In-Operando Lithium-Ion Transport Tracking in an All-Solid-State Battery

Area of Science:

• Materials Science
• Electrochemistry
• Nuclear Physics

Background:

• All-solid-state batteries offer advantages like higher energy density and safety.
• Understanding lithium-ion transport is crucial for optimizing battery performance.
• Current methods for tracking lithium in situ are limited, hindering real-time analysis.

Purpose of the Study:

• To develop a quantitative method for real-time tracking of lithium-ion transport in all-solid-state batteries.
• To elucidate the migration mechanisms and pathways of lithium ions within solid electrolytes.
• To enable a deeper understanding of battery operation for future advancements.

Main Methods:

• Utilized a high-intensity thermal neutron source for in-operando analysis.
• Employed lithium-6 as a tracer in a thermal neutron-induced nuclear reaction.
• Quantitatively tracked lithium-ion distribution and movement during battery operation.

Main Results:

• Successfully demonstrated near real-time, quantitative tracking of lithium-ion transport.
• Identified specific lithium-ion migration mechanisms and pathways through the solid electrolyte.
• Provided unprecedented insights into the dynamic behavior of ions within the battery.

Conclusions:

• The study introduces a novel technique for in-operando analysis of all-solid-state batteries.
• This method overcomes limitations in real-time lithium tracking, crucial for battery development.
• Advances in understanding lithium-ion transport will accelerate the progress of all-solid-state battery technology.