Dual-Functional Hosts for Polysulfides Conversion and Lithium Plating/Stripping towards Lithium-Sulfur Full Cells

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Lithium-sulfur (Li-S) batteries face significant hurdles, including polysulfide shuttle effects and lithium dendrite growth.
• These issues impede the practical application and long-term stability of Li-S battery technology.

Purpose of the Study:

• This review focuses on dual-functional hosts designed to address both cathode and anode challenges in Li-S batteries.
• It systematically summarizes recent research progress, application scenarios, and underlying mechanisms of these advanced materials.

Main Methods:

• The review categorizes and discusses various dual-functional host materials, such as metal chalcogenides, carbides, nitrides, and heterostructures.
• Theoretical calculation tools, including first-principles methods, for analyzing host material behavior are also outlined.

Main Results:

• Dual-functional hosts demonstrate efficacy in inhibiting polysulfide dissolution and regulating lithium plating/stripping.
• These materials offer a promising strategy for enhancing the electrochemical performance and cycle life of Li-S batteries.

Conclusions:

• Dual-functional hosts represent a critical research area for advancing Li-S battery technology.
• The review provides perspectives for future fundamental research and practical development of these materials.