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

Thehybrid ultraporous material TIFSIX-Ni ([Ni(pyrazine)(2)(TiF6)] (n) ) was incorporatedinto a composite ink for the first time for the three-dimensional(3D) printing of monoliths. The large-scale synthesis of TIFSIX-Niwas completed using two different Ni(II) salts, with CO2 uptakes of 1.90 mmol g(-1) achieved using mechanochemicallyassisted thermal synthesis. The monoliths were then tested for thecapture and release of CO2 gas using electric swing adsorption(ESA) under dry and humid conditions. A working capacity of 1.7% wasachieved (comparing dynamic data with isotherm data) when a currentof 2.1 A was applied for 10 min. The monolith could be cycled repeatedlyfor 6 h without impacting the performance of the material or lossof capacity. Part of this work explored the improvement of mechanochemicallyassisted synthetic methods of TIFISX-Ni in reducing the costs associatedwith large-scale production, allowing for improvements in the overallscale-up and processability of the material for industrial applications.