3D Porous Compact 1D/2D Fe₂O₃/MXene Composite Aerogel Film Electrodes for All‐Solid‐State Supercapacitors

Abstract

The data that support the findings of this study are available from the corresponding author upon reasonable request.

Regulating Functional Groups Enhances the Performance of Flexible Microporous MXene/Bacterial Cellulose Electrodes in Supercapacitors

“…The obtained powder was then selectively etched with HCl and LiF to remove the Al atomic layer, resulting in Ti 3 C 2 T x MXene with a 2D structure, as described in our previous reports. 4 Specifically, 2 g of LiF powder was dissolved in 20 mL of 9 M HCl solution to obtain the etchant mixture. Then 1 g of Ti 3 AlC 2 powder was slowly dispersed into the above solution while stirring vigorously at 35 °C for 24 h. After that, the collected sediment was centrifuged with ultrapure (UP) water at 3500 rpm for 5 min each time until the pH of the supernatant became neutral.…”

“…The resulting solid was thoroughly pulverized and passed through a 400 mesh to produce the MAX powder. The obtained powder was then selectively etched with HCl and LiF to remove the Al atomic layer, resulting in Ti 3 C 2 T x MXene with a 2D structure, as described in our previous reports . Specifically, 2 g of LiF powder was dissolved in 20 mL of 9 M HCl solution to obtain the etchant mixture.…”

“…1−3 They have attracted considerable attention for supercapacitor (SC) applications due to their strong hydrophilicity, high electrical conductivity, abundant surface functional groups, large specific surface area, and pseudocapacitive properties. 4,5 However, pure MXene flakes presently have limited use in SC applications because 2D materials are susceptible to restacking due to van der Waals forces, which decreases the interlayer spacing and negatively affects surface area and ion transport. Intercalating materials are introduced to minimize restacking by serving as pillars to maintain greater separation between the MXene flakes.…”

Recent Advances of Flexible MXene and its Composites for Supercapacitors

“…[18] To solve this problem and enhance the performance of MXenes, several structural design and construction strategies have been proposed, such as doping or utilizing surface groups for modification, constructing porous structures, and compositing MXene with other electrode materials. [14,19,20] However, the electrodes obtained by different strategies suffer different degrees of loss of mechanical flexibility or electrical conductivity. Therefore, it is necessary to design the electrode structure reasonably to ensure its electrochemical performance while considering its mechanical flexibility, so that it can be used as a freestanding self-supporting flexible electrode.…”

Hybrid Aerogel Triboelectric Nanogenerator Based on the Synergistic Effect of Solid–Solid/Gas–Solid Triboelectricity and Piezoelectric Polarization

“…Aerogel, the lightest solid in the world, provided merits such as high porosity, ultra-low density, and high specific surface area. In recent years, aerogels have been attracting wide attention in flexible/wearable electronic materials because the unique 3D structure of conductive aerogels can provide a conductive framework and can offer excellent electrical performance for flexible electronics such as piezoresistive sensors, − supercapacitors, − TENGs, − and other energy collection devices . The flexible aerogel with compressible 3D porous network structure will have more conductive paths in the aerogel under the effect of external pressure, so that the resistance of aerogel can be adjusted in real time.…”