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

被引：521

作者：

Fu, Kun ^{[1
,2
]}

Gong, Yunhui ^{[1
,2
]}

Hitz, Gregory T. ^{[1
,2
]}

McOwen, Dennis W. ^{[1
,2
]}

Li, Yiju ^{[2
]}

Xu, Shaomao ^{[1
,2
]}

Wen, Yang ^{[1
,2
]}

Zhang, Lei ^{[1
,2
]}

Wang, Chengwei ^{[1
,2
]}

Pastel, Glenn ^{[2
]}

Dai, Jiaqi ^{[2
]}

Liu, Boyang ^{[2
]}

Xie, Hua ^{[2
]}

Yao, Yonggang ^{[2
]}

Wachsman, Eric D. ^{[1
,2
]}

Hu, Liangbing ^{[1
,2
]}

机构：

[1] Univ Maryland, Energy Res Ctr, College Pk, MD 20742 USA

[2] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA

来源：

ENERGY & ENVIRONMENTAL SCIENCE | 2017年 / 10卷 / 07期

关键词：

STATE; SEPARATOR; MEMBRANE; CATHODE; ANODE;

D O I：

10.1039/c7ee01004d

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

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.

引用

页码：1568 / 1575

页数：8

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