The source of first-cycle capacity loss in LiFePO4

被引：559

作者：

Andersson, AS ^{[1
]}

Thomas, JO ^{[1
]}

机构：

[1] Uppsala Univ, Angstrom Lab, SE-75121 Uppsala, Sweden

来源：

JOURNAL OF POWER SOURCES | 2001年 / 97-8卷

关键词：

lithium extraction mechanism; neutron diffraction; iron phosphates;

D O I：

10.1016/S0378-7753(01)00633-4

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The electrochemical extraction of Lithium from solid-state syathesised LiFePO4 has been studied by neutron powder diffraction. A "coffee-bag" type cell of configuration < Li-metal lliq. el.l LiFePO4> has been charged to 4.1 V, dismantled in a glovebox, and the composite cathode powder sample scraped from the current collector. Two-phase Rietveld refinement gave a triphylite (LiFePO4) to heterosite (FePO4) phase-ratio of 18:82. lin the absence of significant absorption effects, this ratio is a true representation of the conversion of LiFePO4 to FeFO4. Possible mechanisms for lithium extraction/insertion during the first-cycle are discussed. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：498 / 502

页数：5

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