Carbon nanowalls decorated with silicon for lithium-ion batteries

• Published in: Carbon (New York) Vol. 50; no. 3; pp. 1438 - 1442
• Main Authors: Krivchenko, Victor A., Itkis, Daniil M., Evlashin, Stanislav A., Semenenko, Dmitry A., Goodilin, Eugene A., Rakhimov, Alexander T., Stepanov, Anton S., Suetin, Nikolay V., Pilevsky, Andrey A., Voronin, Pavel V.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-03-2012
• Subjects: Carbon; Lithium-ion batteries; Nanocomposites; Nanomaterials; Nanostructure; Silicon; Silicon carbide; Three dimensional
• ISSN: 0008-6223; 1873-3891
• DOI: 10.1016/j.carbon.2011.10.042

Carbon nanowalls (CNWs) are suggested as a promising nanostructured substrate for 3D anodes of lithium-ion batteries. Silicon sputtering onto CNWs results in improved electrochemical performance due to either a large surface area of free-standing CNWs or easy adhesion of deposited silicon clusters via the SiC interface layer formation. The 3D silicon-decorated nanowall framework (SDNF) could give the possibility to minimize the lithium diffusion length and make charge collection more effective yielding better cycling performance at high rates exceeding 2000
mA
h per 1
g of silicon in the range of 0.05–2.00
V at 1.5
C rate.