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Enhanced cycling stability of Li-O2 batteries by using a polyurethane/SiO2/glass fiber nanocomposite separator

Lookup NU author(s): Dr K Zhang, Professor Keith Scott

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This is the authors' accepted manuscript of an article that has been published in its final definitive form by Royal Society of Chemistry, 2018.

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Abstract

© 2018 The Royal Society of Chemistry. A considerable improvement in the cycle performance of aprotic Li-O2 batteries was achieved by using a polyurethane/SiO2 gel nanoparticles/glass fiber (PU/SiO2/GF) nanocomposite separator, where a persistent capability of 1000 mA h g-1 was maintained for at least 300 charge/discharge cycles in a DMSO electrolyte with 1 M LiClO4 and 0.05 M LiI. In comparison, the cell with a conventional GF separator in the same experimental setup only run for 60 cycles. SEM, XRD and FT-IR analyses indicate that the corrosion and dendritic growth of the Li anode were significantly inhibited during the charge/discharge cycling, and the eventual failure of the Li-O2 batteries was attributed to the cathode passivation caused by the accumulation of the discharge product, which blocked the transfer of oxygen and electrolyte to the MWNTs cathode.


Publication metadata

Author(s): Luo K, Zhu G, Zhao Y, Luo Z, Liu X, Zhang K, Li Y, Scott K

Publication type: Article

Publication status: Published

Journal: Journal of Materials Chemistry A

Year: 2018

Volume: 6

Issue: 17

Pages: 7770-7776

Online publication date: 26/03/2018

Acceptance date: 23/03/2018

ISSN (print): 2050-7488

ISSN (electronic): 2050-7496

Publisher: Royal Society of Chemistry

URL: https://doi.org/10.1039/C8TA00879E

DOI: 10.1039/c8ta00879e


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