Table of Contents Author Guidelines Submit a Manuscript
International Journal of Chemical Engineering
Volume 2010, Article ID 175914, 5 pages
http://dx.doi.org/10.1155/2010/175914
Research Article

Mass Production of LiFeP /C Powders by Large Type Spray Pyrolysis Apparatus and Its Application to Cathode for Lithium Ion Battery

Graduate School of Fiber Amenity Engineering, University of Fukui, 9-1 Bunkyo 3, Fukui-shi, Fukui 910-8507, Japan

Received 22 November 2009; Accepted 10 February 2010

Academic Editor: D. Murzin

Copyright © 2010 Shinsuke Akao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Spherical LiFeP /C powders were successfully produced at a rate of 100 g/h using a large type spray pyrolysis apparatus. Organic compounds such as citric acid and sucrose were used as carbon sources. Scanning electron microscopy observation showed that they had a spherical morphology with nonaggregation. X-ray diffraction analysis revealed that the olivine phase was obtained by heating at under argon (95%)/hydrogen (5%) atmosphere. The chemical composition of LiFeP /C powders was in good agreement with that of the starting solution. Electrochemical measurement revealed that the use of citric acid was most effective in ensuring a high rechargeable capacity and cycle stability. The rechargeable capacity of the LiFeP /C cathode obtained using citric acid was 155 mAh/g at a discharge rate of 1 C. Because of the good discharge capacity of the LiFeP /C cathode, it exhibited excellent cycle stability after 100 cycles at each discharge rate. Moreover, this high cycle stability of the LiFeP /C cathode was maintained even at .