Cellulose/Cyclodextrin Artificial Interphase

Ion-Selective Transport

Rebuilt amorphous structure via supramolecular cyclodextrin and carboxylated cellulose anchors sulfate anions, enabling selective and fast Zn2+ transport while suppressing side reactions and dendrite growth.

Zhang, Xiaoliang · Xiaojie, Lu · Chen, Lei · Wang, Chunxia · Liu, Yong · Zhang, Xiangwu

Small 2026

Specifications

Lifespan

{'zh': '2200', 'en': '2200'} h

Coulombic efficiency retention

{'zh': '99.88', 'en': '99.88'} %

Initial capacity

{'zh': '115.2', 'en': '115.2'} mAh g⁻¹

Capacity retention

{'zh': '78.32', 'en': '78.32'} %

Advantages

Faster Zn2+ transport

The steric hindrance of cyclodextrin rebuilds cellulose into a more amorphous structure, facilitating Zn2+ migration.

Anions immobilized

β-cyclodextrin acts as an anion receptor to anchor SO4 2- and restrict mobility, enabling ion-selective transport and reducing side reactions.

Water trapped

Numerous hydroxyl groups in the interphase efficiently trap active water, suppressing anode corrosion.

Accommodates volume change

The interphase exhibits outstanding mechanical ability to accommodate anode volume changes during plating.

Applications

• Aqueous zinc batteries：Directly used as anode to assemble long-life aqueous zinc batteries
• Zinc metal anode protection：Artificial interphase suppresses dendrites and side reactions to protect Zn anode
• Battery interphase materials：As interphase material to enhance ion transport and stabilize interface
• Grid-scale energy storage：Improve Zn battery lifespan and reliability for grid-scale storage