Oriented, One‐Dimensional Tin Dioxide–Titanium Dioxide Composites as Anode Materials for Lithium‐Ion Batteries

Journal Article · Thu Jun 21 00:00:00 EDT 2018 · Energy Technology

DOI:https://doi.org/10.1002/ente.201800103· OSTI ID:1457059

Kacica, Clayton T. ^[1]; Wang, Louis S. ^[1]; Chadha, Tandeep S. ^[1]; Biswas, Pratim ^[1]

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1. Aerosol and Air Quality Research Laboratory Center for Aerosol Science and Engineering Department of Energy, Environmental &, Chemical Engineering Washington University in St. Louis St. Louis MO 63130 USA

Abstract Highly oriented columnar nanostructures of tin dioxide (SnO ₂ ) and a composite tin dioxide material with a thin titanium dioxide coating (SnO ₂ –TiO ₂ ) are fabricated using aerosol chemical vapor deposition (ACVD) and are utilized as high‐capacity anode materials in lithium‐ion batteries. The SnO ₂ nanostructures exhibit a specific capacity of 445 mAh g ⁻¹ after 100 cycles at a rate of 1 C, but experience substantial capacity fade at a charge rate of 2 C, and a capacity of 251 mAh g ⁻¹ after 100 cycles. To enhance the capacity retention a coating of TiO ₂ is applied to the electrodes. Comparatively, the SnO ₂ –TiO ₂ electrode exhibits a capacity of 497 mAh g ⁻¹ after 100 cycles at a charge rate of 2 C. Diffusion measurements indicate that no inhibition of lithium diffusion occurs due to a thin TiO ₂ coating. The superior capacity retention of the composite electrode may be attributed to the protection of SnO ₂ from irreversible reactions using a TiO ₂ coating.

• Sponsoring Organization: USDOE
• OSTI ID: 1457059
• Journal Information: Energy Technology, Journal Name: Energy Technology Vol. 6 Journal Issue: 10; ISSN 2194-4288
• Publisher: Wiley Blackwell (John Wiley & Sons)
• Country of Publication: Germany
• Language: English