Title :
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
Abstract :
Carbon nanotubes (CNTs) has been coated on the surface of LiNi0.45Al0.05Mn1.5O4 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-LiNi0.45Al0.05Mn1.5O4; 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;
Conference_Titel :
Power and Energy Engineering Conference (APPEEC), 2012 Asia-Pacific
Conference_Location :
Shanghai
Print_ISBN :
978-1-4577-0545-8
DOI :
10.1109/APPEEC.2012.6306967
