VANADIUM PENTOXIDE ELECTRODES. I: FORMATION OF VANADIUM PENTOXIDE FROM ANODIC ELECTRODEPOSITS

Authors
  1. Andrukaitis, E.
  2. Jacobs, P.W.M.
  3. Lorimer, J.W,
Corporate Authors
Chief of Research and Development, Ottawa ONT (CAN) Director Research and Development Air;University of Western Ontario, London ONT (CAN) Dept of Chemistry
MONITOR AGENCY
Natural Sciences and Engineering Research Council of Canada, Ottawa ONT (CAN)
Abstract
Electrodes composed of hydrated NH4V308 have been prepared by electrochemical formation on various conducting anode substrates. The mechanism of formation involves formation of a sol in a pH gradient at the anode, and subsequent electrophoretic deposition of the sol as an oriented crystalline deposit. These deposits can be decomposed to crystalline V205 by heating at 300C for several hours, and retain their predominant orientation on the substrate with the c axis parallel to, and the dominant flat face of the crystals perpendicular to, the electrode surface. Lithium insertion from aqueous and non-aqueous solutions up to one Liper V205 (0.4 for the hydrated deposit) has been demonstrated. The insertion properties and the nature and structure of the deposits have been investigated by DSC,SEM, chemical and X-ray analysis, measurement of open circuit potentials, and X-ray photoelectron spectroscopy.
Date of publication
06 Oct 1987
Number of Pages
12
Reprinted from
Solid State Ionics, vol 27, 1988, p 19-30
DSTKIM No
93-00316
CANDIS No
127815
Format(s):
Hardcopy;Originator's fiche received by DSIS

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