Coating of LiNi_1/3Mn_1/3Co_1/3O₂ cathode materials with alumina by solid state reaction at room temperature

Abstract

Alumina coated LiNi_1/3Mn_1/3Co_1/3O₂ particles were obtained by a simple method of solid state reaction at room temperature. The reaction mechanism of solid state reaction at room temperature was investigated. The structure and morphology of the coating materials were investigated by XRD, SEM and TEM. The electrochemical performances of uncoated and Al₂O₃-coated LiNi_1/3Co_1/3Mn_1/3O₂ cathode materials were studied within a voltage window of 3.00–4.35 V at current density of 30 mA/g. SEM, TEM and EDS analytical results indicate that the surface of LiNi_1/3Mn_1/3Co_1/3O₂ particles is coated with very fine Al₂O₃ composite, which leads to the improved cycle ability though a slight decrease in the first discharge capacity is observed. It is proposed that surface treatment by solid state reaction at room temperature is a simple and effective method to improve the cycle performance of LiNi_1/3Co_1/3Mn_1/3O₂ particles.

Keywords

solid state reaction / preparation / electrochemical property / LiNi_1/3Mn_1/3Co_1/3O₂ / alumina / coating

References

[1] LiuG.-x., HongG.-yan.. Synthesis of SiO₂/Y₂O₃: Eu core-shell materials and hollow spheres[J]. Journal of Solid State Chemistry, 2005, 178(5): 1647-1651

[2] GuoH.-j., LiX.-h., ZhangX.-m., ZengS.-m., WangZ.-xing.. Characteristics of LiCoO₂, LiMn₂O₄ and LiNi_0.45Co_0.1Mn_0.45O₂ as cathodes of lithium ion batteries[J]. Journal of Central South University of Technology, 2005, 12(1): 44-49

[3] KimY., KimH. S., MartinS. W.. Synthesis and electrochemical characteristics of Al₂O₃-coated LiNi_1/3Co_1/3Mn_1/3O₂ cathode materials for lithium ion batteries[J]. Electrochimica Acta, 2006, 52(3): 1316-1322

[4] TongD.-g., LaiQ.-y., WeiN.-n., TangA.-d., TangL.-x., HuangK.-l., JiX.-yang.. Synthesis of LiCo_1/3Ni_1/3Mn_1/3O₂ as a cathode material for lithium ion battery by water-in-oil emulsion method[J]. Materials Chemistry and Physics, 2005, 94(2/3): 423-428

[5] PengZ.-d., HuG.-r., LiuY.-xiang.. Influence on performance and structure of spinel LiMn₂O₄ for lithium-ion batteries by doping rare-earch Sm[J]. Journal of Central South University of Technology, 2005, 12(1): 28-32

[6] LiC., ZhangH. P., FuL. J., LiuH., WuY. P., RahmE., HolzeR., WuH. Q.. Cathode materials modified by surface coating for lithium ion batteries[J]. Electrochimica Acta, 2006, 51(19): 3872-3883

[7] ElkasabiY., ChenH. Y., LahannJ.. Multipotent polymer coatings based on chemical vapor deposition copolymerization[J]. Advanced Materials, 2006, 18(12): 1521-1526

[8] WangF. H., GuoR. S., WeiQ. T., ZhouY., LiH. L., LiS. L.. Preparation and properties of Ni/YSZ anode by coating precipitation method[J]. Materials Letters, 2004, 58(24): 3079-3083

[9] PhaniA. R., GammelF. J., HackT.. Structural, mechanical and corrosion resistance properties of Al₂O₃-CeO₂ nanocomposites in silica matrix on Mg alloys by a sol-gel dip coating technique[J]. Surface and Coatings Technology, 2006, 201(6): 3299-3306

[10] ZhouT.-y., YuanX., HongJ.-m., XinX.-quan.. Room-temperature solid-state reaction to nanowires of zinc sulfide[J]. Materials Letters, 2006, 60(2): 168-172

[11] LiF.-s., WangH.-b., WangL., WangJ.-bo.. Magnetic properties of ZnFe₂O₄ nanoparticles produced by a low-temperature solid-state reaction method[J]. Journal of Magnetism and Magnetic Materials, 2007, 309(2): 295-299

[12] LiuG.-x., HongG.-y., SunD.-xian.. Coating Gd₂O₃: Eu phosphors with silica by solid-state reaction at room temperature[J]. Powder Technology, 2004, 145(2): 149-153

[13] CuiH.-t., HongG.-y., WuX.-y., HongY.-jia.. Silicon dioxide coating of CeO₂ nanoparticles by solid state reaction at room temperature[J]. Materials Research Bulletin, 2002, 37(13): 2155-2163

[14] CuiH.-t., HongG.-y., YouH.-p., WuX.-yan.. Coating of Y₂O₃: Eu³⁺ particles with alumina by a humid solid state reaction at room temperature[J]. Journal of Colloid and Interface Science, 2002, 252(1): 184-187

[15] ShahJ. G., PatkiV. A., ShivakamyK., WaniB. N., PatweS. J., RaoU. R.. On the material transport during solid state reactions at room temperature[J]. Applied Physics Communications, 1993, 12(1): 141-152

[16] YuanA. Q., LiaoS., TongZ. F., WuJ., HuangZ. Y.. Synthesis of nanoparticle zinc phosphate dihydrate by solid state reaction at room temperature and its thermochemical study[J]. Materials Letters, 2006, 60(17/18): 2110-2114

[17] YuX.-yuan.Study on layered LiNi_1/3Co_1/3Mn_1/3O₂ and modified spinel LiMn₂O₄[D], 2006, Changsha, Central South University

[18] TammannG., MansuriQ. A.. Hardness of amalgams Ag-Sn[J]. Anorg Chem, 1923, 132: 66-67

[19] ZhangZ. R., LiuH. S., GongZ. L., YangY.. Electrochemical performance and spectroscopic characterization of TiO₂-coated LiNi_0.8Co_0.2O₂ cathode materials[J]. Journal of Power Sources, 2004, 129(1): 101-106

[20] ChenZ. H., DahnJ. R.. Methods to obtain excellent capacity retention in LiCoO₂ cycled to 4.5 V[J]. Electrochimica Acta, 2004, 49(7): 1079-1090

[21] ChenC. H., LiuJ., AmineK.. Symmetric cell approach and impedance spectroscopy of high power lithium-ion batteries[J]. Journal of Power Sources, 2001, 96(2): 321-328