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Synthesis of LiFePO4 in an Open-air Environment

Published online by Cambridge University Press:  31 January 2017

Fei Gu ,
Kichang Jung ,
Taehoon Lim  and
Alfredo A. Martinez-Morales
Fei Gu
Affiliation:
Materials Science and Engineering Program, University of California, Riverside, California92521 Winston Chung Global Energy Center, University of California, Riverside, California92521 College of Engineering Center for Environmental Research and Technology University of California, Riverside, California92507
Kichang Jung*
Affiliation:
Department of Chemical and Environmental Engineering, University of California, Riverside, California92521 College of Engineering Center for Environmental Research and Technology University of California, Riverside, California92507
Taehoon Lim
Affiliation:
Materials Science and Engineering Program, University of California, Riverside, California92521 Winston Chung Global Energy Center, University of California, Riverside, California92521 College of Engineering Center for Environmental Research and Technology University of California, Riverside, California92507
Alfredo A. Martinez-Morales
Affiliation:
Materials Science and Engineering Program, University of California, Riverside, California92521 Winston Chung Global Energy Center, University of California, Riverside, California92521 College of Engineering Center for Environmental Research and Technology University of California, Riverside, California92507
*
*(Email: kjung003@ucr.edu)
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Abstract

Among different efforts to increase the competitiveness of lithium-ion batteries (LIBs) in the energy storage marketplace, reducing the cost of production is a major effort by the LIB industry. This work proposes a synthesis method to decrease the production cost for LiFePO4, by synthesizing the material through an open-air environment solid state reaction.

The lithium (Li)-ion battery is a member of the family of rechargeable batteries. In our approach, iron phosphate (FePO4) powder is preheated to eliminate moisture. Once dried, the FePO4 is mixed with lithium acetate (CH3COOLi), and the mixture is heated in a tube furnace. The solid-state reaction is conducted in an open-air environment. In order to minimize the oxidation of the formed LiFePO4, a modified tube reaction vessel is utilized during synthesis. X-ray Diffraction (XRD) and Energy Dispersive Spectroscopy (EDS) are used to characterize the crystal structure and chemical composition of the synthesized material. Furthermore, scanning electron microscopy (SEM) characterization shows the grain size of the formed LiFePO4 to be in the range of 200 nm to 600 nm. Cycling testing of fabricated battery cells using the synthesized LiFePO4 is done using an Arbin Tester.

Keywords

energy storagescanning electron microscopy (SEM)x-ray diffraction (XRD)
Type
Articles
Information
MRS Advances , Volume 2 , Issue 17: Processing and Manufacturing , 2017 , pp. 939 - 944
Copyright
Copyright © Materials Research Society 2017 

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