Aluminothermal synthesis and characterization of Li3V2-xAlx(PO4)3 cathode materials for lithium ion batteries

被引：89

作者：

Ai, Dengjun ^{[1
]}

Liu, Kaiyu ^{[1
]}

Lu, Zhouguang ^{[1
]}

Zou, Minmin ^{[1
]}

Zeng, Dongqing ^{[1
]}

Ma, Jun ^{[1
]}

机构：

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

来源：

ELECTROCHIMICA ACTA | 2011年 / 56卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Lithium ion batteries; Cathode materials; Lithium vanadium phosphate; Aluminothermal reaction; VANADIUM PHOSPHATE; ELECTROCHEMICAL PERFORMANCE; INSERTION PROPERTIES; DOPED LI3V2(PO4)(3); SPECTROSCOPY; REDUCTION; STABILITY; CAPACITY;

D O I：

10.1016/j.electacta.2010.12.063

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Monoclinic Li3V2-xAlx(PO4)(3) with different Al3+ doping contents (x = 0, 0.05, 0.08, 0.10 and 0.12) have been prepared by a facile aluminothermal reaction. Aluminum nanoparticles have been used as source for Al3+ and nucleus for Li3V2-xAlx(PO4)(3) nucleation as well as reducing agent in the aluminothermal strategy. The products were investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and electrochemical methods. The XRD results show that the as-obtained Li3V2-xAlx(PO4)(3) has a phase-pure monoclinic structure, irrespective of the Al3+ doping concentration. Electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) results reveal that the charge-transfer resistance of the Li3V2(PO4)(3) is reduced and the reversibility is enhanced after V3+ substituted by Al3+. In addition, The Li3V2-xAlx(PO4)(3) phases exhibit better cycling stability than the pristine Li3V2(PO4)(3). (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：2823 / 2827

页数：5

共 28 条

[1] Electrochemical and thermal behavior of LiNi1-zMzO2 (M = Co, Mn, Ti) [J].

Arai, H ;

Okada, S ;

Sakurai, Y ;

Yamaki, J .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1997, 144 (09) :3117-3125

[2] Building better batteries [J].

Armand, M. ;

Tarascon, J. -M. .

NATURE, 2008, 451 (7179) :652-657

[3] 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

[4] The effect of Al substitution on the electrochemical insertion properties of the lithium vanadium phosphate, Li3V2(PO4)3 [J].

Barker, J. ;

Gover, R. K. B. ;

Burns, P. ;

Bryan, A. .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2007, 154 (04) :A307-A313

[5] 3 ELECTRODE ELECTROCHEMICAL VOLTAGE SPECTROSCOPY (TEVS) - EVALUATION OF A MODEL LITHIUM ION SYSTEM [J].

BARKER, J .

ELECTROCHIMICA ACTA, 1995, 40 (11) :1603-1608

[6] Lithium insertion properties of the layered LiMoO2R(3)over-bar-m made by a novel carbothermal reduction method [J].

Barker, J ;

Saidi, MY ;

Swoyer, JL .

SOLID STATE IONICS, 2003, 158 (3-4) :261-267

[7] Combination of Lightweight Elements and Nanostructured Materials for Batteries [J].

Chen, Jun ;

Cheng, Fangyi .

ACCOUNTS OF CHEMICAL RESEARCH, 2009, 42 (06) :713-723

[8] Preparation and electrochemical performance studies on Cr-doped Li3V2(PO4)3 as cathode materials for lithium-ion batteries [J].

Chen, Yinghua ;

Zhao, Yanming ;

An, Xiaoning ;

Liu, Jianmin ;

Dong, Youzhong ;

Chen, Ling .

ELECTROCHIMICA ACTA, 2009, 54 (24) :5844-5850

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

Chung, SY ;

Bloking, JT ;

Chiang, YM .

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

[10] THERMAL-STABILITY OF LIXCOO2, LIXNIO2 AND LAMBDA-MNO2 AND CONSEQUENCES FOR THE SAFETY OF LI-ION CELLS [J].

DAHN, JR ;

FULLER, EW ;

OBROVAC, M ;

VONSACKEN, U .

SOLID STATE IONICS, 1994, 69 (3-4) :265-270

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