INQUISUR 21779
INSTITUTO DE QUIMICA DEL SUR
Unidad Ejecutora - UE
artículos
Título:
Sol-gel synthesis and electrical characterization of doped-carbon decorated mixed conductor ceramics
Autor/es:
SOLEDAD TERNY; J. DE FRUTOS; JESÚS VEGA CASTILLO; M. A. FRECHERO; M. A. DE LA RUBIA
Revista:
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2019 vol. 241 p. 66 - 74
ISSN:
0921-5107
Resumen:
New mixed composite conductors of compositions: Li3V2−x [Cu]x (PO4)3/C and Li3V2−x [Nb]x(PO4)3/C (x=0.1;0.2 and 0.3) have been synthesized by the sol-gel method using Citric and Oxalic acids as a primary carbonsource and Carbon Black or Carbon Nano-Fibers as secondary carbon sources. The combination of these carbonforms with the Nb doped-polyanion material boosts their electrical behavior up to 10−3 S.m−1 that is two ordersof magnitude higher than the Li3V2(PO4)3/C at a room temperature. SEM, TEM and Micro-Raman Spectroscopyevidence that Carbon Nano-Fiber blend is better conductor than Carbon Black blend, which is also revealed bycomplex conductivity spectra. The conductivity behavior of Nb-doped ceramic is better than the Cu-doped one.The obtained niobium composites have a much more stable structure compared to the copper ones because theniobium atoms fit well in the vanadium position, whereas copper atoms are expelled from the structured.
