Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

High Sulfur Loading and Capacity Retention in Bilayer Garnet Sulfurized‐Polyacrylonitrile/Lithium‐Metal Batteries with Gel Polymer Electrolytes

Published

Author(s)

Changmin Shi, Saya Takeuchi, George Alexander, Tanner Hamann, Jonathan O'Neill, Joseph A. Dura, Eric Wachsman

Abstract

AbstractThe cubic‐garnet (Li7La3Zr2O12, LLZO) lithium–sulfur battery shows great promise in the pursuit of achieving high energy densities. The sulfur used in the cathodes is abundant, inexpensive, and possesses high specific capacity. In addition, LLZO displays excellent chemical stability with Li metal; however, the instabilities in the sulfur cathode/LLZO interface can lead to performance degradation that limits the development of these batteries. Therefore, it is critical to resolve these interfacial challenges to achieve stable cycling. Here, an innovative gel polymer buffer layer to stabilize the sulfur cathode/LLZO interface is created. Employing a thin bilayer LLZO (dense/porous) architecture as a solid electrolyte and significantly high sulfur loading of 5.2 mg cm−2, stable cycling is achieved with a high initial discharge capacity of 1542 mAh g−1 (discharge current density of 0.87 mA cm−2) and an average discharge capacity of 1218 mAh g−1 (discharge current density of 1.74 mA cm−2) with 80% capacity retention over 265 cycles, at room temperature (22 °C) and without applied pressure. Achieving such stability with high sulfur loading is a major step in the development of potentially commercial garnet lithium–sulfur batteries.
Citation
Advanced Energy Materials
Volume
13
Issue
42

Keywords

Li-S battery, bilayer LLZO structure, high energy density, high mass loading, in-situ formed polymer-based catholyte

Citation

Shi, C. , Takeuchi, S. , Alexander, G. , Hamann, T. , O'Neill, J. , Dura, J. and Wachsman, E. (2023), High Sulfur Loading and Capacity Retention in Bilayer Garnet Sulfurized‐Polyacrylonitrile/Lithium‐Metal Batteries with Gel Polymer Electrolytes, Advanced Energy Materials, [online], https://doi.org/10.1002/aenm.202301656, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=936087 (Accessed April 19, 2024)
Created September 24, 2023, Updated March 12, 2024