Electrochemical characteristics of porous TiO2 encapsulated silicon anode

被引：21

作者：

Jeon, Bup Ju ^{[2
]}

Lee, Joong Kee ^{[1
]}

机构：

[1] Korea Inst Sci & Technol, Battery Res Ctr, Adv Energy Mat Proc Lab, Seoul 130650, South Korea

[2] Hanbuk Univ, Dept Energy Resources, Dongducheon 483777, Gyeonggi Do, South Korea

来源：

ELECTROCHIMICA ACTA | 2011年 / 56卷 / 18期

关键词：

TiO2 coated silicon; Pore size distribution; Lithium secondary batteries; Encapsulated silicon; STRUCTURAL EVOLUTION; SECONDARY BATTERIES; THIN-FILMS; ELECTRODE; PERFORMANCE; DEPOSITION; LI;

D O I：

10.1016/j.electacta.2011.05.056

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

TiO2 coated silicon, which was prepared by the modified sol-gel method, was employed as the anode material for lithium secondary batteries and the relationship between the diffusivity and electrochemical characteristics was investigated. The results showed that the physical properties of the samples, such as their diffusivity and pore size distribution, enhanced the cycling efficiency of the TiO2 coated silicon, probably due to the reduction of the side reactions, which may be closely related to the pore size distribution of the TiO2 coating layer. The pore size of the coating layer plays an important role in retarding the lithium ion diffusion. In the experimental range studied herein, higher capacity retention was exhibited for the TiO2 coated silicon prepared at pH 10.7. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：6261 / 6265

页数：5

共 15 条

[1] Reaction of Li with alloy thin films studied by in situ AFM [J].

Beaulieu, LY ;

Hatchard, TD ;

Bonakdarpour, A ;

Fleischauer, MD ;

Dahn, JR .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2003, 150 (11) :A1457-A1464

[2] Electrochemical performances of Cu nanodots modified amorphous Si thin films for lithium-ion batteries [J].

Chiu, K. -F. ;

Lin, K. M. ;

Lin, H. C. ;

Hsu, C. H. ;

Chen, C. C. ;

Shieh, D. T. .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2008, 155 (09) :A623-A627

[3] Characterization of carbon-coated silicon - Structural evolution and possible limitations [J].

Dimov, N ;

Fukuda, K ;

Umeno, T ;

Kugino, S ;

Yoshio, M .

JOURNAL OF POWER SOURCES, 2003, 114 (01) :88-95

[4] Determination of the diffusion coefficient of lithium ions in nano-Si [J].

Ding, N. ;

Xu, J. ;

Yao, Y. X. ;

Wegner, G. ;

Fang, X. ;

Chen, C. H. ;

Lieberwirth, I. .

SOLID STATE IONICS, 2009, 180 (2-3) :222-225

[5] Enhanced electrochemical performance and thermal stability of La2O3-coated LiCoO2 [J].

Fey, George Ting-Kuo ;

Muralidharan, P. ;

Lu, Cheng-Zhang ;

Cho, Yung-Da .

ELECTROCHIMICA ACTA, 2006, 51 (23) :4850-4858

[6] Preparation of Cu coating on graphite electrode foil and its suppressive effect on PC composition [J].

Gao, J. ;

Zhang, H. P. ;

Zhang, T. ;

Wu, Y. P. ;

Holze, R. .

SOLID STATE IONICS, 2007, 178 (19-20) :1225-1229

[7] Electrical characterization of thin Al2O3 films grown by atomic layer deposition on silicon and various metal substrates [J].

Groner, MD ;

Elam, JW ;

Fabreguette, FH ;

George, SM .

THIN SOLID FILMS, 2002, 413 (1-2) :186-197

[8] Electrochemical performance of SiAlSn films prepared by combinatorial sputtering [J].

Hatchard, TD ;

Topple, JM ;

Fleischauer, MD ;

Dahn, JR .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2003, 6 (07) :A129-A132

[9] Improvement of silicon powder negative electrodes by copper electroless deposition for lithium secondary batteries [J].

Kim, JW ;

Ryu, JH ;

Lee, KT ;

Oh, SM .

JOURNAL OF POWER SOURCES, 2005, 147 (1-2) :227-233

[10] The crystal structural evolution of nano-Si anode caused by lithium insertion and extraction at room temperature [J].

Li, H ;

Huang, XJ ;

Chen, LQ ;

Zhou, GW ;

Zhang, Z ;

Yu, DP ;

Mo, YJ ;

Pei, N .

SOLID STATE IONICS, 2000, 135 (1-4) :181-191

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