A rapid evaluation of vanadium oxide and manganese oxide as battery materials with a micro-electrochemistry technique

The electrochemical behavior of vanadium oxide V2O5 and bismuth doped manga nese oxide Bi-MnO2 as battery materials was studied with a cavity microelec trode (CME). This technique, which allows working on a very few amount of m aterial, appears to be suitable when high scan rates are used. Thus, it is possible to perform many hundreds cycles in a short time. The performances of pure vanadium oxide as lithium insertion material in inorganic media, ex amined with a CME appear to be excellent whereas poor results were obtained with Bi doped MnO2, for which the electrochemical mechanism proceeds via d issolution. (C) 2001 Elsevier Science B.V. All rights reserved.