Exploring cyclodextrin-driven advancements in aqueous Zn-ion battery: A review

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Aqueous zinc-ion batteries (AZIBs) are explored as a sustainable, safer, and cost-effective alternative to lithium-ion batteries.
• Key challenges hindering AZIBs include zinc dendrite formation and parasitic side reactions, limiting cycle stability and practical use.

Purpose of the Study:

• To investigate the potential of cyclodextrins (CDs) as supramolecular additives for enhancing AZIB performance.
• To explore how CDs can mitigate zinc dendrite growth and suppress undesirable side reactions in AZIBs.

Main Methods:

• Review of recent advancements in utilizing CDs to modify electrolytes and the electrode-electrolyte interface in AZIBs.
• Analysis of the mechanisms by which CDs control zinc deposition and minimize parasitic reactions.

Main Results:

• CDs demonstrate a unique ability to form inclusion complexes, effectively controlling zinc deposition and inhibiting dendrite formation.
• Modification of electrolytes and interfaces with CDs leads to significant improvements in the electrochemical performance and cycling stability of AZIBs.

Conclusions:

• Cyclodextrins show significant promise as multifunctional additives for stabilizing zinc anodes in AZIBs.
• The application of CDs can extend battery lifespan and facilitate the large-scale adoption of AZIB technology for energy storage.