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Published on: June 9, 2023
Defect-Engineered Metal-Organic Frameworks via Coordination Competition Induction for Long-Life Aqueous Zinc-Ion
Yanfei Zhang1, Qian Li1, Wanchang Feng1
1School of Chemistry and Materials, Yangzhou Key Laboratory of Smart Materials and Clean Energy, Yangzhou University, Yangzhou, Jiangsu, P. R. China.
Angewandte Chemie (International Ed. in English)
|May 19, 2026
Summary
Defect engineering in metal-organic frameworks (MOFs) creates unsaturated V sites, enhancing aqueous zinc-ion battery (AZIB) performance by improving stability and kinetics for next-generation energy storage.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Metal-organic frameworks (MOFs) are promising for aqueous zinc-ion batteries (AZIBs) due to their tunable structures.
- Limited active sites in MOFs hinder Zn2+ storage capacity and reaction kinetics.
- Developing MOFs with enhanced electrochemical performance is crucial for advanced energy storage.
Purpose of the Study:
- To engineer defects in MOFs to create coordinatively unsaturated metal sites.
- To investigate the impact of these defects on the electrochemical performance of AZIBs.
- To provide insights into MOF design for improved energy storage.
Main Methods:
- Ligand-competition-induced defect engineering strategy.
- Synthesis of Br-MIL(V)-47 with partial substitution of ligands.
- Characterization using in/ex situ spectroscopic analyses.
- Electrochemical performance testing of AZIB cathodes.
Main Results:
- Ordered construction of controllable coordinatively unsaturated V sites achieved.
- Enhanced framework flexibility and spatial buffering observed.
- Optimized cathode (0.4-SSA-TPA) exhibited excellent cycling stability.
- Unsaturated V sites facilitated reversible redox reactions and suppressed structural degradation.
Conclusions:
- Defect engineering is an effective strategy for enhancing MOF performance in AZIBs.
- Unsaturated V sites improve structural stability and electrochemical kinetics.
- This work offers a pathway for designing advanced MOF materials for energy storage.
