Harnessing the thermogalvanic effect of the ferro/ferricyanide redox couple in a thermally chargeable supercapacitor

Kundu, Arpan; Fisher, Timothy S.

doi:10.1016/j.electacta.2018.05.164

Cited by 38 publications

(36 citation statements)

References 47 publications

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“…The charging mechanism of a supercapacitor allows us to charge it with abundant energy sources available in nature, like light, thermal, vibration, or even gravitational energy [ 185 , 186 , 187 , 188 ]. In the thermal harvesting device family, the potential to have a Soret effect occurring in the electrolyte of the supercapacitor is attractive since it can be compared with having a high Seebeck coefficient in a thermoelectric device.…”

Section: Challenges and Future Perspectivesmentioning

confidence: 99%

Carbon-Based Quantum Dots for Supercapacitors: Recent Advances and Future Challenges

et al. 2021

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Carbon-based Quantum dots (C-QDs) are carbon-based materials that experience the quantum confinement effect, which results in superior optoelectronic properties. In recent years, C-QDs have attracted attention significantly and have shown great application potential as a high-performance supercapacitor device. C-QDs (either as a bare electrode or composite) give a new way to boost supercapacitor performances in higher specific capacitance, high energy density, and good durability. This review comprehensively summarizes the up-to-date progress in C-QD applications either in a bare condition or as a composite with other materials for supercapacitors. The current state of the three distinct C-QD families used for supercapacitors including carbon quantum dots, carbon dots, and graphene quantum dots is highlighted. Two main properties of C-QDs (structural and electrical properties) are presented and analyzed, with a focus on the contribution to supercapacitor performances. Finally, we discuss and outline the remaining major challenges and future perspectives for this growing field with the hope of stimulating further research progress.

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Section: Challenges and Future Perspectivesmentioning

confidence: 99%

Carbon-Based Quantum Dots for Supercapacitors: Recent Advances and Future Challenges

et al. 2021

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“…The thermo-electrochemical cell (TECs) also called as thermo cell or thermogalvanic cell [1,2,3], converting directly the thermal energy to electrical energy, is an attractive renewable energy device for harvesting the low-grade heat (e.g., waste heat from industry and vehicles, the heat from storage or computer system) due to advantages of low cost, simple configuration, direct energy conversion, and stable operation [4,5].…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanotube-Graphene Hybrid Electrodes with Enhanced Thermo-Electrochemical Cell Properties

et al. 2019

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Carbon nanotube-Graphene (CNT-Gr) hybrids were prepared on stainless steel substrates by the electrophoretic deposition (EPD) to make the thermo-electrochemical cell (TEC) electrodes. The as-obtained TEC electrodes were investigated by the SEM, XRD, Raman spectroscopy, tensile, and surface resistance tests. These hybrid electrodes exhibited significant improved TEC performances compared to the pristine CNT electrode. In addition, these hybrid electrodes could be optimized by tuning the contents of the graphene in the hybrids, and the CNT-Gr-0.1 hybrid electrode showed the best TEC performance with the current density of 62.8 A·m−2 and the power density of 1.15 W·m−2, 30.4% higher than the CNT electrode. The enhanced TEC performance is attributed to improvements in the electrical and thermal conductivities, as well as the adhesion between the CNT-Gr hybrid and the substrate. Meanwhile, the relative conversion efficiency of the TECs can reach 1.35%. The investigation suggests that the growth of CNT-Gr hybrid electrodes by the EPD technique may offer a promising approach for practical applications of the carbon nanomaterial-based TEC electrodes.

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“…The following values are going to be used: C sp = 29.25 F/g, m = 1.3 g, ESR = 2.3 ohm, V = 1.5 volts Upon inserting the previous values in Equations (4) and (5), the following is obtained: E max = 4.6 Whr/kg and P max = 93 W/kg The plot of Equation (4) is shown in Figure 24.…”

Section: Ragone Plotmentioning

confidence: 99%

“…Ragone plot for sample (F) will be given here as sample (F) represents the optimum electrode obtained in this work from both the capacitive behavior and the specific capacity value point of view. The following values are going to be used: Csp = 29.25 F/g, m = 1.3 g, ESR = 2.3 ohm, V = 1.5 volts Upon inserting the previous values in Equations (4) and (5), the following is obtained: Emax = 4.6 Whr/kg and Pmax = 93 W/kg The plot of Equation 4 For the sake of comparison of both Emax and Pmax obtained here for sample (F) with those of composite monoliths cited in literature, Table 8 displays the Emax, and the Pmax values for some composite monolith electrodes such as activated carbon/graphene oxide, activated carbon/CNT and activated carbon/graphene. For the sake of comparison of both E max and P max obtained here for sample (F) with those of composite monoliths cited in literature, Table 8 displays the E max , and the P max values for some composite monolith electrodes such as activated carbon/graphene oxide, activated carbon/CNT and activated carbon/graphene.…”

Section: Ragone Plotmentioning

confidence: 99%

“…An electrochemical supercapacitor consists of two electrodes, an electrolyte, and a separator [3]. There are four types of electrolytes: aqueous electrolytes (e.g., H 2 SO 4 and KOH), organic electrolytes (e.g., acetonitrile and propylene carbonate), ionic liquids (e.g., liquid salts) [4], solid state electrolytes (e.g., polyvinyl alcohol mixed with potassium ferrocyanide and potassium ferricyanide gel) [5,6].…”

Section: Introductionmentioning

confidence: 99%

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Preparation of Composite Monolith Supercapacitor Electrode Made from Textile-Grade Polyacrylonitrile Fibers and Phenolic Resin

et al. 2020

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In this work a composite monolith was prepared from widely available and cost effective raw materials, textile-grade polyacrylonitrile (PAN) fibers and phenolic resin. Two activation procedures (physical and chemical) were used to increase the surface area of the produced carbon electrode. Characterization of the thermally stabilized fibers produced was made using differential scanning calorimetry (DSC), thermal gravimetric analysis (TGA) and Carbon-Hydrogen-Nitrogen(CHN) elemental analysis, in order to choose the optimum conditions of producing the stabilized fibers. Characterization of the produced composite monolith electrode was performed using physical adsorption of nitrogen at 77 °K, cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrical resistivity in order to evaluate its performance. All the electrodes prepared had a mixture of micropores and mesopores. Pressing the green monolith during the curing process was found to reduce largely the specific surface area and to some degree the electrical resistivity of the chemically activated composite electrode. Physical activation was more suitable than chemical activation, where it resulted in an electrode with specific capacity 29 F/g, good capacitive behavior and the stability of the electrical resistivity over the temperature range −130 to 80 °C. Chemical activation resulted in a very poor electrode with resistive rather than capacitive properties.

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Harnessing the thermogalvanic effect of the ferro/ferricyanide redox couple in a thermally chargeable supercapacitor

Cited by 38 publications

References 47 publications

Carbon-Based Quantum Dots for Supercapacitors: Recent Advances and Future Challenges

Carbon-Based Quantum Dots for Supercapacitors: Recent Advances and Future Challenges

Carbon Nanotube-Graphene Hybrid Electrodes with Enhanced Thermo-Electrochemical Cell Properties

Preparation of Composite Monolith Supercapacitor Electrode Made from Textile-Grade Polyacrylonitrile Fibers and Phenolic Resin

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