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Water-enabled crystallization of mesoporous SnO2 as a binder-free electrode for enhanced sodium storage

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Abstract

Water-enabled crystallization of amorphous anodic SnO2 is reported. After low-temperature water soaking for a short period of time (e.g., 60 °C for 2 h), mesoporous rutile SnO2 with a remarkably increased surface area is achieved (nearly 2-fold that of the as-anodized SnO2 and 3.3 times that of SnO2 annealed at high temperature). Closer examination reveals that the water-crystallized SnO2 possesses a hierarchical nanostructure that features 1D nanochannels (e.g., ∼30 nm in diameter) and thin channel walls (e.g., 20 nm thick) that are comprised of tiny nanoparticles (e.g., ∼4 nm big). The water-crystallized SnO2 directly grown on the copper foil can be directly applied as a novel type of binder-free electrode for sodium-ion storage, delivering a high reversible capacity of 514 mA h g−1 after 100 cycles at a current rate of 0.1C.

Graphical abstract: Water-enabled crystallization of mesoporous SnO2 as a binder-free electrode for enhanced sodium storage

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Publication details

The article was received on 18 Sep 2017, accepted on 23 Oct 2017 and first published on 23 Oct 2017


Article type: Paper
DOI: 10.1039/C7TA08228B
Citation: J. Mater. Chem. A, 2017, Advance Article
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    Water-enabled crystallization of mesoporous SnO2 as a binder-free electrode for enhanced sodium storage

    H. Bian, R. Dong, Q. Shao, S. Wang, M. Yuen, Z. Zhang, D. Y. W. Yu, W. Zhang, J. Lu and Y. Y. Li, J. Mater. Chem. A, 2017, Advance Article , DOI: 10.1039/C7TA08228B

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