A comprehensive study on effect of carbon nanomaterials as conductive additives in EDLCs

Ayaganov, Zhanibek; Pavlenko, Vladimir; Haque, Syed Fahad Bin; Tanybayeva, Ainur; Ferraris, John; Zakhidov, Anvar; Mansurov, Zulkhair; Bakenov, Zhumabay; Ng, Annie

doi:10.1016/j.est.2023.110035

Cited by 14 publications

(7 citation statements)

References 35 publications

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“…The Raman scattering spectra were obtained using a Solver Spectrum, NT-MDT instrument with a blue solid-state laser at a wavelength of 473 nm and a spectral resolution of 4 cm -1 . The graphitization value G(%) of the obtained samples was determined by the formula [20]:…”

Section: Materials Characterizationmentioning

confidence: 99%

Optimization of the Porous Structure of Carbon Electrodes for Hybrid Supercapacitors with a Redox Electrolyte Based on Potassium Bromide

Pavlenko,

Temirkulova,

Zakharov

et al. 2024

Eurasian Chem.-Technol. J.

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This work investigates the electrochemical behavior of hybrid supercapacitors with carbon-based electrodes of different porosity using 5M NaNO3 + 0.5M KBr electrolyte to optimize energy storage processes. Three types of carbon materials were synthesized: activated carbon from rice husk (RH) with a specific surface area of ~2300 m2/g and pore size < 1 nm, and templated carbons from magnesium citrate (MP-8) and glucose with SiO2 as a template (G7), having surface areas of 1976 and 1320 m2/g and pore sizes of 3.4 and 7 nm, respectively. The microporous structure of activated carbon (AC) obtained from RH shows limitations in the diffusion of electrolyte ions, which affects the charge-discharge kinetics. In contrast, the larger mesoporous structures of templated carbons promoted better adsorption and ion transport, significantly affecting the dynamics of redox reactions. The RH/MP-8 hybrid capacitor, combining high surface area and large pore size, demonstrated a 54% increase in specific capacitance, 128% increase in specific energy and 51% increase in energy efficiency at high current densities of 5 A/g, comparing to the symmetric RH/RH hybrid capacitor. This study highlights the critical importance of the relationship between electrode pore structure and electrolyte composition for optimizing supercapacitor performance, which provides valuable information for the development of efficient energy storage technologies.

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Section: Materials Characterizationmentioning

confidence: 99%

Optimization of the Porous Structure of Carbon Electrodes for Hybrid Supercapacitors with a Redox Electrolyte Based on Potassium Bromide

Pavlenko,

Temirkulova,

Zakharov

et al. 2024

Eurasian Chem.-Technol. J.

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“…The electrochemical performance of EDLCs is considerably affected by several key components, including the electrolyte, conducting additive, binder, and active material [ 95 , 96 , 97 , 98 , 99 , 100 , 101 ]. Electrolytes can be divided into aqueous and organic types, with the latter being preferred in the industry due to their higher electrical conductivity and stability at elevated voltages [ 102 , 103 ].…”

Section: Edlcmentioning

confidence: 99%

“…Electrolytes can be divided into aqueous and organic types, with the latter being preferred in the industry due to their higher electrical conductivity and stability at elevated voltages [ 102 , 103 ]. Conducting additives, such as carbon black, increase the electrical conductivity of the electrodes [ 98 ]. Binders, such as polytetrafluoroethylene and polyvinylidene fluoride (PVDF), bond the conductive additive and active material to the current collector [ 99 ].…”

Section: Edlcmentioning

confidence: 99%

Advances in Carbon Xerogels: Structural Optimization for Enhanced EDLC Performance

Choi,

Jung,

Jung

2024

Gels

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This review explores the recent progress on carbon xerogels (CXs) and highlights their development and use as efficient electrodes in organic electric double-layer capacitors (EDLCs). In addition, this work examines how the adjustment of synthesis parameters, such as pH, polymerization duration, and the reactant-to-catalyst ratio, crucially affects the structure and electrochemical properties of xerogels. The adaptability of xerogels in terms of modification of their porosity and structure plays a vital role in the improvement of EDLC applications as it directly influences the interaction between electrolyte ions and the electrode surface, which is a key factor in determining EDLC performance. The review further discusses the substantial effects of chemical activation with KOH on the improvement of the porous structure and specific surface area, which leads to notable electrochemical enhancements. This structural control facilitates improvement in ion transport and storage, which are essential for efficient EDLC charge–discharge (C–D) cycles. Compared with commercial activated carbons for EDLC electrodes, CXs attract interest for their superior surface area, lower electrical resistance, and stable performance across diverse C–D rates, which underscore their promising potential in EDLC applications. This in-depth review not only summarizes the advancements in CX research but also highlights their potential to expand and improve EDLC applications and demonstrate the critical role of their tunable porosity and structure in the evolution of next-generation energy storage systems.

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“…10–13 EDLCs have been studied for this purpose as they have higher power density and longer cycle life compared to Li-ion batteries but their energy density is lower by several orders of magnitude. 14–18 PCs based on conducting polymers and redox-active metal oxides have also been studied because they have better energy density than EDLCs. However, PCs have poor cyclability or low electrical conductivity which limits their utility.…”

Section: Introductionmentioning

confidence: 99%

Carbon fiber composite electrodes derived from metal organic polyhedra-18 and matrimid for hybrid supercapacitors

Haque,

Tian,

Tague

et al. 2024

Energy Adv.

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A comprehensive study on effect of carbon nanomaterials as conductive additives in EDLCs

Cited by 14 publications

References 35 publications

Optimization of the Porous Structure of Carbon Electrodes for Hybrid Supercapacitors with a Redox Electrolyte Based on Potassium Bromide

Optimization of the Porous Structure of Carbon Electrodes for Hybrid Supercapacitors with a Redox Electrolyte Based on Potassium Bromide

Advances in Carbon Xerogels: Structural Optimization for Enhanced EDLC Performance

Carbon fiber composite electrodes derived from metal organic polyhedra-18 and matrimid for hybrid supercapacitors

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