REVERSIBLE LITHIUM INTERCALATION IN ALKALI METAL VANADIUM BRONZES (Mx V60 13 + DELTA, WHERE M = K, RB OR CS)

PDF

Authors
  1. Andrukaitis, E.
Corporate Authors
Chief of Research and Development, Ottawa ONT (CAN) Director Research and Development Air
Abstract
A thermal treatment step of electrochemically prepared crystalline solid solutions of ammonium hexavanadates containing K, Rb, or Cs formed adherent electrodes ona conducting substrate without the need for binders. These Mx V6O13+ delta bronzes where M = K, Rb or Cs belong to the ternary system V2O4-V2O5-M2O. By controlling the electrodepositoin/decomposition processes, various alkali metal to vanadium (0.0 to 0.65) and oxygen to vanadium ratios (2.2 to 2.5) were studied. RbV6O13 + delta bronzes have not been studied before but are reversible to lithium insertion. The maximum capacity was limited to the presence of only small amounts of alkali metal, with some improvement in cycle life, compared to V6O13 + delta. Phase changes during lithium intercalation depended on the bronze stoichiometry. The voltage plateaus and capacity for Li of small M/V ratio bronzes during intercalation were similar to V2O5 when hexavanadates were thermally decomposed in air, and to V6O13 when heated from 300 to 400C under a vacuum atmosphere.
Date of publication
20 May 1994
Number of Pages
3
DSTKIM No
94-07082
CANDIS No
143249
Format(s):
Hardcopy;Document Image stored on Optical Disk

Permanent link

Document 1 of 1

Date modified: