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- Publisher
- Springer Journals
- Copyright
- Copyright © 2012 by Springer-Verlag Berlin Heidelberg
- Subject
- Chemistry; Electrochemistry; Renewable and Green Energy; Optical and Electronic Materials; Condensed Matter Physics; Energy Storage
- ISSN
- 0947-7047
- eISSN
- 1862-0760
- DOI
- 10.1007/s11581-012-0825-6
- Publisher site
- See Article on Publisher Site
Abstract
The surface of LiNi0.4Co0.2Mn0.4O2 cathode is coated using MgO coating materials. The electrochemical properties of the coated materials are investigated as a function of the pH value of the coating solution and the composition of coating materials. Their microscopic structural features have been investigated using scanning electron microscopy and X-ray diffraction. The electrochemical properties of the samples were monitored using coin-cell by galvanostatic charge–discharge cycling test, EDS test, EIS test, and cyclic voltammetry. The coating solution with pH = 10.5 is found to be favorable for the formation of stable coating layers, which enhances the electrochemical properties. In contrast, 2 % MgO-coated LiNi0.4Co0.2Mn0.4O2 shows better cycle performance and rate capability than the bare sample. Such enhancements are attributed to the presence of a stable MgO layer which acts as the interfacial stabilizer on the surface of LiNi0.4Co0.2Mn0.4O2.
Journal
Ionics – Springer Journals
Published: Nov 20, 2012