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

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