A Non-Woven Network of Porous Nitrogen-doping Carbon Nanofibers as a Binder-free Electrode for Supercapacitors

Recent advancements in metal organic framework based electrodes for supercapacitors

“…The high SSA of 1,757 m 2 g −1 for nanoporous carbon was ascribed to NaOH activation. The electrochemical performance of nanoporous carbon in this article outperformed most of the carbon materials delivered from MOFs that have been previously reported [5,65]. The ASC not only displayed a relatively high specific capacitance of 202.5 F g −1 in 6 mol L −1 KOH electrolyte at 0.5 A g −1 , but also good cyclic stability with greater than 80% capacitance retention after 10,000 cycles (Fig.…”

“…Their unique properties, including high power density, fast charge/discharge rate, long cycle life and environmental friendliness, make supercapacitors attractive devices for a variety of applications in energy storage such as electronic communications, the emergent electric transportation industry and aerospace [1][2][3][4][5][6][7][8][9][10].…”

Electrospun Nanomaterials for Energy Applications: Recent Advances

“…At last, a single-step (calcination) or multi-step post-spinning heat treatment (stabilization and carbonization, sometimes followed by activation) upon different atmospheres (air, inert gases, gas mixture, activating gases) can be necessary to finalize the production process of the various fiber typologies (Figure 3). Polymer fibers do not require any treatment [46,47]; pure (and doped) oxide fibers are obtained by removing the organic component of the precursor(s) via an oxidative process [48][49][50][51], whereas stabilization of the polymer enabling its subsequent processing at higher temperature for graphitization is needed to obtain carbon and composite carbon-based fibers [52][53][54][55][56][57][58]. Activation upon gaseous atmosphere [53] or chemical etching to remove sacrificial templating agents [59] are utilized to enhance the fiber porosity and surface area.…”

“…Table S5 reports some examples of electrode ENMs and their preparation conditions; the main parameters describing their performance are reported in Table S6. PAN [181][182][183][184][185][186][187] or a blend of PAN and PVP [52][53][54]59] is the most frequently utilized polymeric component of the spinnable solution, whereas N,N-dimethylformamide (DMF) commonly acts as a solvent [52][53][54]59,[181][182][183][184][185][186][187]. A variety of different additives is employed to generate carbon fibers with specific textural, compositional, or conductive properties [46,47,59,178,[182][183][184][185][186][187].…”

“…By the use of a blend of PAN and PVP dissolved in DMF, Li et al [54] have obtained non-woven membranes consisting of porous nitrogen-doped carbon fibers, whose porosity and nitrogen-content can be easily controlled by adjusting the relative-to-PAN PVP content (150-240/100 wt%/wt%) of the solution. As binder-free electrodes, the membranes are able to deliver specific capacitance of 148-198 F/g and exhibit excellent cyclic stability with a retention rate of 104% after 5000 cycles at a rate of 1 A/g [54].…”