School of Materials Science and Engineering , Beijing Institute of Technology , Beijing 100081 , China.
School of Mechanical and Material Engineering , North China University of Technology , Beijing 100144 , China.
ACS Appl Mater Interfaces. 2019 Apr 3;11(13):12535-12543. doi: 10.1021/acsami.9b00593. Epub 2019 Mar 25.
The utilization of electromagnetic (EM) energy neither is affected by the weather nor produces harmful substances. How to utilize and convert EM energy is of practical concern. Herein, delaminated titanium carbide (D-TiCT) MXene nanosheet (NS) was successfully fabricated by the modified Gogotsi's method. The choice of atomic layer processing allows tailoring of layer distance of TiCT so as to improve polarization. High-performance EM wave absorption of D-TiCT MXene NS composites was obtained, and their comprehensive performance is the best of all TiCT-based composites. Due to the competition between conduction loss and polarization loss, the higher the concentration of D-TiCT in composites, the more the conversion of EM energy to thermal energy will be. Based on the mechanism, a prototype of thermoelectric generator is designed, which can convert the EM energy into power energy effectively. This thermoelectric generator will be the energy source for low power electric devices. Our finding will provide new ideas for the utilization of EM energy.
电磁能的利用既不受天气影响，也不产生有害物质。如何利用和转换电磁能是实际关注的问题。在此，通过改进的 Gogotsi 方法成功制备了分层碳化钛 (D-TiCT) MXene 纳米片 (NS)。原子层处理的选择允许调整 TiCT 的层间距，以提高极化度。获得了 D-TiCT MXene NS 复合材料的高性能电磁波吸收，其综合性能是所有基于 TiCT 的复合材料中最好的。由于传导损耗和极化损耗的竞争，复合材料中 D-TiCT 的浓度越高，电磁能向热能的转化就越多。基于这一机制，设计了一种热电发电机原型，可将电磁能有效地转化为电能。这种热电发电机将成为低功率电子设备的能源。我们的发现将为电磁能的利用提供新的思路。
