Comparative Studies on Two-Electrode Symmetric Supercapacitors Based on Polypyrrole:Poly(4-styrenesulfonate) with Different Molecular Weights of Poly(4-styrenesulfonate)

Abstract

Poly(4-styrenesulfonate)-conducting polymer (PSS-CP) is advantageous for thin-film electrode manufacturing due to its high conductivity, high charge storage, structural stability, and excellent ink dispersion. In this work, comparative studies of two-electrode symmetric supercapacitors using Polypyrrole:Poly(4-styrenesulfonate) (PPy:PSS), with different molecular weights (Mw’s) of Poly(4-styrenesulfonate) (PSS) as the electrodes, were performed. PPy:PSS can be easily prepared using a simple solution process that enables the mass production of thin-film electrodes with improved electrical and electrochemical properties. As-prepared PPy:PSS, with different PSS molecular weights, were assembled into two-electrode supercapacitors based on coin cell structures. It was confirmed that the electrical and electrochemical properties of PPy:PSS were improved with increasing PSS molecular weight. The coin cell, using PPy:PSS with a PSS molecular weight of 1.0 × 106 g/mol, exhibited higher areal capacitance (175.3 mF/cm2), higher volumetric capacitance (584.2 F/cm3), and longer cycling stability (86.3% after 5000 cycles) compared to those of PPy:PSS with PSS molecular weights of 2.0 × 105 and 7.0 × 104 g/mol. This work provides an efficient approach for producing cost-effective and miniaturized supercapacitors with high conductivity and high specific capacitance for practical applications in a variety of electronic devices.

Resistive Chemosensors for the Detection of CO Based on Conducting Polymers and Carbon Nanocomposites: A Review

“…The use of CPs, with and without carbon materials, has two disadvantages: poor solubility in common solvents and mechanical instability, especially for PANI, due to changes during the oxidation and reduction reactions occurring during the doping process. One approach to improving solubility is to combine CPs with various hydrophilic polymers (or polyelectrolytes) such as PSS, PAA, PVP, and PEG, resulting in composite solutions such as PANI:PSS, PANI:PEG, PANI:PVP, PEDOT:PSS, and PPy:PSS [ 59 , 60 , 61 , 62 , 63 , 64 ].…”

High-Conductivity, Flexible and Transparent PEDOT:PSS Electrodes for High Performance Semi-Transparent Supercapacitors

“…Having a transparent electrode is especially important for achieving high-performance, semi-transparent electronic devices. Among electrode materials [22][23][24][25], conducting polymer poly (3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is a potential candidate due to its high transparency (over 90%), high conductivity (up to 10 3 S/cm), good flexibility, electrochemical stability, and ease of processing by solution [26][27][28][29][30][31][32][33][34][35][36][37]. Recently, different kinds of PEDOT-based electrodes (such as nanofibrillar PEDOT, micrometer-thick PEDOT paper and free-standing PEDOT:PSS films) have been fabricated and applied successfully onto supercapacitors [38][39][40].…”

Specially Designed Polyaniline/Polypyrrole Ink for a Fully Printed Highly Sensitive pH Microsensor

“…This method is especially suitable to obtain CP suspensions with the ability to form a continuous conductive film as it has been previously reported for PANI 24 , 25 and PPy. 26 − 28 The distinctive feature of this procedure consists of involving electrostatic forces produced between monomers and polyelectrolytes to allow obtaining stable suspensions during the oxidative polymerization. This allows obtaining a controlled size distribution to fulfill one of the most restrictive IJP requirements.…”