Modification of supercapacitor electrodes with polymer metallocomplexes: Methods and results

Abstract

A procedure for electrochemical modification of carbon materials with high specific surface was developed. The materials were modified with polymeric nickel complexes with Schiff bases. The prototype of a hybrid double layer Faraday supercapacitor with a positive carbon electrode modified with a polymeric complex was studied. Modification of this type doubled the energy stored by the hybrid capacitor compared with the similar double layer capacitor.

Atomic and Electronic Structure of Metal–Salen Complexes [M(Salen)], Their Polymers and Composites Based on Them with Carbon Nanostructures: Review of X-ray Spectroscopy Studies

“…To overcome this limitation, a technique of carbon nanomaterial presoaking in a metal-salen monomer's highly concentrated solution is utilized to adsorb the complex both on the surface and in the volume of the pores. This technique was first applied to composites of poly-[Ni(Saltmen)]/porous carbon, poly-[Ni(Salen)]/porous carbon, poly-[Ni(3-CH 3 O-Salen)]/porous carbon [47,115], and subsequently to composites of poly-[Ni(CH 3 -Salen)]/SWCNTs [6] and poly-[Ni(Salen)]/MWCNTs [116]. The prepared material can then be transferred to a low concentration monomer solution or a solution without monomers for electrochemical polymerization.…”

“…Therefore, the X-ray absorption and photoelectron spectroscopy methods are among the most informative experimental techniques for studying the local atomic and electronic structures of various polyatomic systems: molecules, complexes, polymers, etc. However, recent studies are characterized by only separate attempts to use the methods of X-ray core-level photoelectron spectroscopy (XPS) [8,26,35,37,39,40,[42][43][44][45][46][47][48][49][50][51][52] and valence-band photoemission spectroscopy (VB PES) [45,46,53], as well as X-ray absorption spectroscopy (near-edge X-ray absorption fine structure, NEXAFS, and extended X-ray absorption fine structure, EXAFS) [27,29,30,40,45,46,[52][53][54][55][56] to obtain information about the features of the electronic structure of [M(Salen)] complexes, their polymers, and composites based on them, as well as about the atomic structure of these polyatomic systems.…”

Modification of Porous Carbon Material with Polymeric Cobalt Complex with a Schiff Base of Salen-Type for Electrodes of Electrochemical Supercapacitors

“…Polymeric complexes of nickel are successfully used to modify nanoporous carbon materials (they increase the capacity of the positive electrode without detioration capacity of the electric double layer of the carbon material) and are able to undergo multiple charge-discharge cycles without loss of capacity [13][14][15].…”