A Flexible Ceramic/Polymer Hybrid Solid Electrolyte for Solid-State Lithium Metal Batteries.

Area of Science:

• Materials Science
• Electrochemistry
• Polymer Science

Background:

• Ceramic/polymer hybrid solid electrolytes (HSEs) combine ceramic electrolytes (CEs) and solid polymer electrolytes (SPEs) to overcome individual limitations.
• Poor interface compatibility between CEs and SPEs hinders the full functionality of HSEs.
• Developing robust interfaces is crucial for efficient ion transport in solid-state batteries.

Purpose of the Study:

• To prepare a flexible ceramic/polymer hybrid solid electrolyte with improved interface compatibility.
• To enhance ion transport pathways within the hybrid solid electrolyte.
• To demonstrate the effectiveness of an in situ coupling reaction for creating advanced solid electrolytes.

Main Methods:

• In situ coupling reaction to synthesize ceramic/polymer hybrid solid electrolytes.
• Characterization of the interface compatibility between ceramic and polymer components.
• Measurement of ionic conductivity and Li+ transference number at room temperature.

Main Results:

• The in situ coupling reaction created strong chemical bonds between ceramic and polymer components, resolving interface compatibility issues.
• The prepared HSE membrane exhibited an ionic conductivity of 9.83 × 10^-4 S cm^-1 at room temperature.
• A high Li+ transference number of 0.68 was achieved, indicating efficient lithium-ion transport.

Conclusions:

• The in situ coupling reaction is an effective strategy for overcoming interface compatibility challenges in ceramic/polymer hybrid solid electrolytes.
• The developed flexible HSE shows promising properties for applications in solid-state batteries.
• This approach offers a pathway for designing high-performance solid electrolytes with enhanced ionic conductivity and transference numbers.