Title: Electrochemical properties of LiNi_1/3Co_l/3Mn_l/3O₂/Cu(Ac)₂ composite cathode materials for Li-ion batteries

Authors: Jiping Zhu; Quanbao Xu; Guang Yang; Junjie Zhao

Addresses: School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, Anhui, China ' School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, Anhui, China ' School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, Anhui, China ' School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, Anhui, China

Abstract: The layered electrode materials LiNi_1/3Co_l/3Mn_l/3O₂/Cu(Ac)₂ were synthesised by a solid state reaction method. Cupric acetate (Cu(Ac)₂) was used as raw material to mix into LiNi_1/3Co_1/3Mn_1/3O₂ material, and resolved into CuO at low temperatures. The structures, morphologies and electrochemical properties of the complex materials were characterised by X-ray diffractometry (XRD), scanning electron microscopy (SEM), and electrochemistry test. For the rate performance test, the cells were charged and discharged at 0.2~2 C in the voltage of 2.5~4.3 V and 2.5~4.6 V. The results showed that the electrochemical properties and cycle performance of Cu(Ac)₂-mixed LiNi_1/3Co_1/3Mn_1/3O₂ materials were improved. The optimal mixing content of Cu(Ac)₂ was 8 wt% in LiNi_1/3Co_1/3Mn_1/3O₂ material.

Keywords: cathode materials; Cu(Ac)2; cupric acetate; high performance batteries; conductivity; solid state reaction; X-ray diffractometry; XRD; electrode materials; electrochemical properties; lithium-ion batteries; li-ion batteries; nanotechnology; LiNi1/3Co1/3Mn1/3O2.

DOI: 10.1504/IJNM.2013.056057

International Journal of Nanomanufacturing, 2013 Vol.9 No.3/4, pp.311 - 319

Received: 28 Nov 2012
Accepted: 04 Feb 2013
Published online: 31 Mar 2014 *

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