Design of a Multifunctional Interlayer for NASCION-Based Solid-State Li Metal Batteries
Journal article, 2020

NASCION-type Li conductors have great potential to bring high capacity solid-state batteries to realization, related to its properties such as high ionic conductivity, stability under ambient conditions, wide electrochemical stability window, and inexpensive production. However, their chemical and thermal instability toward metallic lithium (Li) has severely hindered attempts to utilize Li as anode material in NASCION-based battery systems. In this work, it is shown how a tailored multifunctional interlayer between the solid electrolyte and Li anode can successfully address the interfacial issues. This interlayer is designed by creating a quasi-solid-state paste in which the functionalities of LAGP (Li1.5Al0.5Ge1.5(PO4)3) nanoparticles and an ionic liquid (IL) electrolyte are combined. In a solid-sate cell, the LAGP-IL interlayer separates the Li metal from bulk LAGP and creates a chemically stable interface with low resistance (≈5 Ω cm2) and efficiently prevents thermal runaway at elevated temperatures (300 °C). Solid-state cells designed with the interlayer can be operated at high current densities, 1 mA cm−2, and enable high rate capability with high safety. Here developed strategy provides a generic path to design interlayers for solid-state Li metal batteries.

thermal runaway

lithium metal anode

high current density

interlayer

solid state batteries

Author

Shizhao Xiong

Chalmers, Physics, Materials Physics

Xi'an Jiaotong University

Yangyang Liu

Xi'an Jiaotong University

Piotr Jankowski

Technical University of Denmark (DTU)

Qiao Liu

Xi'an Jiaotong University

Florian Nitze

Chalmers, Physics, Materials Physics

K Xie

National University of Defense Technology

Jiangxuan Song

Xi'an Jiaotong University

Aleksandar Matic

Chalmers, Physics, Materials Physics

Advanced Functional Materials

1616-301X (ISSN)

Vol. 30 22 2001444

Subject Categories

Materials Chemistry

DOI

10.1002/adfm.202001444

More information

Latest update

10/6/2020