Sol-Gel Synthesis And Characterization Of Molybdenum Oxide/Polypyrrole Hybrids

Abstract

Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching data sources, "".,""" qathering and maintaining the data needed, and completing and reviewing the collection of information. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)Bruce S. Dunn Department of Materials Science and Engineering University of California, Los Angeles Los Angeles, CA 90095 SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)Office of Naval Research 800 North Quincy Street Arlington, VA 22217 PERFORMING ORGANIZATION REPORT NUMBERTechnical Report #13 SPONSOR/MONITOR'S ACRONYM(S)11. SPONSORING/MONITORING AGENCY REPORT NUMBER DISTRIBUTION AVAILABILITY STATEMENTReproduction in whole, or in part, is permitted for any purpose of the United States Government. This document has been approved for public release and sale; its distribution is unlimited. SUPPLEMENTARY NOTES Published in: Proceedings of the MRS Symposium on Organic/Inorganic Hybrid Materials ABSTRACTMonolithic molybdenum oxide/polypyrrole hybrid aerogels and xerogels were successfully synthesized through sol-gel methods. The PPy formed appears to be ß-substituted. A 100 fold increase in electrical conductivity was observed for the hybrids (4 x 10" 3 S/cm) as compared to the pristine Mo0 3 gels (2 x 10' 5 S/cm). An initial increase in Li + intercalation capacity is also observed for the hybrid. The electrical conductivity and Li* intercalation depend greatly on the concentration of Mo-tricholoro alkoxide precursor and sol aging conditions. The hybrid aerogels have a density of 0.5 g/cc and a surface area of 120 m 2 /g. The as-formed gels are amorphous and crystallize to the orthorhombic Mo0 3 phase at 375°C. Reproduction in whole, or in part, is permitted for any purpose of the United States Government.This document has been approved for public release and sale; its distribution is unlimited. SOL-GEL SYNTHESIS AND CHARACTERIZATION OF MOLYBDENUM OXIDE/POLYPYRROLE HYBRIDSW. DONG*, B. DUNN MSE Department, University of California, Los Angeles, CA 90095, *jahn@seas.ucla.edu ABSTRACTMonolithic Mo oxide/polypyrrole hybrid aerogels and xerogels were successfully synthesized through sol-gel methods. The PPy formed appears to be ß-substituted. A 100 fold increase in electrical conductivity was observed for the hybrids (4x 10" 3 S/cm) as compared to the pristine M0O3 gels (2x 10" 5 S/cm). An initial increase in Li + intercalation capacity is also observed for the hybrid. The electrical conductivity and Li + intercalation depend greatly on the concentration of Motrichloro alkoxide precursor and sol aging conditions. The hybrid aerogels have a density of 0.5 g/cc and a surface area of 120 m 2 /g. The as-formed gels are amorphous and crystallize to the orthorhombic Mo0 3 phase at 375°C.

Electrically conductive oxide aerogels: new materials in electrochemistry

“…11), was approximately 1006 larger than that of the pristine MoO 3 gels. 155 This value is also ten times greater than that of a system in which the conducting polymer (polyaniline) was intercalated into the crystalline MoO 3 structure. 156 PPy was adventitiously doped by incorporating Cl 2 derived from the isopropoxide precursor, MoCl 3 (O i Pr) 2 .…”