The source of first-cycle capacity loss in LiFePO4
The source of first-cycle capacity loss in LiFePO4
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DOI：
10.1016/s0378-7753(01)00633-4
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发表时间：
2001-07-01
影响因子：
9.2
通讯作者：
Thomas, JO
中科院分区：
文献类型：
--
作者：
Andersson, AS;Thomas, JO
用中子粉末衍射研究了固态合成LiFePO_4中锂的电化学萃取。将配置的“咖啡袋”型电池< Li-metal lliq. el.l LiFePO4>充电至4.1V，在手套箱中拆卸，并从集电器上刮下复合阴极粉末样品。两相Rietveld精修得到了18：82的锂铁磷酸盐（LiFePO 4）与磷杂镁石（FePO 4）的相比。在没有显著吸收效应的情况下，该比率是LiFePO 4向FePO 4转化的真实表示。在第一个周期的锂提取/插入的可能机制进行了讨论。(C)2001 Elsevier Science B. V.保留所有权利。
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.