Fabrication and characterization of single-crystal metal-assisted chemically etched rough Si nanowires for lithium-ion battery anodes

McSweeney, William; Lotty, Olan; Holmes, Justin D.; O'Dwyer, Colm

Fabrication and characterization of single-crystal metal-assisted chemically etched rough Si nanowires for lithium-ion battery anodes

Files

ecs_transactions_W_McSweeney-FINAL.pdf(1.39 MB)

Accepted version

Date

2011

Authors

McSweeney, William

Lotty, Olan

Holmes, Justin D.

O'Dwyer, Colm

Publisher

Electrochemical Society

Published Version

10.1149/1.3654199

Abstract

Silicon nanowires were fabricated by a metal assisted chemical (MAC) etching process and routes toward ohmic contacting of substrates for Li-ion battery anode application were developed. Si nanowire layers are comprised of wires that are single crystal with rough outer surfaces. The nanowires are epitaxial with the underlying Si(100) substrate, maintain equivalent doping density and crystal orientation, and are coated with a stoichiometric SiO2. Electrical backside contacting using an In-Ga eutectic allows low-resistance ohmic contacts to low-doped nanowire electrodes for electrochemical testing.

Keywords

Nanowires , Electrochemical cells , Electrodes , Energy storage , Nanostructured materials , Ohmic contacts , Silicon , Silicon oxides , Silicon wafers , Substrates , Doping densities , Electrochemical testing , Etching process , Li-ion batteries , Lithium-ion battery , Low resistance , Outer surfaceSi (100) substrate , Si nanowire , Silicon nanowires

Citation

McSweeney, W., Lotty, O., Holmes, J. D. and O'Dwyer, C. (2011) 'Fabrication and Characterization of Single-Crystal Metal-Assisted Chemically Etched Rough Si Nanowires for Lithium-Ion Battery Anodes', ECS Transactions, 35(34), pp. 25-34. doi: 10.1149/1.3654199