High mass loading MnO2/graphite felt electrode with marked stability over a wide potential window of 1.9 V for supercapacitor application

Promoted glucose electrooxidation at Ni(OH)2/graphene layers exfoliated facilely from carbon waste material

“…2A, the calculated specific capacitance ( C s ) of FEGR using eqn (3) is 5.5 mF cm −2 which is greater than the C s of RGR (0.21 mF cm −2 ) by 26 times.where C s is the specific capacitance in F cm −2 , S is the area of the electrode in cm 2 , ∫ I d t is the integrated oxidation or reduction current–potential area divided by the potential scan rate, and Δ V is the operating potential window in V . 21,43…”

“…where C s is the specic capacitance in F cm −2 , S is the area of the electrode in cm 2 , Ð I dt is the integrated oxidation or reduction current-potential area divided by the potential scan rate, and DV is the operating potential window in V. 21,43 The high specic capacitance of the FEGR support is re-ected in, the large adsorption capacity of this large activated electrode's surface to ingest a large number of electrolyte species by supplying a rough surface, a large number of the homogeneous-distributed grooves on the surface of the electrode, in addition to the large produced number of expanded graphene sheets.…”

Effect of graphite concentration on the electrochemical performance of a novel α-MnO2-expanded graphite-PVDF composite cathode material based on FTO substrate

“…The larger tunnel size and high stability of α-MnO 2 is expected to provide fruitful results in the supercapacitive application [18]. Nanoparticles of MnO 2 demonstrated a capacitance of 136 F g −1 , the other structures including 1D needle, nanosheets, nanoflakes, and hierarchical structure demonstrated capacitance of 289 F g −1 , 332 F g −1 , 363 F g −1 , and 260 F g −1 respectively [20,21].…”

“…Several modifications were done by the research society to increment the aforementioned aspects, they started with the incorporation of porous substrates, which yielded the advantages of enhanced energy and power density [22]. Ahmed et al incorporated graphite felt as a substrate due to its 3D porous structure but its application is limited in a commercial sense due to its hydrophobic nature [21]. Chen et al introduced reduced graphene oxide (rGO) for better stability and obtained cycle stability of 100% capacitance retention after 20000 cycles [23], sodium doping for rate performance [24], zinc ion intercalation for high energy storage [25], Ni 2 S 3 for high areal capacitance [26], plasma-activated water for improved ion intercalation [27], and polymer incorporation for high-performance flexible supercapacitors [28].…”

Tailor-designed binary Ni–Cu nano dendrites decorated 3D-carbon felts for efficient glycerol electrooxidation

“…3D Carbon Felt (CF) is used as a substrate for the electrodeposited NiCu nanostructures attributing to its good stability, high specific surface area, low cost, corrosion resistance, high conductivity, and large potential window. 47 Besides, its electrochemical activity can be enhanced by several simple and fast methods (acid treatment, electrochemical treatment, plasma treatment, and thermal treatment). 4,48 Mohamed E. Ghaith et al 4 investigated the impact of electrooxidation of CF either in 1 M sulfuric acid or 1 M sodium hydroxide at different potentials on the performance of the electrodeposition of Ni particles towards glycerol electrooxidation.…”