An Overview of Recent Advancements in Conducting Polymer–Metal Oxide Nanocomposites for Supercapacitor Application

Abstract

Supercapacitors have gained significant attention as energy storage devices due to their high specific power, fast charge–discharge rate and extended cycling stability. Recent research focuses on the search for new electrode materials to enhance the specific capacitance of supercapacitors. Conducting polymers (CPs) and metal oxides (MOs) are being extensively tested as electrode materials in supercapacitors. CPs have poor cycling stability and low mechanical strength but are easy to process, while MOs exhibit easy availability, variable oxidation states and possess high specific capacitance, but they are somewhat difficult to process. Therefore, combining both (CP) and (MO) in a composite offers better results for the electrochemical performance of supercapacitors. This review mainly focuses on the discussion of CP/MO based nanocomposites recently reported for supercapacitor applications. The collective information presented in this report will provide researchers a view into the latest developments in this field. The continued research on this topic will reveal further potential applications of CP/MO composites.

Synthesis and electrochemical testing of novel doped polyaniline and biomass‐derived carbon‐based composite for supercapacitors

“…The specific capacitances of components of composite (PSAC and PANI) and composite (PSAC/PANI) evaluated using Equation (1) in Appendix S1 from CV are shown in Table 1. High specific capacitance values are observed at low scan rates as electrolyte ions get sufficient time for the redox processes to occur 26 . It reveals the highest specific capacitance for PSAC (473 and 1145 F g −1 ) and lowest specific capacitance for PANI (81 and 155 F g −1 ) on both substrates.…”

“…The Electrochemical double‐layer capacitors (EDLCs) rely on ion adsorption at the interface between the electrolyte and the electrode while pseudocapacitors depend on quick and reversible surface redox processes. However, hybrid SCs involve combined mechanisms of both EDLC and pseudocapacitors 4–6 . Although, EDLC materials like carbons deliver reliable cycling stability and high power density but they suffer from poor capacitances 7 .…”

A Review on the Use of Metal Oxide-Based Nanocomposites for the Remediation of Organics-Contaminated Water via Photocatalysis: Fundamentals, Bibliometric Study and Recent Advances

“…The properties of the combination of CPs with metal oxide gave origin to a variety of applications in nanotechnology, such as in the development of sensors, supercapacitors, solar cells, organic electronic devices and new efficient photocatalysts materials for the remediation of aqueous environments polluted by organics [ 142 ].…”

Enhanced efficiency of photocatalytically synthesised Co3+/Co2+-incorporated CeO2/SnO2 nanocomposite and supercapacitor studies

“…The hunt for novel electrode materials to improve the specific capacitance of supercapacitors has been a focus of recent research. 21 Global demand for energy and associated devices is expanding, with high-efficiency energy storage device requirements increasing dramatically. As a result, there is much interest in finding possible answers to the energy dilemma, and much research has been conducted to that end.…”