Polymeric nickel complexes with salen-type ligands for modification of supercapacitor electrodes: impedance studies of charge transfer and storage properties

Nickel‐Salen Type Polymers as Cathode Materials for Rechargeable Lithium Batteries

“…The observed low performance of the unsubstituted polymer poly[Ni(salen)] in all battery tests accords well with the lower transfer rate of charge carriers in poly[Ni(salen)] due to high density of the films it forms and with the lower electronic conductivity of poly[Ni(salen)] compared to substituted polymers . The performance of Li‐ion battery is enhanced by introducing proper substituents in the ligand, like methyl groups in poly[Ni(CH 3 salen)].…”

“…This should facilitate oxidation of the polymer and cause the shift of the onset potential of polymer oxidation to the negative region, as was demonstrated in ref. . In turn, this can potentially facilitate multielectron oxidation process of polymer chains and thus increase the amount of positive charge (the polymer capacity) that can be reversibly stored in the polymer used as a cathode material.…”

“…It was shown that dense globular structures are characteristic of poly[Ni(salen)] and poly[Ni(CH 3 Osalen)] films. On the contrary, poly[Ni(CH 3 salen)] films have porous structure with pores diameter being ≈10 nm and more, clearly visible on scanning electron microscopy (SEM)‐images ( Figure a) of the polymer‐modified electrode.…”

Chirality-sorted carbon nanotube films as high capacity electrode materials

“…activated carbon (22.0 Â 10 À9 cm 2 s À1 ) 73 and polymeric nickel complexes (4.3 Â 10 À7 cm 2 s À1 ). 74 The enhanced diffusion of ions within the material is supposed to decrease the Warburg impedance, 75 which has the positive impact on the power density of the capacitor. 74 The energy storage performance of the all experimental CNT lm formulations was studied in both potentiostatic and galvanostatic modes.…”

Aryl‐Aryl Coupling of Salicylic Aldehydes through Oxidative CH‐activation in Nickel Salen Derivatives

“…NiSalen complexes are known to form oligomers upon anodic oxidation with the formation of C−C bond between the positions para‐ to the hydroxy group (Scheme ) . The method of aryl‐aryl coupling we propose is based on this transformation as a constructive reaction.…”