Abstract
AbstractA two-step polyaniline (PANI) loading procedure has been developed to produce polyelectrolyte complex composite membranes (CPECs) to be used as supercapacitor electrodes. In the first step, CPECs were prepared by co-precipitation of poly(styrene sulfonate) (PSS) and poly(diallyldimethylammonium chloride) (PDADMAC) mixed with various amounts of PANI as a filler. CPECs were formed by compression molding into 100 micron membranes using NaCl as a plasticizer and characterized for their electrochemical properties. In the second step, the highest capacitance CPEC membranes with 60% PANI loading were further modified and doped by crossflow polymerization of aniline through the composite membranes. By using a two-compartment crossflow reactor containing aniline and ammonium persulfate on each side, the PANI content of the composite membrane was further increased. Cyclic voltammetry showed a doubling in the capacitance of the membranes after the crossflow polymerization. The resulting electrodes were flexible with high capacitance and could be used to improve pseudocapacitor performance.
Highlights
Much effort has been devoted to the development of supercapacitors (SCs) as lightweight and flexible energyAmong all possible polymeric materials that can be used as electrode matrix, polyelectrolyte complex membranes (PECs) have surprisingly received little attention.This work is licensed under the CreativeTwo-step PANI loading in polyelectrolyte complex membranes 195The oppositely charged water-soluble polyelectrolyte can form a complex when mixed in solution and produce an insoluble polymer matrix
Schlenoff et al reported that PEC membranes have relatively high ion diffusion coefficient because of their high free volume leading to high ion mobility [11]
The flexibility of the PANI composite PEC was found to decrease when the PANI weight fraction was increased above 60%, leading to brittle and unusable membranes
Summary
Much effort has been devoted to the development of supercapacitors (SCs) as lightweight and flexible energy. Among all possible polymeric materials that can be used as electrode matrix, polyelectrolyte complex membranes (PECs) have surprisingly received little attention. The oppositely charged water-soluble polyelectrolyte can form a complex when mixed in solution and produce an insoluble polymer matrix. The utilization of PEC as the matrix for PANI immobilization to be used as flexible electroactive membranes is described in this study. The PECs were formed through electrostatic interactions and polymer chain entanglements [12,13] during the co-precipitation of polycationic poly(diallyl dimethyl ammonium chloride) (PDADMAC) and polyanionic poly(styrene sulfonate) (PSS) in solution with various amount of prepolymerized PANI powder. The obtained PANI–composite polyelectrolyte complex membranes (CPECs) were formed using compression molding. 70°C overnight and followed by grinding PANI to obtain fine powder. The pressure used for the compression was 10 tons and held for 2 min at room temperature
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
