ZnFe-MOF Protective Layer on Zinc Anode

Stable cycling over 2400 h

In aqueous zinc-ion hybrid supercapacitors, the in-situ grown ZnFe-MOF layer simultaneously suppresses dendrite growth and corrosion side reactions, extending zinc anode lifespan.

Yunhua, Gu · Fuhuai, Cao · Yaya, Wang · Chao, Yang · Moran, Chen · Lihong, Sun · Liu, Rongmei

Journal of Energy Storage 2026

Specifications

Symmetric cell cycling life (low rate)

{'zh': '2433', 'en': '2433'} h

Symmetric cell cycling life (high rate)

{'zh': '2252', 'en': '2252'} h

Energy density

{'zh': '79.9', 'en': '79.9'} Wh kg⁻¹

Specific capacity

{'zh': '60.6', 'en': '60.6'} mAh g⁻¹

Capacity retention after cycling

{'zh': '99.0', 'en': '99.0'} %

Advantages

Suppresses dendrites

The ZnFe-MOF layer promotes uniform zinc ion deposition, effectively avoiding zinc dendrite growth.

Reduces corrosion

The protective layer isolates the zinc anode from direct electrolyte contact, reducing hydrogen evolution and corrosion side reactions.

Hydrophilic

The ZnFe-MOF layer has a contact angle of only 33.9°, improving electrolyte wetting of the anode and facilitating ion transport.

Applications

• Aqueous zinc-based energy storage：Solves dendrite and corrosion issues of zinc anode, extending lifespan of aqueous zinc-based energy storage devices.
• Zinc-ion batteries：Provides a stable protective layer on zinc anode, improving cycling stability of zinc-ion batteries.
• Zinc-based battery anodes：Directly used as anode in zinc-based batteries, replacing conventional zinc foil.
• Energy storage system integration：Improves reliability of zinc-based supercapacitors, facilitating energy storage system integration.