An Emerging Energy Storage System: Advanced Na-Se Batteries

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Sodium-selenium (Na-Se) batteries are gaining attention due to the abundance of sodium and the high conductivity and capacity of selenium.
• Advances in Na-Se batteries primarily focus on developing effective selenium-based cathode materials for sodium-ion storage.

Purpose of the Study:

• To review and discuss the electrochemical mechanisms and challenges in Na-Se batteries.
• To systematically summarize and classify advances in Se-based cathode materials for Na-ion storage.
• To propose strategies for improving electrochemical performance and commercialization of Na-Se batteries.

Main Methods:

• Literature review and systematic classification of Se-based cathode materials.
• Discussion of electrochemical mechanisms and challenges in Na-Se battery systems.
• Analysis of composite materials including Se/carbon, Se/polar material/carbon, and hybrid Se-S alloys.

Main Results:

• Key challenges in Na-Se batteries are identified.
• Advances in Se/carbon composites, Se/polar material/carbon composites, and hybrid Se-S alloys are summarized.
• Strategies for enhancing electrochemical performance are proposed.

Conclusions:

• Further research into electrochemical mechanisms is needed.
• Development of advanced cathode materials is crucial for Na-Se battery performance.
• Commercialization of Na-Se batteries requires overcoming current challenges.