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Synthesis and Electrochemical Property of Flowerlike LiFePO4 by Poly(ethylene glycol)-assisted Hydrothermal Process
Xin Guo,Yao-cheng Zhang,Hong-fa Xiang*
Author NameAffiliationE-mail
Xin Guo School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China  
Yao-cheng Zhang School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China  
Hong-fa Xiang* School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China hfxiang@hfut.edu.cn 
Abstract:
Flowerlike LiFePO4 particles self-assembled by plate-like crystals with about 200 nm thickness were prepared by the poly(ethylene glycol)-assisted hydrothermal synthesis. Poly(ethylene glycol) in the hydrothermal system played an important role in reducing the thickness of the plate-like LiFePO4 crystals as a co-solvent and forming the flower-like structure as a soft template. The flowerlike LiFePO4 exhibits high discharge capacity of 140 mAh/g and shows quite good cycling performance in the lithium-ion batteries. Con-sidering that the conductive carbon in the obtained LiFePO4 is negligible, the excellent cell performance suggests that the flowerlike LiFePO4 is a promising cathode material for the lithium-ion batteries.
Key words:  Lithium iron phosphate, Hydrothermal synthesis, Li-ion battery
FundProject:
花状磷酸铁锂的聚乙二醇辅助水热合成及其电化学性能
郭鑫,张遥骋,项宏发*
摘要:
通过聚乙二醇辅助水热法制备了厚度为200 nm的片状磷酸铁锂晶体,并由此自组装为花状磷酸铁锂颗粒.聚乙二醇在水热体系中作为共溶剂使用,它能有效地降低磷酸铁锂片的厚度,并且作为软模板,使磷酸铁锂片自组装成花状结构.这样的花状磷酸铁锂虽然没经过碳包覆改性,在锂离子电池中仍具有高达140 mAh/g的放电容量,并且表现出优异的循环性能,在循环50次后,容量未出现衰减.这种未经碳包覆的磷酸铁锂材料表现出良好的电化学性能.
关键词:  磷酸铁锂,水热合成,锂离子电池
DOI:10.1063/1674-0068/26/03/337-340
分类号: