Relaxation Crystal Analysis of LiFePO4 Cathode for Li-Ion Secondary Battery

被引：23

作者：

Park, Seungwon ^{[1
]}

Kameyama, Kyohei ^{[1
]}

Yao, Takeshi ^{[1
]}

机构：

[1] Kyoto Univ, Grad Sch Energy Sci, Kyoto 6068501, Japan

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2012年 / 15卷 / 04期

关键词：

ROOM-TEMPERATURE; MISCIBILITY GAP; LITHIUM; LIXFEPO4; TRANSPORT; ELECTRODE; BEHAVIOR; MODEL; MN;

D O I：

10.1149/2.012204esl

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Lithium iron phosphate has been attracting much attention as the next generation cathode material in secondary Li-ion batteries. We inserted lithium into LiXFePO4 (x approximate to 0) electrochemically and investigated the relaxation process of two-phase after termination of lithium insertion process by means of X-ray Rietveld analysis. It was found that the amount of LiFePO4 decreased and that of FePO4 increased after the termination of lithium insertion. It is considered that LiFePO4 including lithium defects preferable for Li diffusion formed during lithium insertion and that the defective LiFePO4 separated to LiFePO4 without defects and FePO4 at the relaxation process. (C) 2012 The Electrochemical Society. [DOI:10.1149/2.012204esl] All rights reserved.

引用

页码：A49 / A52

页数：4

共 21 条

[1] Lithium deintercalation in LiFePO4 nanoparticles via a domino-cascade model [J].

Delmas, C. ;

Maccario, M. ;

Croguennec, L. ;

Le Cras, F. ;

Weill, F. .

NATURE MATERIALS, 2008, 7 (08) :665-671

[2] Lithium battery materials LiMPO4 (M = Mn, Fe, Co, and Ni):: Insights into defect association, transport mechanisms, and doping behavior [J].

Fisher, Craig A. J. ;

Prieto, Veluz M. Hart ;

Islam, M. Saiful .

CHEMISTRY OF MATERIALS, 2008, 20 (18) :5907-5915

[3] Surface structures and crystal morphologies of LiFePO4:: relevance to electrochemical behaviour [J].

Fisher, Craig A. J. ;

Islam, M. Saiful .

JOURNAL OF MATERIALS CHEMISTRY, 2008, 18 (11) :1209-1215

[4] Atomic-scale investigation of defects, dopants, and lithium transport in the LiFePO4 olivine-type battery material [J].

Islam, MS ;

Driscoll, DJ ;

Fisher, CAJ ;

Slater, PR .

CHEMISTRY OF MATERIALS, 2005, 17 (20) :5085-5092

[5] Isolation of Solid Solution Phases in Size-Controlled LixFePO4 at Room Temperature [J].

Kobayashi, Genki ;

Nishimura, Shn-ichi ;

Park, Min-Sik ;

Kanno, Ryoji ;

Yashima, Masatomo ;

Ida, Takashi ;

Yamada, Atsuo .

ADVANCED FUNCTIONAL MATERIALS, 2009, 19 (03) :395-403

[6] Strain accommodation during phase transformations in olivine-based cathodes as a materials selection criterion for high-power rechargeable batteries [J].

Meethong, Nonglak ;

Huang, Hsiao-Ying Shadow ;

Speakman, Scott A. ;

Carter, W. Craig ;

Chiang, Yet-Ming .

ADVANCED FUNCTIONAL MATERIALS, 2007, 17 (07) :1115-1123

[7] Size-dependent lithium miscibility gap in nanoscale Li1-xFePO4 [J].

Meethong, Nonglak ;

Huang, Hsiao-Ying Shadow ;

Carter, W. Craig ;

Chiang, Yet-Ming .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2007, 10 (05) :A134-A138

[8]

Oda M., 2010, EL SOC 218 ECS M

[9] Phospho-olivines as positive-electrode materials for rechargeable lithium batteries [J].

Padhi, AK ;

Nanjundaswamy, KS ;

Goodenough, JB .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1997, 144 (04) :1188-1194

[10]

Park S., 2011, EL SOC 219 ECS M

← 1 2 3 →