STRUCTURE AND PHYSICAL-PROPERTIES OF LITHIUM IRON-OXIDE, LIFEO2, SYNTHESIZED BY IONIC EXCHANGE-REACTION

被引:117
作者
SHIRANE, T
KANNO, R
KAWAMOTO, Y
TAKEDA, Y
TAKANO, M
KAMIYAMA, T
IZUMI, F
机构
[1] KOBE UNIV,FAC SCI,DEPT CHEM,NADA KU,KOBE,HYOGO 657,JAPAN
[2] MIE UNIV,FAC ENGN,DEPT CHEM,TSU,MIE 514,JAPAN
[3] KYOTO UNIV,INST CHEM RES,UJI,KYOTO 611,JAPAN
[4] UNIV TSUKUBA,INST MAT SCI,TSUKUBA,IBARAKI 305,JAPAN
[5] NATL INST RES INORGAN MAT,TSUKUBA,IBARAKI 305,JAPAN
关键词
LITHIUM IRON OXIDE; LAYERED ROCK-SALT; LITHIUM CELL; NEUTRON DIFFRACTION;
D O I
10.1016/0167-2738(95)00066-F
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
Layered LiFeO2 was synthesized by ionic exchange reactions in molten salts from alpha-NaFeO2; its structure was determined by X-ray and neutron diffraction measurements and the magnetic properties were characterized by magnetization measurements and Mossbauer spectroscopy. The reaction conditions were clarified using various molten salts containing lithium, and a ''layered'' sample was obtained by a reaction in LiCl/KCl molten salt at 400 degrees C for 0.5 h; a slightly higher reaction temperature of 500 degrees C gave an orthorhombic LiFeO2. Neutron diffraction data of the ''layered'' LiFeO2 was fitted by a two-phase model with the alpha-NaFeO2 type and a spinel-related type. The Mossbauer spectroscopy indicated two different iron sites, being consistent with the two-phase model.
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页码:227 / 233
页数:7
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