopy (XPS) and IR spectroscopy suggests low concentrations of electrolyte decomposition products. Coin cells (Li/LiNi0.5Mn1.5O4) stored at high voltage (4.7-5.3 V vs Li) show increased residual current, and ex situ analysis of the cathode surface by XPS and IR supports the presence of poly(ethylenecarbonate). (C) 2010 The Electrochemical Society. [DOI: 10.1149/1.3428515] All rights reserved.
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页码:A95 / A97
页数:3
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