Smart Self-Healing Anode/Electrolyte Interphases for Stabilizing Zn Anode

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Zinc anodes are crucial for rechargeable batteries but suffer from instability due to defects and side reactions at the anode/electrolyte interphase (AEI).
• Defect formation during cycling leads to electrode failure and limits the long-term stability of zinc anodes.
• Self-healing AEIs (SAEIs) have emerged as a key strategy to address these limitations by autonomously repairing damage.

Purpose of the Study:

• To review the recent advancements in self-healing anode/electrolyte interphases (SAEIs) for zinc anodes.
• To detail the design strategies, self-healing mechanisms, and stabilization roles of SAEIs.
• To analyze current research methods, challenges, and future prospects for SAEIs in zinc anode technology.

Main Methods:

• Literature review of extrinsic and intrinsic SAEIs for zinc anodes.
• Analysis of self-healing mechanisms and their impact on interfacial stability.
• Discussion of methods for evaluating self-healing performance.

Main Results:

• SAEIs effectively regulate Zn2+ stripping/plating and suppress interfacial side reactions.
• Self-healing capabilities mitigate defect exacerbation, improving the long-term stability of zinc anodes.
• Both extrinsic and intrinsic SAEI strategies show significant potential for enhancing zinc anode performance.

Conclusions:

• SAEIs are a critical development for overcoming the limitations of traditional zinc anodes.
• Further research into design strategies and healing mechanisms will drive the development of high-performance SAEIs.
• This review provides insights for future research on SAEIs for zinc and other metal anodes.