Recent Progress in Carbonaceous and Redox‐Active Nanoarchitectures for Hybrid Supercapacitors: Performance Evaluation, Challenges, and Future Prospects

Abstract

Due to advancements in technology, the energy demand is becoming more intense with time. The rapid fossil fuels consumption and environmental concerns triggered intensive research for alternative renewable energy resources, including sunlight and wind. Yet, due to their time‐dependent operations, significant electric energy storage systems are required to store substantial energy. In this regard, electrochemical energy storage devices, like batteries and supercapacitors (SCs), have recently attracted much research attention. Recent developments in SCs demonstrated that hybrid SCs (HSCs), which combine the excellent properties of batteries and SCs, increase the specific energy, specific power, specific capacitance, and life span. Carbonaceous and redox‐active materials have been explored as efficient electrode materials for applications in HSCs, ultimately enhancing their electrochemical performances. The HSCs performance significantly depends on the porosity, specific surface area, and conductivity of the electrode materials. This review article gives an overview of recent advances in developing HSCs with high specific power, specific energy, and long cyclic‐life. The fabrication of various HSCs materials using carbonaceous and redox‐active nanoarchitectures and their characterization are explored in‐depth, including electrode development, basic principles, and device engineering. A proper investigation has been conducted regarding state‐of‐the‐art materials as HSC electrodes. This review focuses on the most up‐to‐date, cutting‐edge, electrode materials for HSCs and their performance. The possibilities for novel electrode materials and their impact on the HSCs performance for future energy storage are also discussed.

Carbon Nanosheets‐Based Supercapacitor Materials: Recent Advances and Prospects

“…The chemistry of CNS is undoubtedly unique and vibrant. [2][3][4][5]6] Its special structural features as discussed above (Schemes 1 and 2) are scrutinized with state-of-the-art physical techniques. [20,26,33,41,[59][60][61] These characterizations provide us a clear view about CNS.…”

“…Enormous efforts have been undertaken to resolve this issue and hence significant progress has been achieved in recent years. [2][3][4][5]6] The amount of energy stored by a supercapacitor can be determined as: E ¼ (OPW) of supercapacitors. Energy parameter is proportional to the square of OPW as well as inherent C of an electrode/ electrolyte system.…”

“…For example, the carbonaceous materials-based electrode exhibits a high OPW and thus carbon-based electrode materials seem to be more favorable in enhancing the energy density of supercapacitors. [3,6] The second controlling parameter of energy density of supercapacitors is capacitance, C that can be tuned by two charge storage pathways. In fact, the supercapacitors are basically named after these charge storage mechanisms: (i) electrical double layer capacitor (EDLC), where charges are electrostatically accumulated at the electrode/electrolyte Suhrid Sayantha Aniv is currently pursuing a MS degree in Department of Chemistry at the University of Dhaka.…”

Gadolinium doped zinc ferrite nanoarchitecture reinforced with a carbonaceous matrix: a novel hybrid material for next-generation flexible capacitors

“…This is because both capacitive and redox-active constituents of the working electrode synergistically act to boost the overall performance of HCs. 11,12…”

Recent Advances on Nitrogen‐Doped Porous Carbons Towards Electrochemical Supercapacitor Applications

“…[3] Among several different renewable energy storage systems, [4] electrochemical energy storage approach has gained significant attraction due to many advantages, such as high energy density and efficiency, reasonable cost, enhanced safety, smaller size, flexibility, load-bearing ability, easier fabrication process, and high mechanical strength, which mainly depend on the electrode material used. [5,[6][7][8][9][10][11][12][13][14] The most widely used electrochemical devices include batteries, supercapacitors, and fuel cells. [6] Of these electrochemical devices, the first two are commonly used for typical energy storage applications.…”