Preparation and characterization of Na-doped LiFePO4/C composites as cathode materials for lithium-ion batteries

被引：161

作者：

Yin, Xiongge ^{[1
]}

Huang, Kelong ^{[1
]}

Liu, Suqin ^{[1
]}

Wang, Haiyan ^{[1
]}

Wang, Hao ^{[1
]}

机构：

[1] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2010年 / 195卷 / 13期

关键词：

LiFePO4; Na doping; In situ polymerization restriction; Lithium-ion batteries; PHOSPHO-OLIVINES; 1ST PRINCIPLES; LIXMPO4; M; NANOCOMPOSITE; CONDUCTIVITY; PERFORMANCE; BEHAVIOR; FE;

D O I：

10.1016/j.jpowsour.2010.01.019

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

To improve the performance of LiFePO4, single phase Li1-xNaxFePO4/C (x=0, 0.01. 0.03, 0.05) samples are synthesized by in situ polymerization restriction-carbonthermal reduction method. The effects of Na doping are studied by X-ray diffraction (XRD). scanning electron microscopy (SEM), transmission electron microscope (TEM), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The results indicate that doped Na ion does not destroy the lattice structure of LiFePO4. while enlarges the lattice volume. Electrochemical test results show that the Li0.97Na0.03FePO4/C sample exhibits the best electrochemical performance with initial special discharge capacity of 158 mAh g(-1) at 0.1 C. EIS results demonstrate that the charge transfer resistance of the sample decreases greatly by doping an appropriate amount of Na. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：4308 / 4312

页数：5

共 26 条

[1] Common electroanalytical behavior of Li intercalation processes into graphite and transition metal oxides [J].

Aurbach, D ;

Levi, MD ;

Levi, E ;

Teller, H ;

Markovsky, B ;

Salitra, G ;

Heider, U ;

Heider, L .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1998, 145 (09) :3024-3034

[2] Synthesis and crystal structure of maricite and sodium iron(III) hydroxyphosphate [J].

Bridson, JN ;

Quinlan, SE ;

Tremaine, PR .

CHEMISTRY OF MATERIALS, 1998, 10 (03) :763-768

[3] Surfactant based sol-gel approach to nanostructured LiFePO4 for high rate Li-ion batteries [J].

Choi, Daiwon ;

Kumta, Prashant N. .

JOURNAL OF POWER SOURCES, 2007, 163 (02) :1064-1069

[4] Electronically conductive phospho-olivines as lithium storage electrodes [J].

Chung, SY ;

Bloking, JT ;

Chiang, YM .

NATURE MATERIALS, 2002, 1 (02) :123-128

[5] Size effects on carbon-free LiFePO4 powders [J].

Delacourt, C. ;

Poizot, P. ;

Levasseur, S. ;

Masquelier, C. .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2006, 9 (07) :A352-A355

[6] The existence of a temperature-driven solid solution in LixFePO4 for 0 ≤ x ≤ 1 [J].

Delacourt, C ;

Poizot, P ;

Tarascon, JM ;

Masquelier, C .

NATURE MATERIALS, 2005, 4 (03) :254-260

[7] Kinetic behavior of LiFePO4/C cathode material for lithium-ion batteries [J].

Gao, Fei ;

Tang, Zhiyuan .

ELECTROCHIMICA ACTA, 2008, 53 (15) :5071-5075

[8] Nano-network electronic conduction in iron and nickel olivine phosphates [J].

Herle, PS ;

Ellis, B ;

Coombs, N ;

Nazar, LF .

NATURE MATERIALS, 2004, 3 (03) :147-152

[9] Improved electrode performance of porous LiFePO4 using RuO2 as an oxidic nanoscale interconnect [J].

Hu, Yong-Sheng ;

Guo, Yu-Guo ;

Dominko, Robert ;

Gaberscek, Miran ;

Jamnik, Janko ;

Maier, Joachim .

ADVANCED MATERIALS, 2007, 19 (15) :1963-+

[10] Doping effects of zinc on LiFePO4 cathode material for lithium ion batteries [J].

Liu, H. ;

Cao, Q. ;

Fu, L. J. ;

Li, C. ;

Wu, Y. P. ;

Wu, H. Q. .

ELECTROCHEMISTRY COMMUNICATIONS, 2006, 8 (10) :1553-1557

← 1 2 3 →