Comparison of Mechanically Milled and Sputter Deposited Tin-Cobalt-Carbon Alloys using Small Angle Neutron Scattering

Published

October 22, 2009

Author(s)

A.D.W. Todd, P.P. Ferguson, John Barker, M.D. Fleischauer, J.R. Dahn

Abstract

Small Angle Neutron Scattering (SANS) has been used to compare nanostructured Sn-Co-C alloys produced by vertical axis mechanical attriting to those produced by magnetron sputter deposition. It was found that the attrited materials had grain sizes that vary with composition and are on the order of 60 Å in size. The sputter deposited materials were either amorphous or had a grain size of approximately 10 Å, depending on the composition. The SANS results were used to further understand the electrochemistry of these materials when used as negative electrodes for lithium ion batteries and to understand why mechanically alloyed Sn-Co-C alloys are far from reaching their expected theoretical specific capacity while sputtered alloys achieve capacities much closer to the expected value.

Citation

Chemistry of Materials

Volume

156

Issue

12

Pub Type

Journals

Download Paper

https://doi.org/10.1149/1.3239988

Local Download

Keywords

Lithium Ion battery, negative electrode, tin-cobalt-carbon, small angle neutron scattering, mechanical milling, magnetron sputtering

Citation

Todd, A. , Ferguson, P. , Barker, J. , Fleischauer, M. and Dahn, J. (2009), Comparison of Mechanically Milled and Sputter Deposited Tin-Cobalt-Carbon Alloys using Small Angle Neutron Scattering, Chemistry of Materials, [online], https://doi.org/10.1149/1.3239988, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=902906 (Accessed October 8, 2024)