Accession Number : ADA310637

Title :   Synthesis and Properties of Vanadium Oxide Aerogel Films.

Descriptive Note : Technical rept. 1 Jun 95-31 May 96,

Corporate Author : CALIFORNIA UNIV LOS ANGELES DEPT OF MATERIALS SCIENCE AND ENGINEERING

Personal Author(s) : Wong, H. P. ; Dunn, B. ; Salloux, K. ; Chaput, F. ; Breiter, M. W.

PDF Url : ADA310637

Report Date : 18 JUN 1996

Pagination or Media Count : 9

Abstract : The fine colloid size, high surface area and controllable density of vanadium oxide aerogels make these materials interesting candidates for lithium insertion electrodes. Thin films of vanadium oxide aerogels were prepared using an alkoxide precursor sol and supercritical drying with CO2. Film preparation methods included spin coating of fine aerogel particles suspended in a solvent and dip coating of the precursor sol onto carbon paper substrates. The room temperature electrical conductivity of partially dehydrated materials (V2O5 0.5 H2O) varies from 10(exp -5) S/cm to 10(exp -4) S/cm depending upon the density of the final aerogel. Potential sweep measurements indicate that the films possess good insertion capacity (approx. 2 Li a per V2O5) and can be cycled reversibly. p1

Descriptors :   *SYNTHESIS, *FILMS, *OXIDES, *VANADIUM COMPOUNDS, SIZES(DIMENSIONS), MATERIALS, THIN FILMS, SUBSTRATES, ELECTRICAL CONDUCTIVITY, ROOM TEMPERATURE, SURFACES, LITHIUM, COATINGS, ELECTRODES, SOLVENTS, SUPERCRITICAL FLOW, CARBON DIOXIDE, COLLOIDS, DRYING, PAPER, DEHYDRATION, INSERTS, DIP COATING, SOL GEL PROCESSES.

Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Coatings, Colorants and Finishes
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE