Effect of Calcination Temperature on the Structure and Electrochemical Performance of LiNi_0.4Co_0.2Mn_0.4O₂

Abstract:

LiNi_0.4Co_0.2Mn_0.4O₂, as the cathode materials for lithium ion battery, were prepared from the precursors, Ni_0.4Co_0.2Mn_0.4 (OH)₂ which were synthesized by chemical co-precipitation method. The crystal structure and morphology of the prepared powders have been characterized by X-ray diffraction and SEM, respectively. The results show that Li⁺/Ni²⁺ cation mixing decreases with increase of calcination temperature in the range of 700-900°C.The lower degree of cation mixing can improve the transfer of Li ions and lead to layered structure more stable. The discharge capacity and the capacity retention rate of the material is strongly impacted by the reaction temperature.The powders sintered at 900°C show the best electrochemical performance and the initial discharge capacity is 148.3mA·h/g, after 40 cycles, the capacity retention rate is 93.9%.

• Periodical: Advanced Materials Research (Volumes 912-914)
• Pages: 18-22
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.912-914.18
• Online since: April 2014
• Authors: Lin Zhang*, Fei Luo, Jian Hua Wang, Yu Zhong Guo
• Keywords: Cathode Material, LiNi_0.4Co_0.2Mn_0.4O₂, Lithium-Ion Battery, Reaction Temperature

References

[1] Cha J, Kim TJ, Park B, The effect of a metal oxide coating on the cycling behavior at 55°C in orthorhombic LiMnO2 cathode materials, J Electrochem Soc, 2002, 149(3): A288-A292.

DOI: 10.1149/1.1446870

[2] Sun YK, Yoon CS, Lee YS, Electrochemical properties and structural characterization of layered Li[Ni0. 5Mn0. 5]O2 cathode materials, Electrochimica Acta, 2003, 48: 2589-2592.

DOI: 10.1016/s0013-4686(03)00301-3

[3] Bok JS, Lee JH, Lee BK, Effect of synthetic conditions on electrochemical activity of LiCoO2 prepared from recycled cobalt compounds, Solid State Ionics, 2004, 169: 139-144.

DOI: 10.1016/j.ssi.2003.07.003

[4] Politaev VV, Petrenko AA, Nalbandyan VB, Medvedev BS, Shvetsova ES, Crystal structure, phase relations and electrochemical properties of monoclinic Li2MnSiO4, Journal of Solid State Chemistry, 2007, 180: 1045-1050.

DOI: 10.1016/j.jssc.2007.01.001

[5] Y.M. Todorov, K. Numata, Electrochim, Acta 50 (2004) 495–501.

[6] He Yu-shi, PEi Li, Liao Xiao-zhen, MA Zi-feng, Synthesis of LiNi1/3Co1/3Mn1/3O2-zFz cathode material from oxalate precursors for lithium ion battery, Journal of Fluorine Chemistry, 2007, 128: 139-143.

DOI: 10.1016/j.jfluchem.2006.11.002

[7] Liu DT, Wang ZX, Chen LQ, Comparison of structure and electrochemistry of Al- and Fe-doped LiNi1/3Co1/3Mn1/3O2 , Electrochimica Acta, 2006, 51: 4199-4203.

DOI: 10.1016/j.electacta.2005.11.045

[8] Youngsik K, Hyljn SK, Steve WM, Synthesis and electrochemical characteristics of Al2O3-coated LiNi1/3Co1/3Mn1/3O2 cathode materials for lithium ion batteries, Electrochimica Acta, 2006. 52: 1316-1322.

DOI: 10.1016/j.electacta.2006.07.033

[9] PARK S H, YOON C S, KANG S G, KIM H S, MOON S I, SUN YK, Synthesis and structural characterization of layered LiNi1/3Co1/3Mn1/3O2 cathode materials by ultrasonic spray pyrolysis method, Solid State Ionics, 2004, 171: 167-172.

DOI: 10.1016/j.electacta.2003.09.009

[10] DECHENG L, YASUHIRO K, KOICHI K, NOGUCHI H, SAT0 Y, Preparation and electrochemical characteris-tics of LiNi1/3Co1/3Mn1/3O2 coated with metal oxides coating, Journal of Power Sources, 2006, 160: 1342-1348.

DOI: 10.1016/j.jpowsour.2006.02.080

[11] HE Yu-shi, MA Zi-feng, LIAO Xiao-zhen, JIANG Yi, Synthesis and characterization of submicron-sized LiNi1/3Co1/3Mn1/3O2 by a simple self-propagating solid-state metathesis method, Journal of Power Sources, 2007, 163: 1053-1058.

DOI: 10.1016/j.jpowsour.2006.09.061