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Issue 7, 2017
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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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Supplementary files

Article information


Submitted
12 Apr 2017
Accepted
26 Apr 2017
First published
10 May 2017

Energy Environ. Sci., 2017,10, 1568-1575
Article type
Communication

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, 10, 1568
DOI: 10.1039/C7EE01004D

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