Synthesis and characterization of LiFePO4/(C+Fe2P) composite cathodes

被引：32

作者：

Liu, Hui ^{[1
,2
]}

Xie, Jingying ^{[1
]}

Wang, Ke ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, Energy Sci & Technol Lab, Shanghai 200050, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

来源：

SOLID STATE IONICS | 2008年 / 179卷 / 27-32期

关键词：

LiFePO(4); Fe(2)p; conductive webs; Li-ion batteries;

D O I：

10.1016/j.ssi.2008.01.065

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：

LiFePO(4)/(C + Fe(2)P) composite cathode with composite conductive webs structure was synthesized by modified carbothermal reduction method from the amorphous gel precursor at a heat-treatment temperature of 700 degrees C. The composite material exhibits an improved discharge capacity. Discharge capacities at 1 C rate were improved from 121.4 mAh g(-1) of LiFePO(4)/C to 140.8 mAh g(-1) of LiFePO(4)/(C + Fe(2)P) Composite materials synthesized by two different,routes using the same gel precursor, which could be, at least in part, attributed to the improved conductivity through the in situ formed Fe2P phase by the method. Electrochemical impedance measurements show that coexistence of the carbon and Fe2P phase with LiFePO(4) could decrease the charge transfer resistance and increase surface electronic conductivity of the LiFePO(4)/(C + Fe(2)P) composite cathode. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：1768 / 1771

页数：4

共 13 条

[1] Reducing carbon in LiFePO4/C composite electrodes to maximize specific energy, volumetric energy, and tap density [J].