The Effect of Carbon Doping on Electrochemical Properties of LiFePO₄/C Powders Prepared by Spray Pyrolysis

Abstract:

Spherical LiFePO₄/C precursor powders were successfully prepared by spray pyrolysis. Various types of organic compounds such as glycolic acid, malic acid, citric acid, fructose and sucrose were used as carbon sources. X-ray diffraction analysis revealed that the olivine phase was obtained by calcining over 600 °C under an argon (95%)/hydrogen (5%) atmosphere. The particles exhibited a spherical morphology with approximately 1.5 μm. LiFePO₄/C cathode derived from sucrose exhibited higher rechargeable capacity and cycle stability. The rechargeable capacity of LiFePO₄/C cathode was approximately 154 mAh/g at 1 C. 90% of initial discharge capacity was maintained after 100 cycles.

• Periodical: Key Engineering Materials (Volume 485)
• Pages: 107-110
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.485.107
• Online since: July 2011
• Authors: Takayuki Kodera, Dong Ying Bi, Daisuke Ogawa, Takashi Ogihara
• Keywords: Carbon, LiFePO₄/C, Lithium-Ion Battery, Olivine Structure, Spray Pyrolysis

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