Nano Archive

Nanoporous cuprous oxide/lithia composite anode with capacity increasing characteristic and high rate capability

Yu, Yan and Shi, Yi and Chen, Chun-Hua (2007) Nanoporous cuprous oxide/lithia composite anode with capacity increasing characteristic and high rate capability. NANOTECHNOLOGY, 18 (5).

Full text is not hosted in this archive but may be available via the Official URL, or by requesting a copy from the corresponding author.

Official URL: http://www.iop.org/EJ/abstract/0957-4484/18/5/0557...

Abstract

Reticular nanoporous thin films of Cu2O–Li2O (Cu:Li = 1:1) composite electrodes supported on nickel foam and copper foil substrates were prepared under optimized conditions at 250 °C by the electrostatic spray deposition (ESD) technique. X-ray diffraction (XRD) and x-ray photoelectron spectroscopy (XPS) indicate that the as-deposited films are composed of Cu2O and Li2O. It is found that such a film as an electrode in lithium cells exhibits abnormal characteristics of strong and continuous capacity rise (up to 0.81% per cycle) and outstanding rate capability. Even before a long-time cycling, the specific capacity at 1, 5, 10 and 15 C is 400, 320, 310 and 305 mA h g−1 for the Cu2O–Li2O film supported on nickel foam substrate. XPS analysis and AC impedance spectroscopy suggest two mechanisms, i.e. valence-related capacity rise and surface-related capacity rise. These composite films may be useful in high power and high energy density lithium-ion batteries.

Item Type:Article
Subjects:Material Science > Tunnelling and microscopic phenomena
Material Science > Nanostructured materials
ID Code:6265
Deposited By:IoN
Deposited On:10 Sep 2009 15:49
Last Modified:10 Sep 2009 15:49

Repository Staff Only: item control page