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Ionic liquid/ether-plasticized quasi-solid-state electrolytes for long-life lithium–oxygen cells

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Abstract

Rechargeable lithium–oxygen (Li–O2) cells have aroused great attention due to their high theoretical energy density. However, a great challenge remains for the practical applications of Li–O2 cells. One of the obstacles is the instability of the Li anode with organic electrolytes, even for relatively stable ether-based electrolytes. In this work, a quasi-solid state electrolyte, composed of a polymer, an inorganic ceramic electrolyte, Li salt and a plasticizer, was prepared. The quasi-solid state electrolyte plasticized by a hybrid of an ether and ionic liquid exhibits a stable interfacial contact with the metallic Li anode. At a limited capacity of 1000 mA h g−1, the Li–O2 cell with the quasi-solid-state electrolyte can be stably cycled for 196 cycles at 400 mA g−1. The good cycling stability of the cell can be attributed to the stable metallic Li/electrolyte interface enabled by the F-containing protective layer formed in situ from the decomposition of the ionic liquid during cycling. This work provides a new design of solid state electrolytes for long-life Li–O2 cells.

Graphical abstract: Ionic liquid/ether-plasticized quasi-solid-state electrolytes for long-life lithium–oxygen cells

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Publication details

The article was received on 07 Jul 2018, accepted on 22 Oct 2018 and first published on 23 Oct 2018


Article type: Paper
DOI: 10.1039/C8NJ03389G
Citation: New J. Chem., 2018, Advance Article
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    Ionic liquid/ether-plasticized quasi-solid-state electrolytes for long-life lithium–oxygen cells

    C. Zhu, Q. Sun, J. Xie, Y. Jin, K. Wang, Z. Chen, J. Tu, G. Cao and X. Zhao, New J. Chem., 2018, Advance Article , DOI: 10.1039/C8NJ03389G

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