Accession Number : ADA296963

Title :   Synthesis and Characterization of Vanadium Oxide Aerogels.

Descriptive Note : Technical rept. no. 2, 1 Jun 94-31 May 95,

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

Personal Author(s) : Chaput, F. ; Dunn, B. ; Fuqua, P. ; Salloux, K.

PDF Url : ADA296963

Report Date : 14 JUL 1995

Pagination or Media Count : 23

Abstract : Vanadium pentoxide aerogels were synthesized by supercritical drying with CO2. The aerogels were prepared using a variety of sol compositions from the system VO(OC3H7)3/H2O/acetone. The materials were found to be of fairly low density (0.04g/cu cm to 0. lg/cu cm) with surface areas in the range of 300 to 400 meters squared/g. Chemical and structural studies indicate that the aerogels are hydrated oxides of composition V2O5 nH2O with n = 2.0 to 2.2 and possess a fibrous morphology. When partially dehydrated, the vanadate aerogels exhibit electron transport with conductivity and activation energy values comparable to those of aerogels. Electrochemical measurements demonstrate that lithium can be intercalated reversibly into the structure. jg p.2

Descriptors :   *OXIDES, *VANADIUM, MEASUREMENT, FIBERS, SYNTHESIS, STRUCTURAL PROPERTIES, ELECTRON TRANSPORT, MORPHOLOGY, ELECTROCHEMISTRY, HYDRATES, SURFACES, LITHIUM, CHEMISTRY, CHEMICAL REACTIONS, REVERSIBLE, SUPERCRITICAL FLOW, LOW DENSITY, DRYING, ACTIVATION ENERGY.

Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Polymer Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE