Electrochemical performance and low discharge cut-off voltage behavior of ruthenium doped Li4Ti5O12 with improved energy density

被引：77

作者：

Jhan, Yi-Ruei ^{[1
]}

Duh, Jenq-Gong ^{[1
]}

机构：

[1] Natl Tsing Hua Univ, Dept Mat Sci & Engn, Hsinchu, Taiwan

来源：

ELECTROCHIMICA ACTA | 2012年 / 63卷

关键词：

Lithium titanate; Discharge voltage; Cycling stability; Reversible capacity; Anode materials; LITHIUM-ION BATTERIES; NEGATIVE ELECTRODE MATERIALS; ANODE MATERIAL; LOCAL-STRUCTURE; SPINEL OXIDES; LI-INSERTION; AB-INITIO; CONDUCTIVITY; SYSTEM; TI;

D O I：

10.1016/j.electacta.2011.12.014

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Pristine Li4Ti5O12 (LTO) and Ru-doped Li4Ti5O12 with the composition of Li4Ti4.95 Ru0.05O12 (Ru-doped LTO) are synthesized by solid-state reaction. Ru doping into the lattice of LTO affects the electronic structure of LTO, leading to the modification of optical properties and improvement in electrochemical performance. The variations between pristine LTO and Ru-doped LTO in optical properties are investigated by UV-vis and Raman spectroscopy. In addition, the related microstructure is characterized by XRD, SEM and TEM. The enhancement in electronic conductivity of Ru-doped LTO can provide the discharge capacities of 222, 183 and 132 mAh/g at 1C, 5C and 10C, respectively, during the voltage window of 0.01-2.5 V. Furthermore, the capacity retentions are 95, 92 and 86% for 1C, 5C and 10C rates, respectively, at 100th cycles. The significant improvement in electrochemical performance demonstrates that ruthenium doped lithium titanate is promising as a high rate anode for lithium ion batteries. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：9 / 15

页数：7

共 42 条

[1] Chemical and electrochemical Li-insertion into the Li4Ti5O12 spinel [J].

Aldon, L ;

Kubiak, P ;

Womes, M ;

Jumas, JC ;

Olivier-Fourcade, J ;

Tirado, JL ;

Corredor, JI ;

Vicente, CP .

CHEMISTRY OF MATERIALS, 2004, 16 (26) :5721-5725

[2] Cations distribution and valence states in Mn-substituted Li4Ti5O12 structure [J].

Capsoni, Doretta ;

Bini, Marcella ;

Massarotti, Vincenzo ;

Mustarelli, Piercarlo ;

Chiodelli, Gaetano ;

Azzoni, Carlo B. ;

Mozzati, Maria C. ;

Linati, Laura ;

Ferrari, Stefania .

CHEMISTRY OF MATERIALS, 2008, 20 (13) :4291-4298

[3] Studies of Mg-substituted Li4-xMgxTi5O12 spinel electrodes (0 ≤ x ≤ 1) for lithium batteries [J].

Chen, CH ;

Vaughey, JT ;

Jansen, AN ;

Dees, DW ;

Kahaian, AJ ;

Goacher, T ;

Thackeray, MM .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2001, 148 (01) :A102-A104

[4] STRUCTURE AND ELECTROCHEMISTRY OF THE SPINEL OXIDES LITI2O4 AND LI4/3TI5/3O4 [J].

COLBOW, KM ;

DAHN, JR ;

HAERING, RR .

JOURNAL OF POWER SOURCES, 1989, 26 (3-4) :397-402

[5] Electronic Conductivity and Stability of Doped Titania (Ti1-XMXO2, M = Nb, Ru, and Ta)-A Density Functional Theory-Based Comparison [J].

Dy, Eben ;

Hui, Rob ;

Zhang, Jiujun ;

Liu, Zhong-Sheng ;

Shi, Zheng .

JOURNAL OF PHYSICAL CHEMISTRY C, 2010, 114 (31) :13162-13167

[6] SPINEL ANODES FOR LITHIUM-ION BATTERIES [J].

FERG, E ;

GUMMOW, RJ ;

DEKOCK, A ;

THACKERAY, MM .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1994, 141 (11) :L147-L150

[7] Study on the Theoretical Capacity of Spinel Lithium Titanate Induced by Low-Potential Intercalation [J].

Ge, Hao ;

Li, Ning ;

Li, Deyu ;

Dai, Changsong ;

Wang, Dianlong .

JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (16) :6324-6326

[8] ELECTRONIC-STRUCTURE OF TIO2RU [J].

GLASSFORD, KM ;

CHELIKOWSKY, JR .

PHYSICAL REVIEW B, 1993, 47 (19) :12550-12553

[9] Nano-particle Li4Ti5O12 spinel as electrode for electrochemical generators [J].

Guerfi, A ;

Sévigny, S ;

Lagacé, M ;

Hovington, P ;

Kinoshita, K ;

Zaghib, K .

JOURNAL OF POWER SOURCES, 2003, 119 :88-94

[10] Stoichiometry, structures and polymorphism of spinel-like phases, Li1.33xZn2-2xTi1+0.67xO4 [J].

Hernandez, VS ;

Martinez, LMT ;

Mather, GC ;

West, AR .

JOURNAL OF MATERIALS CHEMISTRY, 1996, 6 (09) :1533-1536

← 1 2 3 4 5 →