Thermal instability of Olivine-type LiMnPO4 cathodes

被引：123

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 POWER SOURCES | 2010年 / 195卷 / 04期

关键词：

Thermal stability; Lithium batteries; Olivine phosphates; SOLID-SOLUTION PHASES; ELEVATED-TEMPERATURES; NONAQUEOUS SOLVENTS; BATTERY CATHODES; ION BATTERIES; STABILITY; LIFEPO4; ELECTROLYTE; LI0.5COO2; LI(NI0.8CO0.15AL0.05)O-2;

D O I：

10.1016/j.jpowsour.2009.08.046

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

The remarkable thermal stability of LiFePO4 and its charged counterpart, FePO4, have been instrumental in its commercialization as a lithium-ion battery cathode material. Despite the similarity in composition and structure, and despite the high thermal stability of the parent compound, LiMnPO4, we find that the delithiated phase LiyMnPO4 (which contains a small amount of residual lithium). is relatively unstable and reactive toward a lithium-ion electrolyte. The onset temperature for heat evolution in the presence of 1 M LiPF6 in 1:1 ethylene carbonate/propylene carbonate is around 150 degrees C, and the total evolved heat is 884 J g(-1), comparable to that produced under similar conditions by charged LiCoO2 electrodes. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1221 / 1224

页数：4

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