Title: Continuous plating/stripping behavior of solid-state lithium metal anode in a 3D ion-conductive framework

Abstract

The increasing demands for efficient and clean energy-storage systems have spurred the development of Li metal batteries, which possess attractively high energy densities. For practical application of Li metal batteries, it is vital to resolve the intrinsic problems of Li metal anodes, i.e., the formation of Li dendrites, interfacial instability, and huge volume changes during cycling. Utilization of solid-state electrolytes for Li metal anodes is a promising approach to address those issues. In this study, we use a 3D garnet-type ion-conductive framework as a host for the Li metal anode and study the plating and stripping behaviors of the Li metal anode within the solid ion-conductive host. We show that with a solid-state ion-conductive framework and a planar current collector at the bottom, Li is plated from the bottom and rises during deposition, away from the separator layer and free from electrolyte penetration and short circuit. Owing to the solid-state deposition property, Li grows smoothly in the pores of the garnet host without forming Li dendrites. The dendrite-free deposition and continuous rise/fall of Li metal during plating/stripping in the 3D ion-conductive host promise a safe and durable Li metal anode. Here, the solid-state Li anode shows stable cycling at 0.5more » mA cm^–2 for 300 h with a small overpotential, showing a significant improvement compared with reported Li anodes with ceramic electrolytes. By fundamentally eliminating the dendrite issue, the solid Li metal anode shows a great potential to build safe and reliable Li metal batteries.« less

Authors:

Yang, Chunpeng ^[1]; Zhang, Lei ^[1]; Liu, Boyang ^[1]; Xu, Shaomao ^[1]; Hamann, Tanner ^[1]; McOwen, Dennis ^[1]; Dai, Jiaqi ^[1]; Luo, Wei ^[1]; Gong, Yunhui ^[1]; Wachsman, Eric D. ^[1]; Hu, Liangbing ^[1]

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+ Show Author Affiliations

1. Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742

Publication Date:

Mon Mar 26 00:00:00 EDT 2018

Research Org.:

Univ. of Maryland, College Park, MD (United States)

Sponsoring Org.:

USDOE Advanced Research Projects Agency - Energy (ARPA-E)

OSTI Identifier:

1429586

Alternate Identifier(s):

OSTI ID: 1540277

Grant/Contract Number:  

AR0000384; EE0006860

Resource Type:

Published Article

Journal Name:

Proceedings of the National Academy of Sciences of the United States of America

Additional Journal Information:

Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Volume: 115 Journal Issue: 15; Journal ID: ISSN 0027-8424

Publisher:

Proceedings of the National Academy of Sciences

Country of Publication:

United States

Language:

English

Subject:

25 ENERGY STORAGE; Science & Technology; Other Topics; lithium metal anode; solid-state electrolytes; 3D ion-conductive host; garnet electrolyte; dendrite-free