Clipping electron transport and polarization relaxation of Ti3C2Tx based nanocomposites towards multifunction

High-performance multifunctional electromagnetic (EM) materials exhibit great potential for development, and have attracted extensive attention from the scientific field. Generally, the dielectric genes, including conductive networks, interfaces, and defects, are the pivotal factors that determine their performance. Herein, multifunctional Ti3C2Tx@polyaniline decorated MWCNT (TPMC) nanocomposites, containing generous dielectric genes, were synthesized via the electrostatic self-assembly method. Thanks to the regulation of internal dielectric genes, TPMC exhibited a tunable EM wave absorption (EMA) and EM interference (EMI) shielding performance. TPMC achieved a maximum reflection loss (RL) of -54.7 dB and an effective absorption bandwidth (EAB) of nearly 6 GHz at 1.5 mm. Moreover, the complete conductive networks endowed TPMC with a reliable EMI shielding capability. It exhibited a maximum EMI shielding effectiveness (SE) of 34 dB, and meanwhile, displayed an absorption-dominated green shielding performance. Furthermore, owing to the integration of the genes, TPMC showed a high coulomb efficiency (similar to 98%) and excellent cycling stability (exceeded 95% retation after 8000 cycles), indicating a great potential as outstanding supercapacitor electrode material. This work provides a promising strategy for controlling the EM pollution and alleviating the energy issues.

Automated summary

High-performance multifunctional electromagnetic materials with adjustable electromagnetic wave absorption and interference shielding performance have been developed through internal gene regulation. This research provides a promising strategy for controlling electromagnetic pollution and alleviating energy issues.