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The Hydrothermal Synthesis of Lithium Iron Phosphate

Published online by Cambridge University Press:  26 February 2011

Jiajun Chen  and
M. Stanley Whittingham
Jiajun Chen
Affiliation:
[email protected], Binghamton University, Chemistry Department, Vestal Parkway East, Binghamton, NY, 13902, United States
M. Stanley Whittingham
Affiliation:
[email protected], Binghamton University, Chemistry Department, Binghamton, NY, 13902, United States
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Abstract

Well-crystalline LiFePO4 particles were successfully prepared in the temperature range between 120 and 220°C, and complete ion ordering was obtained above 175°C where the unit cell dimensions were identical to high temperature material. The use of a soluble reductant, such as sugar or ascorbic acid, was found to minimize the oxidation of the iron to ferric. The electronic conductivity was enhanced by the deposition of carbon from the sugar, or by the addition of carbon nanotubes to the hydrothermal reactor when over 90% of the lithium could be de-intercalated electrochemically. We have extended the hydrothermal synthesis method to the Mn, Co and Ni analogs as well as to the mixed phosphates, such as LiMnyFe1-yPO4.

Keywords

hydrothermalenergy-storagex-ray diffraction (XRD)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 972: Symposium AA – Solid-State Ionics—2006 , 2006 , 0972-AA13-08
Copyright
Copyright © Materials Research Society 2007

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