Theories and models of supercapacitors with recent advancements: impact and interpretations

Bharti,; Kumar, Ashwani; Ahmed, Gulzar; Gupta, Manoj; Bocchetta, Patrizia; Adalati, Ravikant; Chandra, Ramesh; Kumar, Yogesh

doi:10.1088/2632-959x/abf8c2

Cited by 45 publications

(16 citation statements)

References 148 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An EDLC comprises two electrolyte-soaked electrodes (made of porous carbon), which are separated by a thin separator. It stores energy through the formation of a nonfaradic electrical double layer (EDL) in the electrode and electrolyte interface through reversible ion adsorption onto the carbon surface. , This arrangement of electrical double-layer pairs separates the countercharges, thereby inducing capacitance between the electrodes. This type of charge-storage mechanism does not involve any faradaic (redox) reaction.…”

Section: Coal-derived Activated Carbon For Electrochemical Energy Sto...mentioning

confidence: 99%

Coal-Derived Activated Carbon for Electrochemical Energy Storage: Status on Supercapacitor, Li-Ion Battery, and Li–S Battery Applications

2021

View full text Add to dashboard Cite

In this era of exponential growth in energy demand and its adverse effect on global warming, electrochemical energy storage systems have been a hot pursuit in both the scientific and industrial communities. In this regard, supercapacitors, Li-ion batteries, and Li–S batteries have evolved as the most plausible storage systems with excellent commercial adaptations. Intending to get the best performance from these systems, researchers all over the world have been engaging to develop various new methods for the synthesis of advanced carbon materials with a target of economical viability, abundance, low cost, and ease of preparation. Among them, activated carbon has proven to be an attractive electrode material due to its many advantageous properties such as a large surface area, high pore density, good conductivity, low cost, and good mechanical and chemical stability compared to other alternatives, such as high-cost graphene, carbon nanotubes, Mxenes, transition metal complexes, and conducting polymers. Among the numerous synthetic and biological resources that are used for the synthesis of activated carbon, coal/coal-like materials have found tremendous importance in recent times due to their relative abundance, extremely low cost, and excellent large-scale production possibilities. The present review attempts to collect all the significant innovations carried out for the use of cheap and economically viable coal-derived/-based activated carbon and its composites in supercapacitors, Li-ion batteries, and Li–S batteries and to critically evaluate their comparative performances. The progress in advanced three-dimensional printing technology for these energy storage applications is also discussed. The highlight of this review is also to assess the challenges that remain for the synthesis of high-performance electroactive-activated carbon materials from coal-based resources as alternative electrode materials, which would become promising candidates in the foreseeable future.

show abstract

Section: Coal-derived Activated Carbon For Electrochemical Energy Sto...mentioning

confidence: 99%

Coal-Derived Activated Carbon for Electrochemical Energy Storage: Status on Supercapacitor, Li-Ion Battery, and Li–S Battery Applications

2021

View full text Add to dashboard Cite

show abstract

“…It is experimentally challenging to analyze the Stern-layer and diffuse-layer capacitance individually. Various numerical simulations have been done to study the behavior of EDLC. − Conway and Pell evaluated the effect of porosity and distribution of interconnected capacitive and Ohmic elements on the behavior of electrochemical capacitors . Yoon et al analyzed the performance of thicker porous electrodes by simulating EDLC using transmission models. , Kaus et al have modeled a complex electrical model to account for the redistribution of ions in supercapacitors .…”

Section: Introductionmentioning

confidence: 99%

Simulation Study of Electric Double-Layer Capacitance of Ordered Carbon Electrodes

Nigam

Kar

2022

Langmuir

View full text Add to dashboard Cite

Supercapacitors are electrochemical energy storage devices having high capacitance, high power density, long cycle life, low cost, easy maintenance, and negligible environmental pollution. The formation of an electric double layer at the electrode–electrolyte interface is mostly responsible for supercapacitors’ energy storage. The simulation study of equilibrium electric double-layer capacitance (EDLC) in 3D arranged mesoporous carbon electrodes with a simple cubic morphology and interdigitated electrodes has been done. Continuum theory has been utilized to study the underlying processes involved in EDLC. Interfacial polarization and ion crowding depend on the electrode’s critical thickness. Porosity increases the capacitance due to the increase in the electrode surface area. The diffuse-layer specific capacitance of ordered mesoporous carbon electrodes in a (C2H5)4NBF4/propylene carbonate organic electrolyte is in the range of 3.2–13.3 μF cm–2, varying according to the electrode thickness. The Stern-layer specific capacitance is 167.6 μF cm–2, and total equilibrium EDLC is in the range of 3.1–12.3 μF cm–2. The effect of the electric field at the electrode–electrolyte interface on reducing electrolyte permittivity has also been discussed. The EDLC of carbonized interdigitated electrodes is analyzed in a 6 M KOH electrolyte. The diffuse-layer specific capacitance ranges from 118.7 to 352.0 μF cm–2 depending on the width of the interdigitated electrodes. The Stern-layer specific capacitance is 91.2 μF cm–2, and the total EDLC value is 51.6–72.4 μF cm–2. The modeling and simulation approach can be applied to different mesoporous electrodes by varying the supercapacitor component’s parameters and geometry.

show abstract

“…Metal oxides or conducting polymers like polyaniline or polypyrrole can be used as cathode materials. The EDLC//battery-type hybrid supercapacitor is another type [ 13 ], which uses metal oxides and hydroxides as the cathode materials and carbon materials as an anode.…”

Section: Introductionmentioning

confidence: 99%

“…The electrochemical behavior of carbon nanohorns/polyaniline (PANI)/PPy composites was examined by Chang et al [ 13 , 23 ], who found that they had outstanding cycling stability after 5000 cycles and a specific capacitance of 762 F∙g −1 at 5 m∙Vs −1 . For the PPy materials, Jiang et al employed CNT as a reinforcing component to lessen swelling and shrinkage throughout the doping and dedoping procedures.…”

Section: Introductionmentioning

confidence: 99%

Two-Dimensional Heterostructure of PPy/CNT–E. coli for High-Performance Supercapacitor Electrodes

et al. 2022

View full text Add to dashboard Cite

The nano-biocomposite electrodes composed of carbon nanotube (CNT), polypyrrole (PPy), and E. coli-bacteria were investigated for electrochemical supercapacitors. For this purpose, PPy/CNT–E. coli was successfully synthesized through oxidative polymerization. The PPy/CNT–E. coli electrode exhibited a high specific capacitance of 173 F∙g−1 at the current density of 0.2 A∙g−1, which is much higher than that (37 F∙g−1) of CNT. Furthermore, it displayed sufficient stability after 1000 charge/discharge cycles. The CNT, PPy/CNT, and PPy/CNT–E. coli composites were characterized by x-ray diffraction, scanning electron microscopy, and surface analyzer (Brunauer–Emmett–Teller, BET). In particular, the pyrrole monomers were easily adsorbed and polymerized on the surface of CNT materials, as well as E. coli bacteria enhanced the surface area and porous structure of the PPy/CNT–E. coli composite electrode resulting in high performance of devices.

show abstract

Theories and models of supercapacitors with recent advancements: impact and interpretations

Cited by 45 publications

References 148 publications

Coal-Derived Activated Carbon for Electrochemical Energy Storage: Status on Supercapacitor, Li-Ion Battery, and Li–S Battery Applications

Coal-Derived Activated Carbon for Electrochemical Energy Storage: Status on Supercapacitor, Li-Ion Battery, and Li–S Battery Applications

Simulation Study of Electric Double-Layer Capacitance of Ordered Carbon Electrodes

Two-Dimensional Heterostructure of PPy/CNT–E. coli for High-Performance Supercapacitor Electrodes

Contact Info

Product

Resources

About