Kim, Y.T. and Gopukumar, S. and Kim, K.B. and Cho, B.W. (2003) Performance of electrostatic spray-deposited vanadium pentoxide in lithium secondary cells. Journal of Power Sources, 117. pp. 110-117. ISSN 0378-7753

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Abstract

Avanadium pentoxide (V2O5) thin-film is deposited on to a platinum substrate using an electrostatic spray deposition (ESD) technique and its performance in a secondary lithium cell is reported for the first time. The deposited thin-film is characterized in terms of structure and surface morphology using X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. The XRD studies reveals that the structure of the thin V2O5 film is amorphous. The crystallinity increases with rise in the annealing temperature from 200 to 275 8C and is composed of orthorhombic V2O5 crystals. Scanning electron micrographs indicate the near-porous nature of the annealed thin-film. The electrochemical behavior of the thin-film of vanadate is investigated by means of cyclic voltammetry (CV) and galvanostatic discharge– charge cycling using a lithium metal anode in the voltage range 2.0–4.0 V (versus Li metal) in 1 M LiClO4/propylene carbonate (PC) as electrolyte. Good cycleability and high capacity (270 mAh g�1) is achieved at a current rate of 0.2C by annealing the thin-film at 275 8C. Furthermore, the capacity remains stable even after 25 cycles; excellent capacity retention is observed even at the 1C rate (260 mAh g�1). It is concluded that ESD is an excellent and cheap technique for fabricating thin-films of vanadate for use as cathodes in secondary lithium cells.

Item Type:	Article
Uncontrolled Keywords:	Electrostatic spray deposition; Vanadium pentoxide; Secondary lithium battery; Cycling; Intercalation
Subjects:	Lithium batteries
Divisions:	UNSPECIFIED
Depositing User:	ttbdar CECRI
Date Deposited:	28 Feb 2012 12:06
Last Modified:	28 Feb 2012 12:06
URI:	http://cecri.csircentral.net/id/eprint/884

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