Journal
CERAMICS INTERNATIONAL
Volume 47, Issue 18, Pages 25531-25540Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.05.277
Keywords
Multi-walled nanotube; Polyaniline; Electromagnetic shielding; Supercapacitance; Ti3C2Tx
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Funding
- National Natural Science Foundation of China [51977009, 11774027, 51132002]
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The study introduced CNT/PANI composite into Ti3C2Tx nanosheets to obtain Ti3C2Tx-CNT/PANI composite, significantly improving the electromagnetic shielding performance. The total electromagnetic shielding effectiveness was close to 50 dB, and the specific capacitance was considerably higher.
Ti3C2Tx exhibits excellent electromagnetic (EM) shielding and electrochemical properties. However, the inherent re-stacking tendency and easy oxidation of Ti3C2Tx limit its further application. In this study, a multi-walled carbon nanotube/polyaniline composite (CNT/PANI, denoted as C-P) was introduced into Ti3C2Tx nanosheets to obtain a Ti3C2Tx-CNT/PANI composite (T@CP). Owing to the integrated effects of Ti3C2Tx 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 (SET) was close to 50 dB (49.8 dB), which was substantially higher than that of pure Ti3C2Tx (45.3 dB). Moreover, T@CP demonstrated outstanding supercapacitive performance. The specific capacitance of T@CP (2134.5 mF/cm2 at 2 mV/s) was considerably higher than that of pure Ti3C2Tx (414.3 mF/cm2 at 2 mV/s). These findings provide a new route for the development of highefficiency Ti3C2Tx-based bifunctional EM shielding and electrochemical materials.
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