Polyporphyrin-Modified Hierarchical Framework Interface Layer Facilitates Highly Stable Microcrystallized Surface for
Qi Wang1,2, Lei Han1,2,3, Rui Pang1
1Key Laboratory of Material Physics, Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, P. R. China.
ACS Nano
|June 20, 2025
Summary
A new polyindium porphyrin (POF-S) interface layer effectively suppresses zinc dendrite growth in aqueous Zn-ion batteries. This innovation enhances Zn anode stability and cycling life, paving the way for safer, more efficient batteries.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Aqueous Zn-ion batteries offer low cost and high safety but suffer from Zn dendrite growth and low Coulombic efficiency.
- These issues hinder the commercialization of promising Zn-ion battery technology.
Purpose of the Study:
- To develop a multifunctional interface layer for Zn anodes to overcome dendrite formation and improve interfacial stability.
- To investigate the efficacy of a polyindium porphyrin (POF-S) modified carbon nanotube sponge as a Zn anode interface layer.
Main Methods:
- Surface modification of carbon nanotube sponge with polyindium porphyrin (POF-S).
- Theoretical calculations and experimental validation of POF-S properties and performance.
- Electrochemical testing of the modified Zn anode in aqueous electrolytes and full cells.
Main Results:
- POF-S exhibits hierarchical pores and Zn affinity centers, effectively inhibiting dendrite growth and side reactions.
- The interface layer promotes dense, microcrystallized Zn deposition (Zn(002) + Zn(101)).
- The modified Zn anode achieved a cycling lifespan of 5000 h at 1 mA cm-2/1 mAh cm-2 and maintained stability at higher currents and depths.
Conclusions:
- The POF-S interface layer significantly enhances the stability and longevity of Zn anodes in aqueous Zn-ion batteries.
- The developed strategy offers a viable solution for commercializing high-performance and safe aqueous Zn-ion batteries.
- POF-S@Zn//MnO2 full cells demonstrated excellent cycling stability, retaining over 120 mAh g-1 after 2200 cycles at 2 A g-1.
Keywords:
aqueous zinc batterycarbon nanotube spongecoaxial modificationhierarchical structuremicrocrystallized depositionMore Related Videos
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