Review of the Developments and Difficulties in Inorganic Solid-State Electrolytes

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• All-solid-state lithium-ion batteries (ASSLIBs) offer improved safety and potential for higher energy density compared to conventional liquid electrolyte batteries.
• The solid-state electrolyte (SSE) is key to ASSLIB performance, enabling compatibility with lithium metal anodes and enhanced stability.

Purpose of the Study:

• To provide a comprehensive overview of inorganic solid-state electrolytes (SSEs) for all-solid-state lithium-ion batteries (ASSLIBs).
• To discuss the development, structural characteristics, and ion transport mechanisms of representative inorganic SSEs.
• To address current challenges in practical ASSLIB applications, including interface issues and air stability, and explore potential solutions.

Main Methods:

• Literature review and analysis of existing research on inorganic solid-state electrolytes.
• Detailed explanation of the structure-property relationships in various inorganic SSEs.
• Discussion of Li-ion transport mechanisms within different inorganic electrolyte frameworks.

Main Results:

• Inorganic SSEs exhibit diverse structural compositions influencing their electrochemical properties and stability.
• Understanding the Li-ion transport mechanisms is crucial for optimizing electrolyte performance.
• Key challenges for practical application include managing the electrode-electrolyte interface and ensuring air stability.

Conclusions:

• Inorganic SSEs are critical for advancing all-solid-state lithium-ion battery technology.
• Addressing interface engineering and air stability are paramount for the successful commercialization of ASSLIBs.
• Continued research into the fundamental properties and practical implementation of inorganic SSEs is essential.