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Three-dimensional bilayer garnet solid electrolyte based high energy density lithium metal–sulfur batteries

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Abstract

To simultaneously address the challenges of chemical/physical short circuits and electrode volume variation, we demonstrate a three-dimensional (3D) bilayer garnet solid-state electrolyte framework for advanced Li metal batteries. The dense layer is reduced in thickness to a few microns and still retains good mechanical stability, thereby enabling the safe use of Li metal anodes. The thick porous layer acts as a mechanical support for the thin dense layer which serves as a host for high loading of cathode materials and provides pathways for continuous ion transport. Results show that the integrated sulfur cathode loading can reach >7 mg cm−2 while the proposed hybrid Li–S battery exhibits a high initial coulombic efficiency (>99.8%) and high average coulombic efficiency (>99%) during the subsequent cycles. This electrolyte framework represents a promising strategy to revolutionize Li-metal batteries by transitioning to all-solid-state batteries and can be extended to other cathode materials.

Graphical abstract: Three-dimensional bilayer garnet solid electrolyte based high energy density lithium metal–sulfur batteries

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Publication details

The article was received on 12 Apr 2017, accepted on 26 Apr 2017 and first published on 10 May 2017


Article type: Communication
DOI: 10.1039/C7EE01004D
Citation: Energy Environ. Sci., 2017, Advance Article
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    Three-dimensional bilayer garnet solid electrolyte based high energy density lithium metal–sulfur batteries

    K. (. Fu, Y. Gong, G. T. Hitz, D. W. McOwen, Y. Li, S. Xu, Y. Wen, L. Zhang, C. Wang, G. Pastel, J. Dai, B. Liu, H. Xie, Y. Yao, E. D. Wachsman and L. Hu, Energy Environ. Sci., 2017, Advance Article , DOI: 10.1039/C7EE01004D

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