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1583124 
Journal Article 
Cation-substituted LiFePO4 prepared from the FeSO4 center dot 7H(2)O waste slag as a potential Li battery cathode material 
Wu, L; Wang, Z; Li, X; Guo, H; Li, L; Wang, X; Zheng, J 
2010 
Yes 
Journal of Alloys and Compounds
ISSN: 0925-8388 
497 
1-2 
278-284 
WOS:000278744600056 
The purpose of this study is to utilize the huge FeSO4 7H
(2)O waste slag produced by the titanium dioxide industry. FeSO4 2H(2)O precursors are
synthesized at various pH values by using the waste slag and H2C2O4 2H(2)O as raw materials, and
without any purifying process ICP analysis confirms that the impurity content of FeC2O4 2H(2)O
increases with the pH value. Crystalline cation-substituted LiFePO4 are prepared from the FeC2O4
2H(2)O precursors The cation dopants do not obviously change the structure of LiFePO4, and all
the samples are single olivine-type phase and well crystallized The lattice parameters of LiFePO4
decrease with the increased dopants contents. The dopants limit the size of LiFePO4 nanocrystals,
LiFePO4 particles agglomeration and, consequently, improve the electrochemical performance of
LiFePO4 The cation-substituted LiFePO4 prepared from the waste slag show much better
electrochemical properties than the pure LiFePO4 at high current rates The optimal pH value for
synthesizing FeC2O4 2H(2)O from the waste slag is about 1 0, with 96 6% iron recovery The
cation-substituted LiFePO4 prepared from this precursor exhibits the best electrochemical
properties, which delivers a capacity of 152, 142 and 126 mAh g(-1) at 1C, 2C and 5C rate,
respectively, and shows excellent cycling performance. (C) 2010 Elsevier B V All rights reserved 
Cathode material; LiFePO4; Titanium dioxide; Waste slag; FeSO4 7H(2)O