AI Article Synopsis
- Sodium-ion batteries are being developed as a potential replacement for lithium-ion batteries, but their large sodium ions require more space for effective storage.
- Metal-organic frameworks (MOFs) using engineered organic ligands, specifically naphthalene-2,6-dicarboxylic acid, show great promise as anodes, providing better sodium accommodation.
- The MOFs demonstrate impressive sodium storage capabilities with a capacity of 330 mAh/g at 1000 mA/g, showcasing excellent rate performance and cycling stability, indicating their potential for broad energy storage applications.
Article Abstract
Sodium-ion batteries capable of charging and discharging rapidly and durably are eagerly demanded to replace current lithium-ion batteries. However, large Na ions need more space to accommodate them. Metal-organic frameworks are promising anode materials, and their structure and performance are governed by organic ligands. Herein, we report a ligand engineering to design metal-organic frameworks with large conjugated naphthalene-2,6-dicarboxylic acid. Self-supported arrays of metal-organic frameworks reveal robust sodium storage when used as a binder-free anode. The uniquely long and conjugated aromatic ligands endow the metal-organic frameworks with rich sites to accommodate Na ions, thus enabling a high reversible capacity for sodium storage. As a result, such metal-organic frameworks exhibit a high capacity of 330 mAh g at 1000 mA g with remarkable rate capability and cycling performance. This work provides an exciting ligand strategy to design high-capacity metal-organic framework materials and would find extensive applications in various energy storage systems.
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| http://dx.doi.org/10.1002/chem.202403902 | DOI Listing |
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