Engineering of Covalently Bonded Electrode/Electrolyte for Inorganic-Based Solid-State Lithium Batteries

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Solid-state electrolytes offer enhanced safety and stability for lithium batteries.
• Interfacial resistance between electrodes and inorganic solid electrolytes (ISEs) limits battery performance.
• Achieving effective interfacial contact is crucial for optimal solid-state battery function.

Purpose of the Study:

• To address the critical barrier of interfacial contact in solid-state lithium batteries.
• To develop a strategy for constructing a stable covalent electrode/ISE interface.
• To enhance electrochemical stability and reduce interfacial resistance in solid-state batteries.

Main Methods:

• Constructing a covalent interface between the cathode and inorganic solid electrolyte (ISE).
• Investigating the impact of strengthened electrode/ISE interactions on interfacial resistance.
• Evaluating the electrochemical performance and cycling stability of the modified solid-state lithium battery.

Main Results:

• The covalent electrode/ISE interface significantly reduced interfacial resistance.
• Enhanced electrochemical stability was observed due to strengthened interactions.
• The solid-state lithium battery demonstrated outstanding cycling stability, retaining 85% capacity after 700 cycles at 1C.

Conclusions:

• A covalent electrode/ISE interface strategy effectively overcomes interfacial resistance in solid-state lithium batteries.
• This approach leads to significant improvements in battery performance and cycling stability.
• The study presents a promising pathway for developing high-performance solid-state lithium batteries.