Synthesis and properties of the modification of micro-crystal LiMn_2−xAl _xO₄ cathode material for Li-Ion batteries

Abstract

The micro-single crystal material spinel LiMn_2−xAl _xO₄ was prepared by a sol-gel procedure and modified by alumina; the electrochemical measurements show that the performances and characteristics of modified LiMn_2−xAl _xO₄ electrode material are better than those of LiMn₂O₄. Hence, the modified LiMn_2−xAl _xO₄ is a good cathode material for lithium batteries. This can be explained that the size of the modified particle is larger than that of unmodified material, so electrons can be easily transported between the particles.

Keywords

LiMn_2−xAl _xO₄ / micro-crystal spinel structure / modification / LiMn₂O₄ / cathode material

References

[1] Li H. F., Gao J. K., Zhang S. L. Effect of Overdischarge on Swelling and Recharge Performance of Lithiumion Cells [J]. Chinese Journal of Chemistry, 2008, 26(9): 1 585-1 588.

[2] F Shigeru. Thin Type High Energy Density Lithium Ion Batteries-Now and Future [C]. The 14th International Meeting on Lithium Batteries, Tianjin, China, 2008: 55

[3] C K Yun, Hee Ju Seo. Effects of Preparation Condition on The Electronic and Morphological Characteristics of Li₄Ti₅O₁₂ Powders Prepared by Spray Pyrolysis [C]. The 14th International Meeting on Lithium Batteries, Tianjin, China, 2008:165

[4] Chang J. K., Huang C. H., Tsai W. T., . Manganese Films Electrodeposited at Different Potentials and Temperatures in Ionic Liquid and Their Application As Electrode Materials for Super Capacitors [J]. Electrochemical Acta, 2008, 53: 4 447-4 453.

[5] Bruno S. Lithium Rocking Chair Batteries: an Old Concept [J]. Electrochemical Soc., 1992, 139(10): 2 776-2 781.

[6] Gummow R. J., Kock A. D., Thackeray M. M. Improved Capacity Retention Rechargeable Le 4 V Lithium/Lithium Manganese Oxide (spinel) Cells [J]. Solid State Ionics, 1994, 69(1): 59-67.

[7] Wu C., Wang Z. X., Wu F., . Spectroscopic Studies on Captions Doped Spinel LiMn₂O₄ for Lithium Ion Batteries [J]. Solid State Ionics, 2001, 144(3/4): 277-285.

[8] Tsai Y. W., Santhanam R. H., Wang B. J., . Structure Stabilization of LiMn₂O₄ Cathode Material by Bimetal Dopants [J]. Power Sources, 2003, 119–121: 701-705.

[9] Yu X. Y., Liu Y. X., Hu G., . Electrochemical Characterization of Surface-modified LiMn₂O₄ Cathode Materials for Li-ion Battery [J]. Journal of Wuhan University of Technology-Mater. Sic. Ed., 2006, 21(4): 56-59.

[10] Aurbach D., Levi M. D., Gamolsky K., . Capacity Fading of Li_xMn₂O₄ Spinel Electrodes Studied By XRD and Electro Analytical Techniques[J]. Journal Power Sources, 1999, 81–82: 472-479.