Anisotropic electromagnetic wave absorption performance of Polyimide/multi-walled carbon nanotubes composite aerogels with aligned slit-like channels structure

Anisotropic Polyimide/Cellulose Nanofibril Composite Aerogels for Thermal Insulation and Flame Retardancy

“…29 Hence, such structure and property differences between axial and radial directions of anisotropic aerogel materials provide promising candidates for microelectronics, thermal insulation, and electromagnetic interference shielding applications. 27,29,32,40 Nanofillers with low thermal conductivity such as silica, 11,13 glass fiber, 41 cellulose nanocrystal, 42 attapulgite, 43 and halloysite 44 are also incorporated to facilely fabricate heatinsulated PI composite aerogels. However, maintaining low shrinkage and tuning pore morphology remain a recurring challenge in such an area.…”

“…Compared with the isotropic structure, anisotropic morphology endows aerogel materials with directional performance such as mass, heat, and electricity transfer. , Wood aerogels exhibit more excellent compression elasticity and lower thermal conductivity along the radial direction. , PI/graphene aerogels obtained by unidirectional freeze drying present higher electrical conductivity along the radial direction . Hence, such structure and property differences between axial and radial directions of anisotropic aerogel materials provide promising candidates for microelectronics, thermal insulation, and electromagnetic interference shielding applications. ,,, …”

Hierarchical Co/CoO/FeO/C nanocomplex derived from Co(OH)2@NH2-MIL-88 to aid highly efficient microwave absorption

“…The RL curves of Co/CoO/FeO/C-600 nanocomplex (as effective reference parameters for evaluating MA) were calculated based on the relative complex permittivity and permeability according to the transmission-line theory. 40 Notably, an RL value of −10 dB is supposed to be the threshold for effective MA. Frequency-dependent two-dimensional (2D) RL curves and 3D RL mapping of Co/CoO/FeO/C-600 are displayed in Fig.…”

Role of Different Catalysts on a Direct Growth Carbon Nanotube for Supercapacitor Electrodes

“…EDLC use carbon-based electrodes, achieving the charge-stored mechanism electrostatically in the Helmholtz layer (non faradic). Pseudocapacitors use metal oxides or conducting polymer electrodes, achieving the charge-stored mechanism electrochemically in faradic electron transfer. , Carbon substances like carbon nanotubes (CNTs), single-walled CNTs, multi-walled CNTs, activated carbon, graphene, carbon aero gel, and so forth are now widely used in energy storage, catalysis, chemical sensing, and portable electronics applications. − Of these, CNTs exhibit great potential for applications in energy storage fields, because of chemical, electronic, mechanical, and optical nature. It is also most efficient for electrochemical applications, as it is a very strong material with low weight, flexibility, and high conductivity. , Many techniques are there to synthesize CNTs, like arc discharge, laser ablation, chemical vapor deposition (CVD), and so forth.…”