Simultaneous cross-linking and pore-forming electrospun carbon nanofibers towards high capacitive performance

Blotting Paper-Derived Activated Porous Carbon/Reduced Graphene Oxide Composite Electrodes for Supercapacitor Applications

“…To determine the composition and chemical state of the elements in GBPC-1, X-ray photoelectron spectroscopy (XPS) testing was used. In Figure 3a, there are three peaks of C1s (284 eV), O1s (532 eV), and N1s (399 eV) of GBPC-1 coexisting [11]. Simultaneously, we did not find Zn element in the XPS survey of GBPC-1, meaning that the Zn element has been removed completely by HCl solution.…”

“…Raman spectroscopy was also used to investigate the disorder of GBPCs. There were two characteristic peaks, one of which was the D-band located at 1340 cm −1 , and the other was the G-band centered at 1589 cm −1 [11]. The degree of amorphization of GBPCs can be evaluated by the intensity ratio of D-band and G-band.…”

“…As the most promising energy storage devices, supercapacitors have become an ever-increasing demand for applications in advanced hybrid powers, energy backups, and pulsed power devices owing to their merits of energy density greater than traditional capacitors and power output higher than conventional batteries [1][2][3][4][5]. On the basis of the electrostatic storage by physical adsorption of electrolyte ions or faradaic redox reactions with the charge-transfer, supercapacitors can be divided into electrical double-layer capacitors (EDLCs) and pseudocapacitors [6][7][8][9][10], both of which have their own advantages: the former possesses a higher power density with an excellent cycling stability [11][12][13], while the latter exhibits a larger energy density but more rapid loss [14][15][16]. To promote the development of supercapacitors, the urgent issue is to design high-performance and low-cost electrode materials [7,[17][18][19].…”

“…With respect to the physical activations using steam or CO 2 , the chemical activations involving KOH, H 3 PO 4 , and ZnCl 2 can give the porous pyrolytic carbon an ultrahigh SSA [8,[39][40][41][42]. However, the activation process significantly destroys the carbon frameworks, which is adverse to the enhancement of power density due to the decline of the electrical conductivity of electrodes [11]. For addressing such a bottleneck, embedding conductive additives into the porous carbon is used for the electrode preparation.…”

Brief overview of electrospun polyacrylonitrile carbon nanofibers: Preparation process with applications and recent trends

“…The recently reported applications of electrospun CNFs related to supercapacitors include the preparation of three‐dimensional (3D) cross‐linked nitrogen‐enriched porous CNFs (C‐CNFs) by electrospinning of polyacrylonitrile/zinc chloride (PAN/ZnCl 2 ) precursor. The C‐CNFs showed a good rate capability of about 60% with current densities ranging from 1 to 60 A g −1 , cycling stability of 97.3% over 60 000 cycles in alkaline electrolyte, and high specific capacitance of 214 F g −1 at 1 A g −1 in acidic electrolyte . In another report, nitrogen‐doped CNFs incorporated with MnCo 2 O 4 nanoparticles were synthesized by carbonizing manganese‐cobalt@PAN nanofibers under N 2 atmosphere.…”