Chemical lithiation studies on combustion synthesized V2O5 cathodes with full cell application for lithium ion batteries
Cheah, Yan Ling
Date of Issue2013
School of Materials Science and Engineering
Energy Research Institute @NTU
TUM CREATE Centre for Electromobility
Fundamental studies on Li-intercalation into layered vanadium pentoxide (V2O5), synthesized by urea combustion method, have been successfully carried out by chemical lithiation using butyl lithium at various concentrations. Morphological and structural changes during chemical lithiation are analyzed by field-emission scanning electron microscopy and X-ray diffraction measurements, respectively. Furthermore, chemical states and elemental concentration of these lithiated V2O5 phases were elucidated by X-ray photoelectron spectroscopy and inductively coupled plasma. Electrochemical studies via potentiostatic and galvanostatic modes show that the chemically-lithiated V2O5 phases undergo similar redox behavior as bare V2O5 at respective discharge-states. The electrochemical studies confirmed the occurrence of various phase transformations at various levels of discharge relating to both reduction of vanadium (V5+) and intercalation of lithium ions in V2O5. Finally, the full-cell comprising of lithiated V2O5 cathode and spinel Li4Ti5O12 anode is demonstrated to study their compatibility toward insertion type anodes, delivering the reversible capacity of 80 mAh g−1.
Journal of the electrochemical society
© 2013 The Electrochemical Society. This paper was published in Journal of the Electrochemical Society and is made available as an electronic reprint (preprint) with permission of The Electrochemical Society. The paper can be found at the following official DOI: [http://dx.doi.org/10.1149/2.015308jes]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.