Supercapacitors based on (carbon nanostructure)/PEDOT/(eggshell membrane) electrodes

Silva, Romário Justino da; Lima, Ravi Moreno Araújo Pinheiro; Oliveira, Mário César Albuquerque de; Alcaraz-Espinoza, José J.; Melo, Celso P. de; Oliveira, Helinando Pequeno de

doi:10.1016/j.jelechem.2019.113658

Cited by 30 publications

(14 citation statements)

References 68 publications

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“…As seen, the collagen’s functional groups (I, V, X type) can be observed [ 47 , 48 ]. The characteristic peaks were observed at two various areas: the first area is between 3750 and 2500 cm −1 and the second area is below 1700 cm −1 [ 49 ]. The most intense peak in the area with higher wavelengths was observed at 3287 cm −1 , related to the stretching mode of O–H and N–H groups [ 36 , 47 ].…”

Section: Resultsmentioning

confidence: 99%

Fabrication and Characterization of Polyvinylpyrrolidone-Eggshell Membrane-Reduced Graphene Oxide Nanofibers for Tissue Engineering Applications

et al. 2021

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One of the best methods to prevent wound infection and speed up wound healing is wound dressing based on nanofiber–polymer scaffolds, which have acceptable antimicrobial performance and appropriate skin regeneration capabilities. In this paper, the electrospinning method was applied to synthesize the polyvinylpyrrolidone-acrylic acid hydrogel (PVPA)–eggshell membrane (ESM)–reduced graphene oxide (rGO) nanosheets nanocomposite dressings with different reduced graphene oxide contents (0, 0.5, 1, and 2 wt.%). Thus, smooth nanofibers were fabricated, including a high amount of rGO, which reduced the fiber diameter. Based on the results, rGO played an important role in water impermeability. The results showed that by increasing the rGO concentration from 0.5 to 2 wt%, the contact angle value increased persistently. Results showed that compared to PVPA–ESM, the mechanical strength and strain of PVPA–ESM/1 wt% rGO significantly enhanced 28% and 23%, respectively. Incorporation of 1 wt% rGO enhanced swelling ratio from 875% for PVPA-ESM to 1235% after 420 min, while increasing the rGO to 2 wt% increased the degradation rate of the composites. According to the in vitro cell culture studies, PVPA-ESM wound dressings with 0.5–1 wt% rGO content enhanced PC12 cell viability compared to the wound dressings without rGO nanosheets. Generally, rGO–loaded PVPA-ESM nanofiber wound dressing can be considered as a potential candidate to be used in skin regeneration applications.

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Section: Resultsmentioning

confidence: 99%

Fabrication and Characterization of Polyvinylpyrrolidone-Eggshell Membrane-Reduced Graphene Oxide Nanofibers for Tissue Engineering Applications

et al. 2021

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“…If the units of C s are F/kg, then the multiplier should also be different, . The latter multiplier has also been used for calculating the areal energy density in units of Wh/cm 2 (using areal capacitance) , and volumetric energy density (using volumetric capacitance) in units of Wh/cm 3 . In some cases, researchers have chosen not to show any multipliers and write the formula as . ,, We assume that they have applied the multipliers separately to obtain the right units.…”

Section: Resultsmentioning

confidence: 99%

“…The power density of the cell (units: W/kg) is obtained by dividing the energy density by discharge time, Δ t : , The constant 3600 is used to obtain the power density in W/kg when the unit of Δ t is seconds (s). , The same multiplier is used for calculating areal power density (in W/cm 2 ) , and volumetric power density (in W/cm 3 ) . In some cases Δ t is expressed in hours (h) with no multiplier. , …”

Section: Resultsmentioning

confidence: 99%

Pseudocapacitive Energy Storage and Electrocatalytic Hydrogen-Evolution Activity of Defect-Ordered Perovskites Sr_xCa_3–xGaMn₂O₈ (x = 0 and 1)

Karki

Ramezanipour

2020

ACS Appl. Energy Mater.

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The diverse range of possible arrangements of oxygen vacancies in oxygen-deficient perovskites results in a variety of structure types and fascinating electrochemical properties. Here, we report Ca 3 GaMn 2 O 8 and SrCa 2 GaMn 2 O 8 , where the ordering of oxygen vacancies leads to cation and polyhedral order, resulting in a remarkable array of electrochemical properties coexisting in the same compound. Neutron and X-ray diffraction have been utilized to study the structure of these materials that feature simultaneous defect order and cation order. Remarkably, both materials show very high electrocatalytic activity for hydrogen-evolution reaction (HER) of water splitting in bulk form, without the need for composite formation or nanofabrication. The HER overpotential required to achieve a current density of 10 mA/cm 2 is as low as η 10 ≈ −315 mV. In addition, detailed pseudocapacitive studies show that both compounds are capable of energy storage as anion-based pseudocapacitors, arising from oxygen ion intercalation. The symmetric pseudocapacitor cells fabricated based on these materials show a combination of high energy density and power density. These pseudocapacitor cells are also extremely stable, maintaining their high activity over 1000 cycles of charge−discharge. Electrical charge-transport studies indicate that these compounds have semiconducting properties in a wide temperature range, 25− 800 °C. Magnetic studies using both magnetometry and neutron scattering indicate a transition to an antiferromagnetic state, with a G-type arrangement of spins, where the moment on each Mn is aligned antiparallel to all nearest neighbors. This combination of properties indicates the great potential of this class of defect-ordered systems and their importance to energy research.

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“…Recently, the research group of Pequendo de Olivera has recognized that eggshell membrane could be used for designing electrodes suitable for contemporary flexible supercapacitors (SCs) based on carbon nanostructures (CNs) material and conducting polymers (Alcaraz-Espinoza et al, 2017 ; da Silva et al, 2020 ). Fabrication of the supercapacitor electrodes often requires using binder materials or surfactants that could derogate electrochemical performance.…”

Section: Application Of Eggshell-based Materials In Electrochemistrymentioning

confidence: 99%

State-of-the-Art of Eggshell Waste in Materials Science: Recent Advances in Catalysis, Pharmaceutical Applications, and Mechanochemistry

Baláž

Болдырева

Rybin

et al. 2021

Front. Bioeng. Biotechnol.

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Eggshell waste is among the most abundant waste materials coming from food processing technologies. Despite the unique properties that both its components (eggshell, ES, and eggshell membrane, ESM) possess, it is very often discarded without further use. This review article aims to summarize the recent reports utilizing eggshell waste for very diverse purposes, stressing the need to use a mechanochemical approach to broaden its applications. The most studied field with regards to the potential use of eggshell waste is catalysis. Upon proper treatment, it can be used for turning waste oils into biodiesel and moreover, the catalytic effect of eggshell-based material in organic synthesis is also very beneficial. In inorganic chemistry, the eggshell membrane is very often used as a templating agent for nanoparticles production. Such composites are suitable for application in photocatalysis. These bionanocomposites are also capable of heavy metal ions reduction and can be also used for the ozonation process. The eggshell and its membrane are applicable in electrochemistry as well. Due to the high protein content and the presence of functional groups on the surface, ESM can be easily converted to a high-performance electrode material. Finally, both ES and ESM are suitable for medical applications, as the former can be used as an inexpensive Ca2+ source for the development of medications, particles for drug delivery, organic matrix/mineral nanocomposites as potential tissue scaffolds, food supplements and the latter for the treatment of joint diseases, in reparative medicine and vascular graft producing. For the majority of the above-mentioned applications, the pretreatment of the eggshell waste is necessary. Among other options, the mechanochemical pretreatment has found an inevitable place. Since the publication of the last review paper devoted to the mechanochemical treatment of eggshell waste, a few new works have appeared, which are reviewed here to underline the sustainable character of the proposed methodology. The mechanochemical treatment of eggshell is capable of producing the nanoscale material which can be further used for bioceramics synthesis, dehalogenation processes, wastewater treatment, preparation of hydrophobic filters, lithium-ion batteries, dental materials, and in the building industry as cement.

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Supercapacitors based on (carbon nanostructure)/PEDOT/(eggshell membrane) electrodes

Cited by 30 publications

References 68 publications

Fabrication and Characterization of Polyvinylpyrrolidone-Eggshell Membrane-Reduced Graphene Oxide Nanofibers for Tissue Engineering Applications

Fabrication and Characterization of Polyvinylpyrrolidone-Eggshell Membrane-Reduced Graphene Oxide Nanofibers for Tissue Engineering Applications

Pseudocapacitive Energy Storage and Electrocatalytic Hydrogen-Evolution Activity of Defect-Ordered Perovskites Sr_xCa_3–xGaMn₂O₈ (x = 0 and 1)

State-of-the-Art of Eggshell Waste in Materials Science: Recent Advances in Catalysis, Pharmaceutical Applications, and Mechanochemistry

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Supercapacitors based on (carbon nanostructure)/PEDOT/(eggshell membrane) electrodes

Cited by 30 publications

References 68 publications

Fabrication and Characterization of Polyvinylpyrrolidone-Eggshell Membrane-Reduced Graphene Oxide Nanofibers for Tissue Engineering Applications

Fabrication and Characterization of Polyvinylpyrrolidone-Eggshell Membrane-Reduced Graphene Oxide Nanofibers for Tissue Engineering Applications

Pseudocapacitive Energy Storage and Electrocatalytic Hydrogen-Evolution Activity of Defect-Ordered Perovskites SrxCa3–xGaMn2O8 (x = 0 and 1)

State-of-the-Art of Eggshell Waste in Materials Science: Recent Advances in Catalysis, Pharmaceutical Applications, and Mechanochemistry

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Product

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Pseudocapacitive Energy Storage and Electrocatalytic Hydrogen-Evolution Activity of Defect-Ordered Perovskites Sr_xCa_3–xGaMn₂O₈ (x = 0 and 1)