Beta- Ketoenamine-Linked Benzobisthiazole-Based COF Nanocomposite Anode for High-Performance Sodium-Ion Battery
The Research group of Prof. Abhijit Patra, Department of Chemistry, developed a covalent organic framework (COF) nanocomposite anode for high-performance sodium-ion batteries. In current energy storage technology, sodium-ion batteries (SIBs) are emerging as a promising alternative to lithium-ion batteries, due to the low cost and high natural abundance of sodium. However, the advancement of SIBs has been constrained by the poor compatibility of Na+ ions with traditional graphite and the low initial efficiency of hard-carbon materials as anodes. In our recent study, we addressed this bottleneck by developing a porous nanocomposite anode material. We fabricated a ?-ketoenamine-linked benzobisthiazole-based COF grown on multi-walled carbon nanotubes using a polycondensation method. The carbon nanotubes in the composite significantly boost electrical conductivity, while the large abundance of carbonyl and thiazole units provides redox-active sites for sodium-ion storage. The COF nanocomposite anode exhibits a high specific capacity of 567 ± 12 mAh g-1 at 20 mA g-1 current density, fast-charge capability with 150 mAh g-1 at 2 A g-1, and long-term cycling stability, retaining about 77% capacity even after 3000 cycles. Further, the detailed electrochemical and spectroscopic studies reveal that sodium ions are stored within the porous frameworks through adsorption and insertion processes. These findings highlight the function-led materials-design approach for the development of sustainable, renewable energy storage technologies. For more details, kindly visit Adv. Funct. Mater. 2025, e13018
