Electrochemical characterization of Li2MnO3-Li[Ni1/3Co1/3Mn1/3]O2-LiNiO2 cathode synthesized via co-precipitation for lithium secondary batteries

被引：184

作者：

Lim, Jae-Hwan ^{[1
]}

Bang, Hyunjoo ^{[1
]}

Lee, Ki-Soo ^{[1
]}

Amine, K. ^{[2
]}

Sun, Yang-Kook ^{[1
]}

机构：

[1] Hanyang Univ, Ctr Informat & Commun Mat, Dept Chem Engn, Seoul 133791, South Korea

[2] Argonne Natl Lab, Electrochem Technol Program, Div Chem Engn, Argonne, IL 60439 USA

来源：

JOURNAL OF POWER SOURCES | 2009年 / 189卷 / 01期

关键词：

Lithium-ion battery; Cathode; Layered material; Li2MnO3; Co-precipitation; HIGH-CAPACITY; ELECTRODES;

D O I：

10.1016/j.jpowsour.2008.10.035

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Various compositions of the xLi(2)MnO(3)-yLi[Ni1/3Co1/3Mn1/3]O-2-zLiNiO(2) electrode system were synthesized using metal oxide precursor by adopting co-precipitation method. XRD revealed that the prepared cathode materials possess alpha-NaFeO2 structure with R3m space group. Scanning electron micrographs demonstrated the morphology of all the synthesized samples, wherein spherical agglomerates with size of 5-10 mu m have been acknowledged. Among the tested samples, Li[Li0.18Ni0.220Co0.120Mn0.480]O-2 shows the excellent capacity retention (95.6%) in the voltage range of 2.0-4.6 V and the better rate capability than the other samples. But. on the other hand, Li[Li0.20Ni0.133Co0.133Mn0.534]O-2 (x = 0.6, y = 0.4 and z = 0.0) shows the highest discharge capacity. However, the capacity retention of the material at 50 mA g(-1) is lower than that of Li[Li0.18Ni0.220Co0.120Mn0.480]O-2. Furthermore, the capacity retention at 1250 mA g(-1) is only 42.6% of the capacity obtained at 20 mA g(-1). (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：571 / 575

页数：5

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