Enabling High-Performance All-Solid-State Batteries via Guest Wrench in Zeolite Strategy

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• All-solid-state batteries require advanced solid electrolytes for high energy density and safety.
• Current solid electrolytes face challenges in ionic conductivity, interfacial compatibility, and cost.

Purpose of the Study:

• To develop a novel zeolite membrane (ZM)-based solid electrolyte (GS-ZM) with enhanced ionic conduction and interfacial properties.
• To investigate the "guest wrench" mechanism for activating ionic transport in zeolites.

Main Methods:

• Fabrication of a zeolite membrane (ZM) by incorporating LiTFSI-based guest species (GS) into LiX zeolite.
• Experimental characterization and Car-Parrinello molecular dynamics simulations to study ion transport.
• Assembly and testing of all-solid-state Li-ion and Li-air batteries using the GS-ZM electrolyte.

Main Results:

• The GS-ZM exhibited approximately a 100% increase in ionic conductivity compared to ZM.
• An outstanding Li+ transference number of 0.97 was achieved.
• Assembled batteries demonstrated superior electrochemical performance, including high capacity retention and extended cycle life.

Conclusions:

• The "guest wrench" mechanism effectively enhances ionic conductivity in zeolite-based solid electrolytes.
• GS-ZM offers a promising solution for high-performance, safe, and cost-effective all-solid-state batteries.
• This approach broadens the applicability of zeolite electrolytes in energy storage systems.