Electrochemical characterizations of commercial LiCoO2 powders with surface modified by Li3PO4 nanoparticles

被引：49

作者：

Jin, Y ^{[1
]}

Li, N

Chen, CH

Wei, SQ

机构：

[1] Univ Sci & Technol China, Dept Mat Sci & Engn, Anhua 230026, Peoples R China

[2] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Anhua 230026, Peoples R China

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2006年 / 9卷 / 06期

关键词：

D O I：

10.1149/1.2188081

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Through a simple mechanical mixing and heating treatment, the surface of commercial LiCoO2 particles was modified by forming a phosphorus-containing surface layer. X-ray diffraction results proved that no second crystalline phase was present after modification. X-ray absorption near edge structure showed that the valence of Co ions decreased with increased heat-treatment temperature. A higher 3.6 V plateau efficiency was observed for the modified powders. Between 2.8 and 4.5 V, the modified powders showed significantly better capacity retention than pristine LiCoO2. After heat-treatment at the optimal temperature of 450 degrees C, the modified LiCoO2 can deliver a reversible 1 C-rate capacity of 164 mAh/g after 50 cycles.

引用

页码：A273 / A276

页数：4

共 19 条

[1] LiAlO2-coated LiCoO2 as cathode material for lithium ion batteries [J].

Cao, H ;

Xia, BJ ;

Zhang, Y ;

Xu, NX .

SOLID STATE IONICS, 2005, 176 (9-10) :911-914

[2] Methods to obtain excellent capacity retention in LiCoO2 cycled to 4.5 V [J].

Chen, ZH ;

Dahn, JR .

ELECTROCHIMICA ACTA, 2004, 49 (07) :1079-1090

[3]

Cho J, 2000, ELECTROCHEM SOLID ST, V3, P362

[4]

Cho J, 2001, ANGEW CHEM INT EDIT, V40, P3367, DOI 10.1002/1521-3773(20010917)40:18<3367::AID-ANIE3367>3.0.CO

[5]

2-A

[6] Novel LiCoO2 cathode material with Al2O3 coating for a Li ion cell [J].

Cho, J ;

Kim, YJ ;

Park, B .

CHEMISTRY OF MATERIALS, 2000, 12 (12) :3788-3791

[7]

Deepa S, 1999, B ELECTROCHEM, V15, P381

[8] A simple mechano-thermal coating process for improved lithium battery cathode materials [J].

Fey, GTK ;

Yang, HZ ;

Kumar, TP ;

Naik, SP ;

Chiang, AST ;

Lee, DC ;

Lin, JR .

JOURNAL OF POWER SOURCES, 2004, 132 (1-2) :172-180

[9] Vibrational spectroscopic and electrochemical studies of the low and high temperature phases of LiCo(1-x)M(x)O(2) (M=Ni or Ti) [J].

Huang, WW ;

Frech, R .

SOLID STATE IONICS, 1996, 86-8 :395-400

[10] Electrochemical and in situ synchrotron XRD studies on Al2O3-coated LiCoO2 cathode material [J].

Liu, LJ ;

Chen, LQ ;

Huang, XJ ;

Yang, XQ ;

Yoon, WS ;

Lee, HS ;

McBreen, J .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2004, 151 (09) :A1344-A1351

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