An asymmetric quasi-solid electrolyte for high-performance Li metal batteries

Area of Science:

• Materials Science
• Electrochemistry
• Battery Technology

Background:

• Lithium dendrite formation is a major challenge in lithium metal batteries, hindering their safety and performance.
• Developing effective strategies to regulate lithium deposition is crucial for advancing battery technology.

Purpose of the Study:

• To propose and investigate an asymmetric quasi-solid electrolyte for controlled lithium deposition.
• To prevent lithium dendrite formation and enhance the cycling stability and specific capacity of lithium metal batteries.

Main Methods:

• Formulation of an asymmetric quasi-solid electrolyte containing thiourea.
• Electrochemical characterization of lithium deposition behavior.
• Evaluation of battery cycling performance and specific capacity.

Main Results:

• The thiourea in the electrolyte adsorbs onto the lithium surface, guiding uniform lithium deposition.
• The electrolyte effectively suppresses lithium dendrite formation.
• Demonstrated excellent cycling stability and high specific capacity in lithium metal batteries.

Conclusions:

• The asymmetric quasi-solid electrolyte with thiourea is a promising strategy for enabling safe and high-performance lithium metal batteries.
• This approach offers a viable solution to the critical issue of lithium dendrite growth.