Synthesis of LiFePO4/polyacenes using iron oxyhydroxide as an iron source

被引：17
作者：
Yang, Guiling [1 ,2 ]
Zhang, Xianfa [1 ,2 ]
Liu, Jing [1 ,2 ]
He, Xingguang [1 ,2 ]
Wang, Jiawei [1 ,2 ]
Xie, Haiming [1 ,2 ]
Wang, Rongshun [1 ,2 ]
机构：
[1] NE Normal Univ, Dept Chem, Inst Funct Mat, Changchun 130024, Jilin, Peoples R China
[2] Ctr Mat Sci & Technol, LIB Engn Lab, Changchun 130024, Jilin, Peoples R China
来源：
JOURNAL OF POWER SOURCES | 2010年 / 195卷 / 04期
关键词：
Lithium iron phosphate; Iron oxyhydroxide; Cathode; Mechanism; Lithium ion batteries; ELECTROCHEMICAL PERFORMANCE; LITHIUM INTERCALATION; PHOSPHO-OLIVINES; CATHODE MATERIAL; RAW-MATERIAL; BETA-FEOOH; LIFEPO4; BATTERIES; REDUCTION; COMPOSITE;
D O I：
10.1016/j.jpowsour.2009.08.060
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：
LiFePO4/polyacenes (PAS) composite is synthesized by iron oxyhydroxide as a new raw material and phenol-formaldehyde resin as both reducing agent and carbon source. The mechanism of the reaction is outlined by the analysis of XRD, FTIR as well as TG/DSC. The results show that the formation of LiFePO4 is started at 300 degrees C, and above 550 degrees C, the product can be mainly ascribed to olivine LiFePO4. The electrochemical properties of the synthesized composites are investigated by charge-discharge tests. It is found that the prepared sample at 750 degrees C (S750) has a better electrochemical performance than samples prepared at other temperatures. A discharge capacity of 158 mAh g(-1) is delivered at 0.2 C. Under high discharge rate of 10 C, a discharge capacity of 145 mAh g(-1) and good capacity retention of 93% after 800 cycles are achieved. The morphology of S750 and PAS distribution in it are investigated by SEM and TEM. (C) 2009 Elsevier B.V. All rights reserved.
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收藏
页码：1211 / 1215
页数：5
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