FE-57 MOSSBAUER-SPECTROSCOPY OF REDUCED CATHODES IN THE LI/FES2 BATTERY SYSTEM - EVIDENCE FOR SUPERPARAMAGNETISM

被引：28
作者：
JONES, CHW
KOVACS, PE
SHARMA, RD
MCMILLAN, RS
机构：
[1] Department of Chemistry, Simon Fraser University, Burnaby
[2] National Research Council, Ottawa, Ont.
来源：
JOURNAL OF PHYSICAL CHEMISTRY | 1990年 / 94卷 / 02期
关键词：
D O I：
10.1021/j100365a059
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：
Cathodes removed from fully discharged Li|LiClO4-propylene carbonate|FeS2 cells have been studied by 57Fe Mössbauer spectroscopy. Experiments carried out at 295, 77, and 4.2 K indicated that the major phase present was a mixture of superparamagnetic iron particles and bulklike α-iron. Chemical reduction of FeS2 with n-BuLi in hexane also yielded a similar mixture. Measurements in external magnetic fields of up to 1.5 T confirmed the presence of superparamagnetic iron, and these data led to an estimate of the average particle diameter of 3.6 ± 0.1 nm. An analysis of the data in terms of superferromagnetism was inconsistent with the variable-temperature measurements. © 1990 American Chemical Society.
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页码：832 / 836
页数：5
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