Preparation and electrochemical performance of Convolvulus arvensis-derived activated carbon for symmetric supercapacitors

Ahmad, Tauqir; Murtaza,; Shah, Syed Shaheen; Khan, Sardaraz; Khan, Abid; Ullah, Nisar; Oyama, Munetaka; Aziz, Md. Abdul

doi:10.1016/j.mseb.2023.116430

Cited by 17 publications

(8 citation statements)

References 68 publications

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“…transforming these into high-surface-area ACs through processes like carbonization and activation [132,134]. These biomass-derived ACs offer a sustainable, cost-effective, and eco-friendly approach to electrode fabrication, exhibiting excellent electrochemical properties due to their intrinsic porous structures and high surface areas, which are imperative for efficient ion adsorption and rapid charge-discharge dynamics [152,153] [98,160,161]. The pseudocapacitive behavior of conductive polymers arises from the fast and reversible Faradaic reactions at the polymerelectrolyte interface, which contribute to higher specific capacitances compared to their carbon-based counterparts.…”

Section: As Shown Inmentioning

confidence: 99%

Properties of Electrode Materials and Electrolytes in Supercapacitor Technology

Shah,

Aziz

2024

JCE

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This thorough review article offers a cutting-edge analysis of the essential characteristics and developments in electrode materials and electrolytes for supercapacitor technology. We start by going over the basics of supercapacitors and how important characterization methods like electrochemical impedance spectroscopy, galvanostatic charge-discharge, and cyclic voltammetry work. Specific capacitance, energy, and power densities, three essential characteristics that are crucial for assessing supercapacitor performance, are carefully covered in this work. We also analyze the many kinds of capacitors, including hybrid supercapacitors, electric double-layer capacitors, pseudocapacitors, and supercapacitors, and explain their working principles and material-specific characteristics. The study highlights the importance of metal oxides and hydroxides, carbon-based materials, conductive polymers, and novel and hybrid materials such as MXenes and metal-organic frameworks. The special qualities of each material class, such as large surface area, electrical conductivity, and particular redox properties, are highlighted in this section. These qualities are crucial for maximizing the performance of supercapacitors. The topic of electrode materials is discussed in detail, including their benefits and the difficulties and chances to improve energy storage, stability, and affordability. Parallel to this, the study thoroughly examines various electrolyte kinds, a sometimes overlooked yet essential part of supercapacitor technology. Discussed include ionic conductivity, operating voltage windows, safety profiles, and electrochemical stability of aqueous, organic, ionic liquid, gel, and solid-state electrolytes. This paper highlights the relationship between supercapacitor performance and electrolyte type, explaining how electrolyte selection affects total energy density, power density, and operational longevity. This review article covers supercapacitor technology in detail and with a wide scope and is an invaluable resource. It is a fundamental work for scholars and practitioners new to the area. It offers sophisticated insights that may encourage creativity and application-specific advancement in this quickly changing field. The study presents a comprehensive analysis of the present and future developments in supercapacitor materials and technology, establishing it as a vital resource in the continuous search for cutting-edge energy storage solutions.

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Section: As Shown Inmentioning

confidence: 99%

Properties of Electrode Materials and Electrolytes in Supercapacitor Technology

Shah,

Aziz

2024

JCE

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“…Then, the energy density was estimated and compared with the studies about energy storing devices [Figure 6D]. The higher values of energy densities calculated at the current density of 0.2 A/g were up to 73.36 Wh/kg, higher than those supercapacitors assembled with pure or modified carbon [45,[55][56][57][58][59][60] . Meanwhile, the assembled supercapacitor conducted the CGD test for 10,000 cycles, and the capacitance could maintain a retention rate of 82.49% with a gradual decrease trend [Figure 6E].…”

Section: The Supercapacitive Properties Of Macmentioning

confidence: 99%

CoFe₂O₄ nanoparticles as a bifunctional agent on activated porous carbon for battery-type asymmetrical supercapacitor

Qu,

Chen,

Sun

et al. 2024

Chem Synth

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The low performance of electrode materials is the main obstacle limiting the development of the supercapacitor industry, which can be solved by doping cobalt ferrate nanoparticles (NPs) with carbon materials. Herein, the composites of CoFe2O4 based on activated carbon (AC) were successfully prepared using a one-step solvothermal method and subsequently applied in anodes of battery-type asymmetrical supercapacitors. The effect of solvothermal temperature and heating time on the composite characteristic was systematically evaluated. The electrochemical analysis in the three-electrode system revealed that modified activated carbon heated at 140 °C for 24 h (140MAC24) displayed excellent specific capacitance of 571.36 F/g at the current density of 0.2 A/g due to the synergistic effect of the double-layer and faradic capacitance. Moreover, iron and cobalt elements in CoFe2O4 could change into the oxide form to accelerate charge in potential range window of -1.0 to -0.2 V and discharge from -0.2 to 0.2 V, respectively. Meanwhile, the result of assessing economic feasibility suggested the splendid availability of 140MAC24 electrodes. Additionally, the assembled supercapacitor displayed the outstanding specific capacitance of 171.31 F/g in the potential window of 1.8 V, energy density of 43.5 Wh/kg at the current density of 0.2 A/g, and capacitance retention rate of 82.49% after 10,000 cycles. The excellent electrochemical properties demonstrated that CoFe2O4 could be used as a bifunctional agent for enhancing supercapacitive performance.

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“…This new form of electrocatalyst is not only applicable to ZABs; it is also highly recommended for supercapacitors. [191,192] Ishihara et al [193] developed a distinctive methodology to prepare a mesoporous MnCo 2 O 4 spinel with the aim of producing a lengthy capacitive ZAB for mobile applications. The hard template method was employed utilising silica (mesoporous) as a means to fabricate a hard template.…”

Section: Mnco 2 Omentioning

confidence: 99%

“…Figure 10(b) shows the synthetic pathway of the MCO/CNFs@NC composite, which manifested the hybrid catalyst‘s superior OER and ORR capabilities. This new form of electrocatalyst is not only applicable to ZABs; it is also highly recommended for supercapacitors [191,192] . Ishihara et al [193] .…”

Section: Cobalt Oxide‐based Materials As Bifunctional Electrocatalyst...mentioning

confidence: 99%

Cobalt Oxide‐Based Electrocatalysts with Bifunctionality for High‐Performing Rechargeable Zinc‐Air Batteries

Saha,

Shaheen Shah,

Ali

et al. 2023

The Chemical Record

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In recent years, the rapid growth in renewable energy applications has created a significant demand for efficient energy storage solutions on a large scale. Among the various options, rechargeable zinc‐air batteries (ZABs) have emerged as an appealing choice in green energy storage technology due to their higher energy density, sustainability, and cost‐effectiveness. Regarding this fact, a spotlight is shaded on air electrode for constructing high‐performance ZABs. Cobalt oxide‐based electrocatalysts on the air electrode have gained significant attention due to their extraordinary features. Particularly, exploration and integration of bifunctional behavior for energy storage has remarkably promoted both ORR and OER to facilitate the overall performance of the battery. The plot of this review is forwarded towards in‐depth analysis of the latest advancements in electrocatalysts that are based on cobalt oxide and possess bifunctional properties along with an introduction of the fundamental aspects of ZABs, Additionally, the topic entails an examination of the morphological variations and mechanistic details mentioning about the synthesis processes. Finally, a direction is provided for future research endeavors through addressing the challenges and prospects in the advancement of next‐generation bifunctional electrocatalysts to empower high‐performing ZABs with bifunctional cobalt oxide.

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Preparation and electrochemical performance of Convolvulus arvensis-derived activated carbon for symmetric supercapacitors

Cited by 17 publications

References 68 publications

Properties of Electrode Materials and Electrolytes in Supercapacitor Technology

Properties of Electrode Materials and Electrolytes in Supercapacitor Technology

CoFe₂O₄ nanoparticles as a bifunctional agent on activated porous carbon for battery-type asymmetrical supercapacitor

Cobalt Oxide‐Based Electrocatalysts with Bifunctionality for High‐Performing Rechargeable Zinc‐Air Batteries

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Preparation and electrochemical performance of Convolvulus arvensis-derived activated carbon for symmetric supercapacitors

Cited by 17 publications

References 68 publications

Properties of Electrode Materials and Electrolytes in Supercapacitor Technology

Properties of Electrode Materials and Electrolytes in Supercapacitor Technology

CoFe2O4 nanoparticles as a bifunctional agent on activated porous carbon for battery-type asymmetrical supercapacitor

Cobalt Oxide‐Based Electrocatalysts with Bifunctionality for High‐Performing Rechargeable Zinc‐Air Batteries

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CoFe₂O₄ nanoparticles as a bifunctional agent on activated porous carbon for battery-type asymmetrical supercapacitor