Robust Single‐Walled Carbon Nanotube‐Infiltrated Carbon Fiber Electrodes for Structural Supercapacitors: from Reductive Dissolution to High Performance Devices

Multifunctional electrodes for structural supercapacitors are prepared by vacuum infiltration of single-walled carbon nanotubes (SWCNTs) into woven fibers (CFs); the use reductive charging chemistry to form nanotubide solutions ensured a high degree individualization. The route is highly versatile, as shown comparing four different commercial nanotube feedstocks. In film form, pure networks (“buckypapers”) conductive (up 2000 S cm−1) with surface area (>1000 m2 g−1) and great electrochemical performance (capacitance 101 F g−1, energy density 27.5 Wh kg−1 power 135 kW kg−1). Uniformly integrating these SWCNT throughout CF fabrics significantly increased electrical conductivity 318 cm−1), 196 g−1), in-plane shear properties, all simultaneously. CNT-infiltrated CFs exhibited intrinsically specific (2.6–4.2 kg−1) (6.0–8.7 densities in 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMIM TFSI) electrolyte. based on CNT-coated offer substantial increase capacitive while maintaining tensile mechanical properties as-received CF-based composite. This non-damaging approach modify graphitic, nanocarbons provides new storage systems.