Submicron-sized clusters of LiFePO4-C nanoparticles for lithium-ion battery cathodes

Authors

Yunlong Xu, East China University of Science and Technology
Lili Tao, East China University of Science and Technology
Guodong DuFollow
Zaiping Guo, University of WollongongFollow
Yonggang Xu, East China University of Science and Technology
Shucheng Zhang, East China University of Science and Technology

RIS ID

50514

Publication Details

Xu, Y., Tao, L., Du, G., Guo, Z., Xu, Y. & Zhang, S. (2011). Submicron-sized clusters of LiFePO₄-C nanoparticles for lithium-ion battery cathodes. Advanced Science Letters, 4 (11-12), 3523-3527.

Abstract

Submicron-sized clusters of LiFePO₄-C nanoparticles were synthesized using a rheological phase reaction method. X-ray diffraction (XRD), scanning electron microscope (SEM), and high resolution transmission electron microscope (HRTEM) observations show that the as-prepared LiFePO₄-C composite has good crystallinity consisting of submicron-sized clusters of carbon-coated LiFePO₄ nanoparticles with size of around 50 nm. Both the graphite and disordered carbon are observed in the LiFePO₄-C from the Raman spectroscopy and a low intensity ratio of the D band to that of the G band (I_D/I_G = 0.687) is obtained, confirming the high electronic conductivity of this material. The second cycle discharge capacities are 169.6, 131.4, and 95.6 mAh · g^-1 at 0.1, 1.0, and 5.0 C, respectively. Excellent cycling performance with a discharge capacity of 80.9 mAh · g^-1 is still maintained even at a high current density of 10 °C. Our results suggest that this material is a promising cathode material for lithium ion batteries.