Revisiting the performance of electrical double-layer capacitors implementing a sodium perchlorate water-in-salt electrolyte

Gharouel, S.; Béguin, François

doi:10.1016/j.electacta.2023.142212

Cited by 9 publications

(4 citation statements)

References 27 publications

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“…Figure 5 shows the EIS data as Nyquist and Bode plots for 316F and 316G. The Nyquist curves of all the samples showed an arc, indicating a capacitive metal/electrolyte interface [32,33], while the impedance moduli were almost identical, as shown in Figure 5a,b.…”

Section: Electrochemical Corrosion Behavior 221 Electrochemical Imped...mentioning

confidence: 87%

Corrosion Resistance and Mechanical Properties of Cr-Rich 316 Stainless Steel Coatings Fabricated by the TIG Process Using Flux-Cored Wires

Zhang,

Jian,

Yin

et al. 2024

Molecules

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Arc welded 316 stainless steel coatings with flux-cored wires are very promising for marine service environments due to their low cost, high efficiency, and satisfactory performance, while they suffers from Cr dilution during the preparation process. Herein, based on the consideration of increasing the Cr content and ensuring the same value of the Cr/Ni equivalence ratio (Creq/Nieq), 316-modified flux-cored wires, 316F (19Cr-12Ni-3Mo) and 316G (22Cr-14Ni-3Mo), were designed under the guidance of a Schaeffler diagram for the improvement of the electrochemical and mechanical properties of 316 stainless steel coatings. The designed flux-cored wires were welded into a three-layer cladding by the tungsten inert gas welding (TIG) process, and the microstructure, corrosion resistance, and mechanical properties of the claddings were investigated. The results showed that 316F and 316G consist of γ-Fe (austenite) and a small portion of δ-Fe (ferrite) as the Creq/Nieq is approximately 1.5. However, due to the higher value of the equivalent Cr content (ECC), 316G has an additional intermetallic phase (σ), which precipitates as a strengthening phase at grain boundaries, significantly increasing the tensile and yield strength of 316G but reducing its plasticity. In addition, the corrosion current density (icorr) and pitting potential (Eb) for 316G are 0.20447 μA·cm−2 and 0.634 V, respectively, while the values for 316F are 0.32117 μA·cm−2 and 0.603 V, respectively, indicating that 316G has better anti-corrosion performance.

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Section: Electrochemical Corrosion Behavior 221 Electrochemical Imped...mentioning

confidence: 87%

Corrosion Resistance and Mechanical Properties of Cr-Rich 316 Stainless Steel Coatings Fabricated by the TIG Process Using Flux-Cored Wires

Zhang,

Jian,

Yin

et al. 2024

Molecules

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“…The C-CA-and C-TL-based electrodes preserved 41.5 and 38.5% of the specific capacitances, respectively (relative to the specific capacitances at 1 A g −1 ), even at a high current density of 10 A g −1 ; this demonstrates the high rate of capability of electrodes based on Al-coated current collectors. In addition, the coulombic efficiencies of both electrodes were calculated to evaluate their energy-storage abilities by computing the ratio of the discharge and charge energy densities [83]. In the case of the C-CA-based electrode, the charge and discharge energy densities were 270.7 and 236.9 mWh g −1 at 1 A g −1 , respectively, and the coulombic efficiency was calculated as 87.5%.…”

Section: Electrochemical Properties Of C-ca@nio-and C-tl@nio-based El...mentioning

confidence: 99%

Preparation of a High-Performance Asymmetric Supercapacitor by Recycling Aluminum Paper and Filter Components of Heated Tobacco

Kim,

Jekal,

Kim

et al. 2023

Materials

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In this study, Al paper and cellulose acetate (CA) filters derived from heated tobacco waste were successfully converted into current collectors and active materials for a supercapacitor device. Typically, heated tobacco contains electrically discontinuous Al paper. First, Al was extracted from the tobacco waste using HCl to produce Lewis acid (AlCl3). This acid was then used in an Al electrodeposition process utilizing the chloroaluminate ionic liquid reaction between the acid and the base (RCl) at room temperature. To enhance the conductivity, a supplementary coating of Al metal was applied to the Al paper through electrodeposition, thus re-establishing the electrical continuity of the discontinuous parts and forming an Al-coated current collector. Moreover, the CA filters were carbonized under a nitrogen atmosphere, yielding carbon precursors (C-CA) for the supercapacitor electrodes. To further enhance the electrochemical performance, nickel oxide (NiO) was incorporated into C-CA, resulting in C-CA@NiO with pseudocapacitance. The specific surface area of CA increased with carbonization and the subsequent incorporation of NiO. The as-synthesized C-CA and C-CA@NiO materials were applied to an Al-coated current collector to obtain C-CA- and C-CA@NiO-based electrodes, exhibiting stable electrochemical behavior in the voltage range of −1.0 to 0 V and 0 to 1.0 V, respectively. An asymmetric supercapacitor (ASC) device was assembled with C-CA@NiO and C-CA as the positive and negative electrodes, respectively. This ASC device demonstrated a high specific capacitance of 40.8 F g−1, while widening the operating voltage window to 2.0 V. The high electrochemical performance of the device is attributed to the successful Al electrodeposition, which facilitates the electrical conductivity and increased porosity of the C-CA@NiO and C-CA materials. To the best of our knowledge, this is a pioneering study in regards to the conversion of biomass waste into current collectors and active materials to fabricate a practical ASC device. Our findings highlight the potential of reusing Al paper and CA filters from heated tobacco waste as essential components of energy storage devices.

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“…Under conditions of extremely high salinity, the electrolyte, including water molecules coordinated with salt ions, remain stable, enabling a wide range of operating voltages. [22][23][24][25][26][27] In the initial WIS work on Lithium bis(trifluoromethanesulfonyl)Imide (LiTFSI) electrolytes in the battery context, the ESW was extended to ~3 V with a 21 m salt concentration. [18] The maximum ESW of this result can be attributed to the interaction between water molecules and anions, [21,24] resulting in a varying ESW depending on the WIS-type electrolytes, e. g. 2.7 V for 17 m NaClO 4 , [28] 2.1 V for 12 m NaNO 3 [29] (using activated carbon with 3electrode configuration), and 2.5 V for 32 m KCH 3 COO + 8 m LiCH 3 COO (using Highly ordered pyrolytic graphite with 3electrode configuration).…”

Section: Introductionmentioning

confidence: 99%

“…The broad operating ESW of SCs can be attributed to their reliance on ion adsorption and desorption processes at the electrode surfaces, rather than chemical reactions. Under conditions of extremely high salinity, the electrolyte, including water molecules coordinated with salt ions, remain stable, enabling a wide range of operating voltages [22–27] . In the initial WIS work on Lithium bis(trifluoromethanesulfonyl)Imide (LiTFSI) electrolytes in the battery context, the ESW was extended to ~3 V with a 21 m salt concentration [18] .…”

Section: Introductionmentioning

confidence: 99%

Effect of Salt Concentration in Water‐In‐Salt Electrolyte on Supercapacitor Applications

Hwang,

Leketas,

Griffiths

et al. 2024

ChemElectroChem

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Electrical double‐layer supercapacitors offer numerous advantages in the context of energy storage; however, their widespread use is hindered by the high unit energy cost and low specific energy. Recently, water‐in‐salt (WIS) electrolytes have garnered interest for use in energy storage devices. Nevertheless, their direct application in high‐power devices is limited due to their high viscosity. In this study, we investigate the WIS Lithium bis(trifluoromethanesulfonyl)Imide (LiTFSI) electrolyte, revealing a high specific capacitance despite its elevated viscosity and restricted ionic conductivity. Our approach involves nuclear magnetic resonance (NMR) analysis alongside electrochemical analyses, highlighting the pronounced advantage of the WIS LiTFSI electrolyte over the WIS LiCl electrolyte at the molecular level. The NMR analysis shows that the LiTFSI electrolyte ions preferentially reside within the activated carbon pore network in the absence of an applied potential, in contrast to LiCl where the ions are more evenly distributed between the in‐pore and ex‐pore environments. This difference may contribute to the difference in capacitance between the two electrolytes observed during electrochemical cycling.

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Revisiting the performance of electrical double-layer capacitors implementing a sodium perchlorate water-in-salt electrolyte

Cited by 9 publications

References 27 publications

Corrosion Resistance and Mechanical Properties of Cr-Rich 316 Stainless Steel Coatings Fabricated by the TIG Process Using Flux-Cored Wires

Corrosion Resistance and Mechanical Properties of Cr-Rich 316 Stainless Steel Coatings Fabricated by the TIG Process Using Flux-Cored Wires

Preparation of a High-Performance Asymmetric Supercapacitor by Recycling Aluminum Paper and Filter Components of Heated Tobacco

Effect of Salt Concentration in Water‐In‐Salt Electrolyte on Supercapacitor Applications

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