Jump to main content
Jump to site search

Issue 8, 2014
Previous Article Next Article

Si nanotubes ALD coated with TiO2, TiN or Al2O3 as high performance lithium ion battery anodes

Author affiliations

Abstract

Silicon based hollow nanostructures are receiving significant scientific attention as potential high energy density anodes for lithium ion batteries. However their cycling performance still requires further improvement. Here we explore the use of atomic layer deposition (ALD) of TiO2, TiN and Al2O3 on the inner, the outer, or both surfaces of hollow Si nanotubes (SiNTs) for improving their cycling performance. We demonstrate that all three materials enhance the cycling performance, with optimum performance being achieved for SiNTs conformally coated on both sides with 1.5 nm of Li active TiO2. Substantial improvements are achieved in the cycling capacity retention (1700 mA h g−1vs. 1287 mA h g−1 for the uncoated baseline, after 200 cycles at 0.2 C), steady-state coulombic efficiency (∼100% vs. 97–98%), and high rate capability (capacity retention of 50% vs. 20%, going from 0.2 C to 5 C). TEM and other analytical techniques are employed to provide new insight into the lithiation cycling-induced failure mechanisms that turn out to be intimately linked to the microstructure and the location of these layers.

Graphical abstract: Si nanotubes ALD coated with TiO2, TiN or Al2O3 as high performance lithium ion battery anodes

Back to tab navigation

Supplementary files

Additions and corrections

Publication details

The article was received on 23 Oct 2013, accepted on 27 Nov 2013 and first published on 27 Nov 2013


Article type: Paper
DOI: 10.1039/C3TA14302C
Citation: J. Mater. Chem. A, 2014,2, 2504-2516
  •   Request permissions

    Si nanotubes ALD coated with TiO2, TiN or Al2O3 as high performance lithium ion battery anodes

    E. M. Lotfabad, P. Kalisvaart, A. Kohandehghan, K. Cui, M. Kupsta, B. Farbod and D. Mitlin, J. Mater. Chem. A, 2014, 2, 2504
    DOI: 10.1039/C3TA14302C

Search articles by author

Spotlight

Advertisements