AAAR 34th Annual Conference
October 12 - October 16, 2015
Hyatt Regency
Minneapolis, Minnesota, USA
Abstract View
Single Step Synthesis of Tin Oxide Nanopillar Arrays by Aerosol Chemical Vapor Deposition
TANDEEP CHADHA, Kelsey Haddad, Pratim Biswas, Washington University in St. Louis
Abstract Number: 585 Working Group: Nanoparticles and Materials Synthesis
Abstract The aerosol chemical vapor deposition (ACVD) process has been established as a viable route for the synthesis of nanostructured thin films of titanium dioxide and nickel oxide. The ability to control morphology and to synthesize single crystal structures in a single-step, atmospheric pressure process make it a promising methodology for scaled up synthesis of thin film nanomaterials. However, using the ACVD process to synthesize different metal oxides presents several challenges because the process relies on a number of different process parameters, including the physical and chemical properties of the organometallic precursor, the sintering characteristics of the desired material and particle size.
In this study, we present direct, gas phase synthesis of nanostructures of tin oxide using the ACVD process. The effect of process parameters on the gas phase particle dynamics and the nanostructure morphology has been explored. Further, thin films were synthesized on stainless steel substrates and were tested for use as lithium ion battery anodes. This binder free approach provides several advantages[1], including control of the final nanostructure morphology on the current collector; the direct attachment of each column to the current collector providing enhanced electrical contact; and scalable manufacturing capabilities.
Control over the morphology of the nanostructured tin oxide was demonstrated by changing the process conditions in the ACVD reactor. For specific process conditions, unique single crystal nanopillars of tin oxide oriented along the (110) plane were observed and confirmed by SEM images, HR-TEM images and the SAED pattern. Control over the length of these nanopillars was achieved in the range of 0.5 – 15 µm. These nanopillars were also used for electrochemical characterization and the bare tin oxide nanopillars yielded an initial cycle discharge capacity of 780 mAh/g. The growth mechanism of these single crystal nanopillars by the ACVD process will be discussed.
References:
1. Chadha, T. S.; Tripathi, A. M.; Mitra, S.; Biswas, P. One-Dimensional, Additive-Free, Single-Crystal TiO2 Nanostructured Anodes Synthesized by a Single-Step Aerosol Process for High-Rate Lithium-Ion Batteries. Energy Technology 2014, 2 (11), 906-911.