Synthesis of nano-crystalline LiFeO2 material with advanced battery performance

被引：40

作者：

Lee, YS

Yoon, CS

Sun, YK

Kobayakawa, K

Sato, Y

机构：

[1] Kanagawa Univ, Dept Appl Chem, Yokohama, Kanagawa 2218686, Japan

[2] Kanagawa Univ, High Tech Res Ctr, Yokohama, Kanagawa 2218686, Japan

[3] Hanyang Univ, Div Mat Sci & Engn, Seoul 133791, South Korea

[4] Hanyang Univ, Dept Chem Engn, Seoul 133791, South Korea

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2002年 / 4卷 / 09期

关键词：

orthorhombic; LiFeO2; nano-crystalline; abrupt capacity drop; lithium secondary batteries;

D O I：

10.1016/S1388-2481(02)00436-8

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

LiFeO2 has been synthesized Lit low temperature (150degreesC) using the solid-state method. It was composed of orthorhombic LiFeO2 and small amount of spinel LiFe5O8 phases. A Li/LiFeO2 cell showed not only a fairly high initial discharge capacity of over 150 mAh/g, but also a good cycle retention rate at room temperature. During, the cycling test. the Li/LiFeO2 cell exhibited a unique abrupt capacity drop near the 13th cycle and continuously showed ail excellent cycling performance of over 99% for 25 cycles. We found that the orthorhombic LiFeO2, underwent a structural change to the spinel phase during the charge/discharge process which resulted in the capacity decline during the long-term cycling. (C) 2002 Elsevier Science B.V. All rights reserved,

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页码：727 / 731

页数：5

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