Bifunctional Ti3C2Tx–CNT/PANI composite with excellent electromagnetic shielding and supercapacitive performance

Ti 3 C 2 T x exhibits excellent electromagnetic (EM) shielding and electrochemical properties . However, the inherent re-stacking tendency and easy oxidation of Ti 3 C 2 T x limit its further application. In this study, a multi-walled carbon nanotube/polyaniline composite (CNT/PANI, denoted as C –P) was introduced into Ti 3 C 2 T x nanosheets to obtain a Ti 3 C 2 T x –CNT/PANI composite (T@CP). Owing to the integrated effects of Ti 3 C 2 T x and C –P, the contribution of absorption was significantly improved, which finally enhanced the EM shielding performance of T@CP. The highest total EM shielding effectiveness ( SE T ) was close to 50 dB (49.8 dB), which was substantially higher than that of pure Ti 3 C 2 T x (45.3 dB). Moreover, T@CP demonstrated outstanding supercapacitive performance. The specific capacitance of T@CP (2134.5 mF/cm 2 at 2 mV/s) was considerably higher than that of pure Ti 3 C 2 T x (414.3 mF/cm 2 at 2 mV/s). These findings provide a new route for the development of high-efficiency Ti 3 C 2 T x -based bifunctional EM shielding and electrochemical materials.