Enhanced Rate Performance of Carbon Nanotube-Coated LiNi0.45Al0.05Mn1.5O4 Cathode Material

Author

Lu, Y. ; Lin, Y.B. ; Zhao, G.Y. ; Chen, W. ; Chen, S.T. ; Huang, Z.G.

Author_Institution

Dept. of Phys., Fujian Normal Univ., Fuzhou, China

fYear

2012

fDate

27-29 March 2012

Firstpage

1

Lastpage

3

Abstract

Carbon nanotubes (CNTs) has been coated on the surface of LiNi_0.45Al_0.05Mn_1.5O₄ cathode material and the effect of carbon nanotube coating on the electrochemical performances is investigated through the characterization of X-ray diffraction (XRD), cyclic voltammetry (CV), galvanostatic charge-discharge test and electrochemical impedance spectroscopy (EIS), respectively. The results reveal that the CNTs-coating would remarkably enhance the discharge capacity and rate capability, especially at high rate. The improvement of high-rate performance via carbon nanotube coating might be due to the faster kinetic of both the Li-ion diffusion and the charge transfer reaction.

Keywords

X-ray diffraction; aluminium compounds; carbon nanotubes; charge exchange; coatings; diffusion; electrochemical electrodes; electrochemical impedance spectroscopy; lithium compounds; nickel compounds; secondary cells; voltammetry (chemical analysis); C-LiNi_0.45Al_0.05Mn_1.5O₄; CV; EIS; Li-ion diffusion; X-ray diffraction; XRD; carbon nanotube coating; cathode material; charge transfer reaction; cyclic voltammetry; electrochemical impedance spectroscopy; electrochemical performance; galvanostatic charge-discharge test; Batteries; Carbon nanotubes; Cathodes; Coatings; Discharges (electric); Manganese; Materials;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy Engineering Conference (APPEEC), 2012 Asia-Pacific

Conference_Location

Shanghai

ISSN

2157-4839

Print_ISBN

978-1-4577-0545-8

Type

conf

DOI

10.1109/APPEEC.2012.6306967

Filename

6306967