The outstanding electrical and mechanical properties remain elusive on macroscopic carbon nanotube (CNT) films because of the difficult material process, which limits their wide practical applications. Herein, we report high-performance multifunctional MWCNT films that possess the specific electrical conductivity of metals as well as high strength. These MWCNT films were synthesized by a floating chemical vapor deposition method, purified at high temperature and treated with concentrated HCl, and then densified due to the developed chlorosulfonic acid-enhanced zipping effect. These large scalable films exhibit high electromagnetic interference shielding efficiency, high thermoelectric power factor, and high ampacity because of the densely packed crystalline structure of MWCNTs, which are promising for practical applications.

由于困难的材料加工过程，宏观碳纳米管（CNT）薄膜的出色电气和机械性能仍然难以捉摸，这限制了它们的广泛实际应用。在此，我们报告了具有金属特定导电性和高强度的高性能多功能 MWCNT 薄膜。这些 MWCNT 薄膜通过浮动化学气相沉积法合成，在高温下纯化并用浓 HCl 处理，然后由于氯磺酸增强的拉链效应而致密化。由于多壁碳纳米管的致密晶体结构，这些大尺寸可缩放薄膜表现出高电磁干扰屏蔽效率、高热电功率因数和高载流量，具有实际应用前景。