Synthesis and Characterization of LiVOPO₄ Cathode Material by Solid-State Method

Abstract:

Lithium vanadyl phosphate (β-LiVOPO₄) cathode material for lithium ion batteries was prepared via a novel solid state method. The microstructure and electrochemical properties of the sample were characterized by X-ray diffraction, scanning electron microscopy, galvanostatically discharge/discharge and cyclic voltammetry techniques, respectively. X-ray diffraction patterns showed that β-LiVOPO₄ has an orthorhombic structure with space group of Pnma. The discharge capacity of LiVOPO₄ sample is 89.9 mAh•g^-1 in the first cycle, and in the 50th cycle it is 76.2 mAh•g^-1 at the current density of 10 mA•g^-1 between 3.0-4.5 V. The chemical diffusion coefficient ( ) value determined from CV is about 10-11 cm² s^-1. Experimental results indicate that further efforts are needed to improve electrochemical performances of LiVOPO₄ material synthesized by solid state method; however, it has a higher discharge plateau around 3.9 V.

• Periodical: Advanced Materials Research (Volumes 554-556)
• Pages: 436-439
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.554-556.436
• Online since: July 2012
• Authors: An Ping Tang, Ze Qiang He, Jie Shen, Guo Rong Xu
• Keywords: Lithium-Ion Battery, LiVOPO₄, Solid State Method

References

[1] A. K. Padhi, K. S. Nanjundaswamy and J. B. Goodenough: J. Electrochem. Soc. Vol. 144 (1997), p.1188

[2] M. Y. Saidi, J. Barker, H. Huang and et al: J. Power Sources Vol. 119-121 (2003), p.266

[3] J. Barker, M. Saidi and J. L. Swoye: J. Electrochem. Soc. Vol. 151(2004), p.A796

[4] B. M. Azmi, T. Ishihara, H. Nishiguchi and et al: J. Power Sources Vol. 146 (2005), p.525

[5] M. M. Ren, Z. Zhou, L. W. Su and et al: J. Power Sources Vol. 189 (2009), p.786

[6] J. Ganbicher, T. L. Mercier, Y. Chahre and et al: J. Electrochem. Soc. Vol. 146 (1999), p.4375

[7] K. Saravanan, H. S. Lee, M. Kuezma and et al: J. Mater. Chem. Vol. 21 (2011), p.10042

[8] T. A. Kerr, J. Gaubicher and L. F. Nazar: Electrochem. Solid State Lett. Vol. 3 (2000), p.460

[9] N. Dupre, J. Gaubicher, T. L. Mercier and et al: Solid State Ionics Vol. 140 (2001), p.209

[10] M. M. Ren, Z. Zhou, X. P. Gao and et al: J. Phys. Chem. C Vol. 112 (2008), p.13043

[11] K. H. Lii, C. H. Li, C. Y. Cheng and et al: J. Solid State Chem. Vol. 95 (1991), p.352

[12] K. Nagamine, T. Honma and T. Komatsuw: J. Amer. Chem. Soc. Vol. 91 (2008), p.3920

[13] Y. N. Song, P. Y. Zavalij and M. S. Whittingham: J. Electrochem. Soc. Vol. 152 (2005), p.A721