@article{Li2025, 
author = {Tianshuo Li and Mengke Qiao and Fu Chen and Xiangcheng Li},
title = {Electrostatic self-assembled CS/Ti3C2Tx/Co@CNT composites with gradient carbon structure and wideband microwave absorption},
year = {2025},
journal = {Nano Research},
volume = {18},
number = {9},
pages = {94907696},
keywords = {Ti3C2Tx MXene, carbon nanotubes (CNTs), dimensional distribution, microwave absorption, dielectric loss},
url = {https://www.sciopen.com/article/10.26599/NR.2025.94907696},
doi = {10.26599/NR.2025.94907696},
abstract = {Two-dimensional MXene absorbing materials with excellent electrical conductivity and abundant surface functional groups make it potentially application in electromagnetic compatibility (EMC) for 5G communication and integrated circuit chip. However, the impedance mismatch caused by high conductivity would deteriorate the electromagnetic wave absorption performance of MXenes. In this work, a lightweight electromagnetic wave-absorbing material of CS/Ti3C2Tx/Co@CNTs with a gradient-dimensional structure was prepared using the positive-negative charge self-assembly method. The results shown that the heterogeneous interfaces of Co-CNTs, CNT-Ti3C2Tx and Ti3C2Tx-CS could be formed. At the same time, the porous network of carbon skeleton effectively reduces the density of Ti3C2Tx and generates the cobalt-CNTs structure, which ultimately improves the surface impedance of Ti3C2Tx. Therefore, CS/Ti3C2Tx/Co@CNTs composite could obtain the minimum reflection loss (RLmin) of −55.01 dB at the thickness of 3.4 mm and the effective absorption bandwidth (EAB) could reach 9.07 GHz. It should be emphasized that the average density of CS/Ti3C2Tx/Co@CNTs is only 0.03 g/cm3. The electrostatic self-assembled CS/Ti3C2Tx/Co@CNT composites behaved the excellent conductive loss, polar loss and the impedance matching. This work provides valuable insights into the exploration of lightweight wave-absorbing materials covering ultra-wide bands.}
}