conductivity will reduce the internal IR loss and improve Polycrystalline vanadium oxynitrides have been prepared by battery performance. Metal oxynitrides are also of great heat-treating V 2 O 5 at high temperature in a flowing ammonia interest as advanced catalysts because dual active sites atmosphere. Single-phase cubic samples, with the rock salt are presented by the metal and the oxygen. The metallic structure, were produced by nitridation at 600-700ΨC. Powder functions include hydrogenation and dehydrogenation of diffraction data from neutrons at two wavelengths and CuKβ£ hydrocarbons whereas the acidic functions include isomer-X-rays of these oxynitrides were analyzed using the Rietveld ization and cracking (8, 9).
method, but strong correlation among the atomic displacement
Structure-composition relationships have been preparameters, site occupancies, and the N/O ratio did not allow viously reported for the vanadium oxynitrides (10,11).
refinement of unique compositions. Measured densities and Potorochin et al. (10) have studied the compositional limits cell volumes were used to limit the possible compositional space and the lattice parameters of cubic vanadium oxynitrides.
for each sample, and these were further limited by the charge Brauer and Reuther (11) investigated the phase relationneutrality requirement. The electrical resistivity of the singlephase sample is about 2 Ψ 10 Ψ3 β Ψ cm and is weakly tempera-ships in the V-N-O system by X-ray powder diffraction ture dependent below room temperature. Magnetic susceptibilas a function of pressure. However, there are no reports, ity measurements show no evidence of magnetic ordering and to our knowledge, of a systematic study of the structure yield a magnetic moment of 0.25 B per V atom. Electrochemiand physical properties of vanadium oxynitrides. In this cal lithium intercalation measurements indicate that only a paper, we report the synthesis, Rietveld structure analysis, small concentration of lithium ions were inserted into the cathelectrical, magnetic, and electrochemical properties of vaode due to the close-packed NaCl structure of cubic vanadium nadium oxynitrides.
oxynitride.