Synthesis and Electrochemistry Characteristics of Layered Li[Li_(1/3-x)Mn_(2/3-x)Ni_xCo_x]O₂ (x = 0.1, 0.15, 0.2, 0.22, 0.25) Cathode Materials for Lithium Secondary Batteries

Abstract:

Li[Li_(1/3-x)Mn_(2/3-x)Ni_xCo_x]O₂ (x=0.1, 0.15, 0.2, 0.22, 0.25) compounds were synthesized and studied by the X-ray diffraction method and electrochemical techniques. The XRD analysis showed that these compounds could be classified as the α-NaFeO₂ structure type. Both a and c parameters decreased linearly, while c/a increased with the increase of Ni and Co content. The first discharge capacity increases with increasing lithium content at the 3a sites in the Li[Li_(1/3-x)Mn_(2/3-x)Ni_xCo_x]O₂. A Li[Li_0.23Mn_0.57Ni_0.1Co_0.1]O₂ electrode delivers discharge capacities of 238 mAh/g at C/10 between 4.6V and 2.5V.

• Periodical: Advanced Materials Research (Volumes 197-198)
• Pages: 1092-1095
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.197-198.1092
• Online since: February 2011
• Authors: Zhi Feng Li, Qian Zhang, Sheng Wen Zhong
• Keywords: Cathode Material, Layered Manganese, Li₂MnO₃, Lithium Secondary Battery

References

[1] J.M. Tarascon and M. Armand: Nature Vol. 414 (2001), p.359.

[2] C.S. Johnson, N. Li, C. Lefief, J.T. Vaughey and M.M. Thackeray: Chem. Mater. Vol. 20 (2009), p.6095.

[3] J. Gao, J. Kim and A. Manthiram: Electrochem. Commun. Vol. 11 (2009), p.84.

[4] J. Jiang, K.W. Eberman, L.J. Krause and J.R. Dahn: J. Electrochem. Soc. Vol. 152 (2005), p. A1879.

[5] A.R. Armstrong, M. Holzapfel, P. Novák, C.S. Johnson, S. -H. Kang, M.M. Thackeray and P.G. Bruce: J. Am. Chem. Soc. Vol. 128 (2006), p.8694.

[6] C.S. Johnson, J. -S. Kim, C. Lefief, N. Li, J.T. Vaughey and M.M. Thackeray: Electrochem. Commun. Vol. 6 (2004), p.1085.

[7] M.M. Thackeray, S. -H. Kang, C.S. Johnson, J.T. Vaughey and S.A. Hackney: Electrochem. Commun. Vol. 8 (2006), p.1531.

[8] J. Rodriguez-Carvajal: Program Fullprof, Version 3. 2, LLB JRC (1997).