Promising\nTi₃C₂T<i>_x</i> MXene/Ni\nChain Hybrid with Excellent Electromagnetic\nWave Absorption and Shielding Capacity

Abstract

Electromagnetic\n(EM) pollution affecting people’s normal\nlives and health has attracted considerable attention in the current\nsociety. In this work, a promising EM wave absorption and shielding\nmaterial, MXene/Ni hybrid, composed of one-dimensional Ni nanochains\nand two-dimensional Ti₃C₂T<i>_x</i> nanosheets (MXene), is successfully designed and developed.\nAs expected, excellent EM wave absorption and shielding properties\nare obtained and controlled by only adjusting the MXene content in\nthe hybrid. A minimum reflection loss of −49.9 dB is obtained\nonly with a thickness of 1.75 mm at 11.9 GHz when the MXene content\nis 10 wt %. Upon further increasing the MXene content to 50 wt %,\nthe optimal EM shielding effectiveness (SE) reaches 66.4 dB with an\nabsorption effectiveness (SE_A) of 59.9 dB. Mechanism analysis\nreveals that the excellent EM wave absorption and shielding performances\nof the hybrid are contributed to the synergistic effect of conductive\nMXene and magnetic Ni chains, by which, the dielectric properties\nand electromagnetic loss can be easily controlled to obtain appropriate\nimpedance matching conditions and good EM wave dissipation ability.\nThis work provides a simple but effective route to develop MXene-based\nEM wave absorption and shielding materials. A universal guideline\nfor designing the absorbing and shielding materials for the future\nis also proposed.