Electrodes based on nano-tree-like vanadium nitride and carbon nanotubes for micro-supercapacitors

Performance evaluation of a low-cost, novel vanadium nitride xerogel (VNXG) as a platinum-free electrocatalyst for dye-sensitized solar cells

“…Moreover, at a lower binding energy of 396.1 eV, the N-X peak was found, which denotes the nitrogen substitution of oxygen in the V y O x layer. 50 The above-mentioned XPS results of VNXG are consistent with the previous reports on VN, which supports the formation of vanadium nitride. [51][52][53] The obtained VN xerogel presented interconnected crosslinked clusters of particles, which is believed to possess large surface area and excellent porosity.…”

Electrochemical Stability Enhancement in Reactive Magnetron Sputtered VN Films upon Annealing Treatment

“…Another study reported a reduction in areal capacitance by~80% within first 100 cycles, when tested for 1000 cycles in 1 M KOH solution [2]. Although cycle life stability is generally assessed in KOH electrolyte solution, it is also performed in mild K 2 SO 4 solution due to the relatively slow rate of decay in the EC capacitance value [13,14]. We recently reported the electrochemical properties of VN/CNT hybrid nanostructures for micro-capacitors, using potassium sulphate (K 2 SO 4 ) electrolyte [13].…”

“…Although cycle life stability is generally assessed in KOH electrolyte solution, it is also performed in mild K 2 SO 4 solution due to the relatively slow rate of decay in the EC capacitance value [13,14]. We recently reported the electrochemical properties of VN/CNT hybrid nanostructures for micro-capacitors, using potassium sulphate (K 2 SO 4 ) electrolyte [13]. Furthermore, we suggested the preservation of the surface oxide layer for enhanced VN film stability during cycling.…”

Homogeneous Fe2O3 coatings on carbon nanotube structures for supercapacitors

“…37.5 mF cm −2 for DC-sputtered vanadium nitrate on VACNTs. 46 Extremely high areal capacitance values have been obtained using asymmetric supercapacitors with binary metal sulfides and polypyrrole on VACNTs (3.3 F cm −2 ). 47 By analyzing the morphology and thickness of the iron oxide coating from SEM and TEM images, the mass loading of our samples was estimated to be 30-160 μg cm −2 , depending on the thickness.…”