Journal
ELECTROCHIMICA ACTA
Volume 55, Issue 3, Pages 1258-1264Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2009.10.046
Keywords
Heterogeneous electrochemistry; Lithium ion batteries; Pulsed laser deposition
Categories
Funding
- Science & Technology Commission of Shanghai Municipality [08DZ2270500]
- NSFC [20773031]
- 973 Projects [2007CB209702]
- 863 Projects [2007AA03Z322]
Ask authors/readers for more resources
Li2Se-Sb2Se3 nanocomposites with a highly heterogeneous mixture have been fabricated by reactive pulsed laser deposition method. The electrochemical properties of the as-deposited Li2Se-Sb2Se3 thin film during the first charging and discharging have been investigated by the galvanostatic cycling and cyclic voltammetry measurements for the first time. By using ex situ X-ray diffraction (XRD), X-ray photoelectron spectra (XPS), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), and selected-area electron diffraction (SAED) measurements, the decomposition of Li2Se driven by Sb2Se3 under the electrochemical potential is revealed. In the first cycle, the oxidation peaks at 2.5V and 3.2V and the reduction peaks at 2.0V can be attributed to the decomposition and formation of Li2Se with the conversion reaction of Sb2Se3 into Sb2Se5. Our findings demonstrate that nanocomposite Li2Se-Sb2Se3 can possess very high electrochemical activity. These results present a special case of solid-state heterogeneous electrochemistry with both nanostructured binary materials. (c) 2009 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available