Structural, chemical, and electrochemical characterization of layered Li[Li0.17Mn0.33Co0.5-yNiy]O2 cathodes

被引：24

作者：

Arunkumar, T. A. ^{[1
]}

Alvarez, E. ^{[1
]}

Manthiram, A. ^{[1
]}

机构：

[1] Univ Texas, Mat Sci & Engn Program, Austin, TX 78712 USA

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2007年 / 154卷 / 08期

关键词：

D O I：

10.1149/1.2745635

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Layered Li[Li0.17Mn0.33Co0.5-yNiy]O-2 (0 <= y <= 0.5) cathodes belonging to a solid solution series between layered Li[Li1/3Mn2/3]O-2 and LiCo1-zNizO2 were synthesized at 900 and 750 degrees C and characterized as cathode materials for lithium-ion batteries. The observed lithium content in the samples decreases with increasing Ni content due to a tendency to form Ni2+ and volatilization of lithium during synthesis. The first charge and discharge capacities decrease with increasing Ni content. For example, the first discharge capacity drops from 269 mAh/g for the y=0 sample to 194 mAh/g for the y=0.5 sample. The decrease in the discharge capacity with increasing Ni content is due to a decrease in the lithium content in the transition metal layer and a consequent decrease in the amount of oxygen lost irreversibly during the first charge as indicated by a structural and chemical characterization of the chemically delithiated samples. (c) 2007 The Electrochemical Society.

引用

页码：A770 / A775

页数：6

共 22 条

[1] Investigation of hydrogen content in chemically delithiated lithium-ion battery cathodes using prompt gamma activation analysis [J].

Aghara, SK ;

Venkatraman, S ;

Manthiram, A ;

Alvarez, E .

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, 2005, 265 (02) :321-328

[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] Soft chemistry synthesis and characterization of layered Li1-xNi1-yCoyO2-δ (0 ≤ x ≤ 1 and 0 ≤ y ≤ 1) [J].

Chebiam, RV ;

Prado, F ;

Manthiram, A .

CHEMISTRY OF MATERIALS, 2001, 13 (09) :2951-2957

[4] Proton insertion into oxide cathodes during chemical delithiation [J].

Choi, J ;

Alvarez, E ;

Arunkumar, TA ;

Manthiram, A .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2006, 9 (05) :A241-A244

[5] NiO2 obtained by electrochemical lithium deintercalation from lithium nickelate:: Structural modifications [J].

Croguennec, L ;

Pouillerie, C ;

Delmas, C .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2000, 147 (04) :1314-1321

[6] STRUCTURE AND ELECTROCHEMISTRY OF LITHIUM COBALT OXIDE SYNTHESIZED AT 400-DEGREES-C [J].

GUMMOW, RJ ;

THACKERAY, MM ;

DAVID, WIF ;

HULL, S .

MATERIALS RESEARCH BULLETIN, 1992, 27 (03) :327-337

[7] 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

[8] Layered cathode materials Li[NixLi(1/3-2x/3)Mn(2/3-x/3)]O2 for lithium-ion batteries [J].

Lu, ZH ;

MacNeil, DD ;

Dahn, JR .

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 [J].

Lu, ZH ;

Dahn, JR .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2002, 149 (07) :A815-A822

[10] Synthesis and characterization of layer structured solid solutions in the system of LiCoO2-Li2MnO3 [J].

Numata, K ;

Sakaki, C ;

Yamanaka, S .

SOLID STATE IONICS, 1999, 117 (3-4) :257-263

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