Carbon-coated high capacity layered Li[Li0.2Mn0.54Ni0.13Co0.13]O2 cathodes

被引：205

作者：

Liu, Jun

Wang, Qiongyu

Reeja-Jayan, B.

Manthiram, Arumugam ^{[1
]}

机构：

[1] Univ Texas Austin, Electrochem Energy Lab, Austin, TX 78712 USA

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2010年 / 12卷 / 06期

基金：

美国国家科学基金会;

关键词：

Lithium-ion batteries; Layered oxide cathode; Carbon coating; Electrochemical performance; ELECTROCHEMICAL PROPERTIES; PERFORMANCE; STABILITY; LIFEPO4;

D O I：

10.1016/j.elecom.2010.03.024

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Electrodes fabricated with the layered Li[Li0.2Mn0.54Ni0.13Co0.13]O-2 have been coated with carbon by a thermal evaporation process and characterized. The carbon coating enhances the sample surface conductivity by 40% without degrading the layered oxide. The carbon-coated cathodes exhibit much improved rate capability and cycling performance than the bare cathode. Electrochemical impedance spectroscopy (EIS) data reveal that the improved electrochemical performances of the carbon-coated sample are due to the suppression of the solid-electrolyte interfacial (SEI) layer and faster kinetics of both the lithium-ion diffusion through surface layer and the charge transfer reaction. (C) 2010 Elsevier B.V. All rights reserved.

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页码：750 / 753

页数：4

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共 23 条

[1] Factors influencing the irreversible oxygen loss and reversible capacity in layered Li[Li1/3Mn2/3]O2-Li[M]O2 (M=Mn0.5-yNi0.5-yCo2y and Ni1-yCoy) solid solutions [J].

Arinkumar, T. A. ;

Wu, Y. ;

Manthiram, A. .

CHEMISTRY OF MATERIALS, 2007, 19 (12) :3067-3073

[2] Demonstrating oxygen loss and associated structural reorganization in the lithium battery cathode Li[Ni0.2Li0.2Mn0.6]O2 [J].

Armstrong, A. Robert ;

Holzapfel, Michael ;

Novak, Petr ;

Johnson, Christopher S. ;

Kang, Sun-Ho ;

Thackeray, Michael M. ;

Bruce, Peter G. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (26) :8694-8698

[3] A novel fabrication technique for producing dense Li[NixLi(1/3-2x/3)Mn(2/3-x/3)]O2, 0 ≤ x ≤ 1/2 [J].

Barkhouse, DAR ;

Dahn, JR .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2005, 152 (04) :A746-A751

[4] Reducing carbon in LiFePO4/C composite electrodes to maximize specific energy, volumetric energy, and tap density [J].

Chen, ZH ;

Dahn, JR .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2002, 149 (09) :A1184-A1189

[5] Challenges for Rechargeable Li Batteries [J].

Goodenough, John B. ;

Kim, Youngsik .

CHEMISTRY OF MATERIALS, 2010, 22 (03) :587-603

[6] Superior electrode performance of nanostructured mesoporous TiO2 (anatase) through efficient hierarchical mixed conducting networks [J].

Guo, Yu-Guo ;

Hu, Yong-Sheng ;

Sigle, Wilfried ;

Maier, Joachim .

ADVANCED MATERIALS, 2007, 19 (16) :2087-+

[7] Improved electrode performance of porous LiFePO4 using RuO2 as an oxidic nanoscale interconnect [J].

Hu, Yong-Sheng ;

Guo, Yu-Guo ;

Dominko, Robert ;

Gaberscek, Miran ;

Jamnik, Janko ;

Maier, Joachim .

ADVANCED MATERIALS, 2007, 19 (15) :1963-+

[8] Approaching theoretical capacity of LiFePO4 at room temperature at high rates [J].

Huang, H ;

Yin, SC ;

Nazar, LF .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2001, 4 (10) :A170-A172

[9] Structure, electrochemical properties, and thermal stability studies of cathode materials in the xLi[Mn1/2Ni1/2]O2•yLiCoO2•zLi[Li1/3Mn2/3]O2 pseudoternary system, (x+y+z=1) [J].

Jiang, J ;

Eberman, KW ;

Krause, LJ ;

Dahn, JR .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2005, 152 (09) :A1879-A1889

[10] Electrochemical and ex situ X-ray study of Li-(Li0.2Ni0.2Mn0.6)O2 cathode material for Li secondary batteries [J].

Kang, SH ;

Sun, YK ;

Amine, K .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2003, 6 (09) :A183-A186