Performance of layered Li(Ni1/3Co1/3Mn1/3)O2 as cathode for Li-ion batteries

Shaju, K. M. ; Subba Rao, G. V. ; Chowdari, B. V. R. (2002) Performance of layered Li(Ni1/3Co1/3Mn1/3)O2 as cathode for Li-ion batteries Electrochimica Acta, 48 (2). pp. 145-151. ISSN 0013-4686

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/S0013-4686(02)00593-5

Abstract

Layered Li(Ni1/3Co1/3Mn1/3)O2 was prepared by mixed hydroxide method and characterised by means of X-ray diffraction, X-ray photoelectron spectroscopy (XPS), cyclic voltammetry and charge-discharge cycling. The hexagonal lattice parameters obtained for the compound are: a=2.864 and c=14.233 Å. XPS studies show that the predominant oxidation states of Ni, Co and Mn in the compound are 2+, 3+ and 4+, respectively with small content of Ni3+ and Mn3+ ions. Initial discharge capacity of 160 mAh/g was obtained in the range 2.5-4.4 V and at a specific current of 30 mA/g of which 143 mAh/g was retained at the end of 40 charge-discharge cycles. At lower current (10 mA/g) and in the voltage window 2.5-4.7 V, discharge capacity of 215 mAh/g is obtainable. From the voltage profile and cyclic voltammetry, the redox processes occurring at ~3.8 and ~4.6 V are assigned to the Ni2+/4+ and Co3+/4+ couples, respectively.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Li-ion Batteries; Layered Structures; Cathode Material; XPS
ID Code:51989
Deposited On:02 Aug 2011 08:21
Last Modified:02 Aug 2011 08:21

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