Three-dimensional bilayer garnet solid electrolyte based high energy density lithium metal–sulfur batteries. Issue 7 (15th June 2017)

• Record Type: Journal Article
• Authors: Fu, Kun (Kelvin); Gong, Yunhui; Hitz, Gregory T.; McOwen, Dennis W.; Li, Yiju; Xu, Shaomao; Wen, Yang; Zhang, Lei; Wang, Chengwei; Pastel, Glenn; Dai, Jiaqi; Liu, Boyang; Xie, Hua; Yao, Yonggang; Wachsman, Eric D.; Hu, Liangbing
• Is Part Of: Energy & environmental science. Volume 10:Issue 7(2017)
• Page Start: 1568
• Page End: 1575
• Publication Date: 2017-06-15
• Subjects: Energy conversion -- Periodicals; Fuel switching -- Periodicals; Environmental sciences -- Periodicals; Environmental chemistry -- Periodicals; 333.79
• DOI: 10.1039/c7ee01004d
• Languages: English
• ISSNs: 1754-5692

Abstract

Abstract : A solid electrolyte framework with porous and dense layers for high-energy and safe Li-metal batteries. 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.