3D Printing of Monoliths Using TIFSIX-Ni-Based Formulations for the Electric Swing Adsorption of CO₂

The hybrid ultraporous material TIFSIX-Ni ([Ni(pyrazine) 2 (TiF 6 )] n ) was incorporated into a composite ink for the first time for the three-dimensional (3D) printing of monoliths. The large-scale synthesis of TIFSIX-Ni was completed using two different Ni(II) salts, with CO 2 uptakes of 1.90 mmol g –1 achieved using mechanochemically assisted thermal synthesis. The monoliths were then tested for the capture and release of CO 2 gas using electric swing adsorption (ESA) under dry and humid conditions. A working capacity of 1.7% was achieved (comparing dynamic data with isotherm data) when a current of 2.1 A was applied for 10 min. The monolith could be cycled repeatedly for 6 h without impacting the performance of the material or loss of capacity. Part of this work explored the improvement of mechanochemically assisted synthetic methods of TIFISX-Ni in reducing the costs associated with large-scale production, allowing for improvements in the overall scale-up and processability of the material for industrial applications.