Morphology control and electrochemical properties of LiFePO4/C composite cathode for lithium ion batteries

被引：26

作者：

Hamamoto, K. ^{[1
]}

Fukushima, M. ^{[1
]}

Mamiya, M. ^{[1
]}

Yoshizawa, Y. ^{[1
]}

Akimoto, J. ^{[1
]}

Suzuki, T. ^{[1
]}

Fujishiro, Y. ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Adv Mfg Res Inst, Moriyama Ku, Nagoya, Aichi 4638560, Japan

来源：

SOLID STATE IONICS | 2012年 / 225卷

关键词：

Lithium-ion batteries; LiFePO4; Cathode; Porous; Gelation-freezing method; FREEZING METHOD; FABRICATION; ELECTRODE; GELATION; SIZE;

D O I：

10.1016/j.ssi.2012.01.034

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：

We developed a novel cathode electrode system composed of ultra highly porous structured LiFePO4/carbon composite for lithium ion batteries by a gelation-freezing (GF) method. This unique technique can be used to provide various shaped components by use of specific molds, and varying the freezing temperature could control the micrometer-sized cylindrical pore size and wall thickness in the porous composite. Film shapes of carbons that originate in the gelatin were found in the porous LiFePO4/carbon composite cathodes. The porous composite cathode shows a good electrochemical performance at a low current density, despite the low carbon content. Charge/discharge capacities for the LiFePO4/carbon composites decreased with decreasing gel-freezing temperature. The template-free GF method for fabricating the porous LiFePO4/carbon composite opens up a new route to develop electrodes with controlled morphologies for applications in high power lithium batteries. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：560 / 563

页数：4

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