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Title: Highly stable and reversible lithium storage in SnO2 nanowires surface coated with a uniform hollow shell by atomic layer deposition
Authors: Guan, Cao
Wang, Xinghui
Zhang, Qing
Fan, Zhanxi
Zhang, Hua
Fan, Hong Jin
Keywords: DRNTU::Engineering::Materials::Nanostructured materials
Issue Date: 2014
Source: Guan, C., Wang, X., Zhang, Q., Fan, Z., Zhang, H., & Fan, H. J. (2014). Highly stable and reversible lithium storage in SnO2 nanowires surface coated with a uniform hollow shell by atomic layer deposition. Nano letters, 14(8), 4852-4858.
Series/Report no.: Nano letters
Abstract: SnO2 nanowires directly grown on flexible substrates can be a good electrode for lithium ion battery. However, Sn-based (metal Sn or SnO2) anode materials always suffer from poor stability due to a large volume expansion during cycling. In this work, we utilize atomic layer deposition (ALD) to surface engineer SnO2 nanowires, resulting in a new type of hollowed SnO2-in-TiO2 wire-in-tube nanostructure. This structure has radically improved rate capability and cycling stability than both bare SnO2 nanowire and solid SnO2@TiO2 core-shell nanowire electrodes. Typically a relatively stable capacity of 393.3 mAh/g has been achieved after 1000 charge-discharge cycles at a current density of 400 mA/g, and 241.2 mAh/g at 3200 mA/g. It is believed that the uniform hollow TiO2 shell provides a stable surface protection and the appropriate-sized gap effectively accommodates the expansion of the interior SnO2 nanowire. This ALD-enabled method should be general to many other battery anode and cathode materials, providing a new and highly reproducible and controllable technique for improving battery performance.
DOI: 10.1021/nl502192p
Rights: © 2014 American Chemical Society. This is the author created version of a work that has been peer reviewed and accepted for publication by Nano Letters, American Chemical Society. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
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