Solid Solution Phases in the Olivine-Type LiMnPO4/MnPO4 System

被引：42

作者：

Chen, Guoying ^{[1
]}

Richardson, Thomas J. ^{[1
]}

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2009年 / 156卷 / 09期

关键词：

electrochemistry; lattice constants; lithium compounds; manganese compounds; solid-state phase transformations; stoichiometry; MISCIBILITY GAP; LITHIUM; LIXFEPO4; LIFEPO4; EXISTENCE; PHOSPHATE; DIAGRAM; CATHODE; FE;

D O I：

10.1149/1.3167389

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Nonstoichiometry is reported in the LiMnPO4/MnPO4 system. As lithium is removed from crystalline LiMnPO4 by chemical or electrochemical methods, the resulting two-phase mixture consists of stoichiometric LiMnPO4 and a delithiated phase, LiyMnPO4, whose lattice parameters depend on the global extent of delithiation and on the crystalline domain size of the delithiated phase. This behavior is reproduced during electrochemical insertion of lithium. Again, no evidence for nonstoichiometry was found in the vicinity of LiMnPO4. Attempts to create single-phase solid solutions by heating mixtures of the two phases failed due to the thermal instability of LiyMnPO4.

引用

页码：A756 / A762

页数：7

共 27 条

[1] Thermal stability of LiCoPO4 cathodes [J].

Bramnik, Natalia N. ;

Nikolowski, Kristian ;

Trots, Dmytro M. ;

Ehrenberg, Helmut .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2008, 11 (06) :A89-A93

[2] Phase transitions occurring upon lithium insertion-extraction of LiCoPO4 [J].

Bramnik, Natalia N. ;

Nikolowski, Kristian ;

Baehtz, Carsten ;

Bramnik, Kirill G. ;

Ehrenberg, Helmut .

CHEMISTRY OF MATERIALS, 2007, 19 (04) :908-915

[3] Improving the performance of lithium manganese phosphate through divalent cation substitution [J].

Chen, Guoying ;

Wilcox, James D. ;

Richardson, Thomas J. .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2008, 11 (11) :A190-A194

[4] Metastable solid-solution phases in the LiFePO4/FePO4 system [J].

Chen, Guoying ;

Song, Xiangyun ;

Richardson, Thomas J. .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2007, 154 (07) :A627-A632

[5] Electron microscopy study of the LiFePO4 to FePO4 phase transition [J].

Chen, GY ;

Song, XY ;

Richardson, TJ .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2006, 9 (06) :A295-A298

[6] Toward understanding of electrical limitations (electronic, ionic) in LiMPO4 (M = Fe, Mn) electrode materials [J].

Delacourt, C ;

Laffont, L ;

Bouchet, R ;

Wurm, C ;

Leriche, JB ;

Morcrette, M ;

Tarascon, JM ;

Masquelier, C .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2005, 152 (05) :A913-A921

[7] 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

[8] One-step low-temperature route for the preparation of electrochemically active LiMnPO4 powders [J].

Delacourt, C ;

Poizot, P ;

Morcrette, M ;

Tarascon, JM ;

Masquelier, C .

CHEMISTRY OF MATERIALS, 2004, 16 (01) :93-99

[9] 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

[10] Phase diagram of LixFePO4 [J].

Dodd, JL ;

Yazami, R ;

Fultz, B .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2006, 9 (03) :A151-A155

← 1 2 3 →