Thermogravimetric analysis (TGA) was performed to examine the thermal stability of the COF. The precursors show much pronounced weight loss and is almost completely decomposed when compared to the COF. The HAT-DAB COF undergoes a decomposition of ~53 % at 800 °C, which is impressive and higher than some other related COFs (Figure ). The Raman spectrum show characteristic D and G bands at 1365 cm -1 and 1522 cm respectively which is in accordance with the similar kind of COFs. The D bands correspond to the sp 3 and bent sp 2 characteristics of the COF. The G band is assigned to the out of phase bending of the sp 2 carbons in the framework (Figure ). Field emission scanning electron microscopy (FE-SEM) images show that the COF forms cluster-like aggregations (Figure and). The Transmission Electron Microscopy (TEM) image confirms layered structure of the HAT-DAB COF (Figure ). High angle annular dark field-Scanning Transmission Electron Microscopy (HAADF-STEM) and corresponding electron energy loss spectroscopy (EELS) analysis (Figure ) shows even distribution of carbon and nitrogen in the framework along with negligible amount of oxygen which is most likely due to entrapped NMP solvent molecules in the framework. The HAT-DAB COF was tested to demonstrate their electrochemical performance as the cathode with lithium metal chip as an anode in 2032 coin cell. A cyclic voltammetry (CV) scan was initially performed over a voltage range of 1-4 V (Figure ) to determine the operational window of the cell. It was observed that the lower potential range predominantly contributed to charge polarization though electrical double layer capacitance (EDLC).