V2O5-Coated TiO2 Nanorod Electrodes

被引：31

作者：

Kim, Min Gyu ^{[1
]}

Kim, Hyesun ^{[2
]}

Cho, Jaephil ^{[2
]}

机构：

[1] Pohang Accelerator Lab, Beamline Res Div, Pohang 790784, South Korea

[2] Ulsan Natl Inst Sci & Technol, Sch Energy Engn, Ulsan 689798, South Korea

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2010年 / 157卷 / 07期

关键词：

coatings; electrochemical electrodes; nanofabrication; nanorods; nanowires; solid-state phase transformations; titanium compounds; vanadium compounds; wide band gap semiconductors; ELECTROCHEMICAL PROPERTIES; LITHIUM STORAGE; INSERTION PROPERTIES; CATHODIC MATERIAL; ANODE MATERIAL; ION INSERTION; ANATASE; NANOTUBES; LI; V2O5;

D O I：

10.1149/1.3425619

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

V2O5-coated TiO2 nanorods with a shell thickness of 6.5 nm were prepared by coating V2O5 on anatase TiO2 nanowires. These coated nanorods demonstrated a superior rate capability and capacity at higher C rates with respect to the TiO2 nanowires. The volumetric capacity of the core-shell nanorods were 426 and 329 mAh/cm(3) at 0.5 and 20C rates, respectively, while those of the TiO2 nanowires were 246 and 128 mAh/cm(3), respectively. The enhanced electrochemical properties were due to both a fully reversible phase transition of the nanoscale-V2O5 shell to the crystalline omega-LixV2O5 phase, in contrast to bulk V2O5 to the amorphous phase and its faster pathways for Li ions and electrons into the TiO2 core. (C) 2010 The Electrochemical Society. [DOI: 10.1149/1.3425619] All rights reserved.

引用

页码：A802 / A807

页数：6

共 38 条

[1] TiO2-B nanowires [J].

Armstrong, AR ;

Armstrong, G ;

Canales, J ;

Bruce, PG .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2004, 43 (17) :2286-2288

[2] TiO2(B) nanotubes as negative electrodes for rechargeable lithium batteries [J].

Armstrong, G ;

Armstrong, AR ;

Canales, J ;

Bruce, PG .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2006, 9 (03) :A139-A143

[3] Structural evolution during the reaction of Li with nano-sized rutile type TiO2 at room temperature [J].

Baudrin, E. ;

Cassaignon, S. ;

Koesch, M. ;

Jolivet, J. -P. ;

Dupont, L. ;

Tarascon, J. -M. .

ELECTROCHEMISTRY COMMUNICATIONS, 2007, 9 (02) :337-342

[4] Protonated titanates and TiO2 nanostructured materials:: Synthesis, properties, and applications [J].

Bavykin, Dmitry V. ;

Friedrich, Jens M. ;

Walsh, Frank C. .

ADVANCED MATERIALS, 2006, 18 (21) :2807-2824

[5] Fast, completely reversible Li insertion in vanadium pentoxide nanoribbons [J].

Chan, Candace K. ;

Peng, Hailin ;

Twesten, Ray D. ;

Jarausch, Konrad ;

Zhang, Xiao Feng ;

Cui, Yi .

NANO LETTERS, 2007, 7 (02) :490-495

[6] ON THE DELTA-]GAMMA IRREVERSIBLE TRANSFORMATION IN LI//V2O5 SECONDARY BATTERIES [J].

COCCIANTELLI, JM ;

MENETRIER, M ;

DELMAS, C ;

DOUMERC, JP ;

POUCHARD, M ;

BROUSSELY, M ;

LABAT, J .

SOLID STATE IONICS, 1995, 78 (1-2) :143-150

[7] OMEGA-LIXV2O5 - A NEW ELECTRODE MATERIAL FOR RECHARGEABLE LITHIUM BATTERIES [J].

DELMAS, C ;

BRETHES, S ;

MENETRIER, M .

JOURNAL OF POWER SOURCES, 1991, 34 (02) :113-118

[8] Green energy storage materials: Nanostructured TiO2 and Sn-based anodes for lithium-ion batteries [J].

Deng, Da ;

Kim, Min Gyu ;

Lee, Jim Yang ;

Cho, Jaephil .

ENERGY & ENVIRONMENTAL SCIENCE, 2009, 2 (08) :818-837

[9] 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-+

[10] Synthesis of hierarchically mesoporous anatase spheres and their application in lithium batteries [J].

Guo, Yu-Guo ;

Hu, Yong-Sheng ;

Maier, Joachim .

CHEMICAL COMMUNICATIONS, 2006, (26) :2783-2785

← 1 2 3 4 →