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Electrospun WNb12O33 nanowires: superior lithium storage capability and their working mechanism

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Abstract

In this study, WNb12O33 with different morphologies were fabricated using various sample collectors through a facile electrospinning method. The WNb12O33 nanorods (NR-WNb12O33) were synthesized using a rounded roller as the sample collector, and the WNb12O33 nanowires (NW-WNb12O33) were prepared using a stainless steel net as a sample collector for the first time. The possible formation process of different morphologies may depend on the self-aggregation of the precursor. Evaluated as a lithium storage anode, NW-WNb12O33 exhibited higher reversible capacity, longer cycle life, and superior rate performance than NR-WNb12O33. Even when cycled at 700 mA gāˆ’1, NW-WNb12O33 could retain capacity retention as high as 86.1% after 700 cycles (only 78.9% for NR-WNb12O33). Moreover, the structural change and lithium storage mechanism were studied via in situ X-ray diffraction. It was found that lithium ions insert into the WNb12O33 structure via three steps, and the total volume change is only 1.55%. In addition, in situ observation results also demonstrated that the lithiation/delithiation behavior of NW-WNb12O33 is highly reversible, which makes it a potential candidate for probable high-rate and long-life anode for lithium-ion batteries.

Graphical abstract: Electrospun WNb12O33 nanowires: superior lithium storage capability and their working mechanism

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Publication details

The article was received on 27 Feb 2017, accepted on 09 Apr 2017 and first published on 10 Apr 2017


Article type: Paper
DOI: 10.1039/C7TA01784G
Citation: J. Mater. Chem. A, 2017, Advance Article
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    Electrospun WNb12O33 nanowires: superior lithium storage capability and their working mechanism

    L. Yan, H. Lan, H. Yu, S. Qian, X. Cheng, N. Long, R. Zhang, M. Shui and J. Shu, J. Mater. Chem. A, 2017, Advance Article , DOI: 10.1039/C7TA01784G

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