Temperature dependences of the double layer capacitance of some solid/liquid and solid/solid electrified interfaces. An experimental study

Watzele, Sebastian; Katzenmeier, Leon; Sabawa, Jarek P.; Garlyyev, Batyr; Bandarenka, Aliaksandr S.

doi:10.1016/j.electacta.2021.138969

Cited by 18 publications

(16 citation statements)

References 35 publications

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“…With an increase in temperature, the curve moves down as a whole, which indicates that, in the temperature range from 288.15 K to 358.15 K, the capacitance is inversely related to the temperature at all voltages. In the literature [ 80 ], the electrochemical impedance spectroscopy is used to measure the double layer capacitance of the polycrystalline Pt–aqueous HClO 4 solutions interface; therein, it is illustrated that the capacitance decreases with the solution temperature increasing. It is considered [ 80 ] that the inverse correlation is mainly due to the dropping of the dielectric constant at elevated temperatures, which leads to such an effect.…”

Section: Resultsmentioning

confidence: 99%

“…In the literature [ 80 ], the electrochemical impedance spectroscopy is used to measure the double layer capacitance of the polycrystalline Pt–aqueous HClO 4 solutions interface; therein, it is illustrated that the capacitance decreases with the solution temperature increasing. It is considered [ 80 ] that the inverse correlation is mainly due to the dropping of the dielectric constant at elevated temperatures, which leads to such an effect. In the present work, although the redundant permittivity is fixed at 6.0, the water model we use takes into account the electric dipole moment of the real water molecule, so the calculated equilibrium density distributions must reflect the influence of the water molecule electric dipole on the electrostatic shielding and certainly also take into account the weakening of the electrostatic shielding or, in other words, the dropping of the dielectric constant, caused by the rise of temperature.…”

Section: Resultsmentioning

confidence: 99%

“…From the information provided in Figure 3 , we can produce four analyses. First, the three water models can provide the inverse correlation effect between

and

, but the dimer hard sphere model and PM model provide an extremely weak inverse correlation effect, which is inconsistent with the experiment [ 80 ]; while the dipole dimer hard sphere model provides a more obvious inverse correlation effect, which is more consistent with the experimental measure [ 80 ]. Second, the explicit consideration of the water molecule hard core without the electric dipole causes an unexpected phenomenon: raising capacitance, rather than reducing the seriously overestimated capacitance caused by the adoption of PM; the overestimation also can be caused by using the solvent hard sphere model to represent the water molecule hard core [ 58 ].…”

Section: Resultsmentioning

confidence: 99%

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RETRACTED: Capacitive Behavior of Aqueous Electrical Double Layer Based on Dipole Dimer Water Model

2022

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The aim of the present paper is to investigate the possibility of using the dipole dimer as water model in describing the electrical double layer capacitor capacitance behaviors. Several points are confirmed. First, the use of the dipole dimer water model enables several experimental phenomena of aqueous electrical double layer capacitance to be achievable: suppress the differential capacitance values gravely overestimated by the hard sphere water model and continuum medium water model, respectively; reproduce the negative correlation effect between the differential capacitance and temperature, insensitivity of the differential capacitance to bulk electrolyte concentration, and camel–shaped capacitance–voltage curves; and more quantitatively describe the camel peak position of the capacitance–voltage curve and its dependence on the counter-ion size. Second, we fully illustrate that the electric dipole plays an irreplaceable role in reproducing the above experimentally confirmed capacitance behaviors and the previous hard sphere water model without considering the electric dipole is simply not competent. The novelty of the paper is that it shows the potential of the dipole dimer water model in helping reproduce experimentally verified aqueous electric double layer capacitance behaviors. One can expect to realize this potential by properly selecting parameters such as the dimer site size, neutral interaction, residual dielectric constant, etc.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…From the information provided in Figure 3 , we can produce four analyses. First, the three water models can provide the inverse correlation effect between

and

Section: Resultsmentioning

confidence: 99%

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RETRACTED: Capacitive Behavior of Aqueous Electrical Double Layer Based on Dipole Dimer Water Model

2022

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“…The relatively wide layer was found to be in coexistence with a single Li + -ion layer, which can be understood as the formation of a compact Helmholtz layer in liquid electrolytes (LEs). 14 The comparison of experimentally obtained widths and concentration changes to theoretical models is hindered by the uncertainties of physical parameters needed to calculate the impact of applied potential on the formation of an SCL. The transport of ions in SSEs can be described by a thermally activated hopping mechanism between unoccupied lattice vacancies.…”

Section: Introductionmentioning

confidence: 99%

“…The SCL width was found to range up to 200 nm into the SSE at a bias potential of 1.5 V with spectroscopic ellipsometry, which is in reasonable agreement with the capacitance of such a layer measured with impedance spectroscopy. The relatively wide layer was found to be in coexistence with a single Li + -ion layer, which can be understood as the formation of a compact Helmholtz layer in liquid electrolytes (LEs) . The comparison of experimentally obtained widths and concentration changes to theoretical models is hindered by the uncertainties of physical parameters needed to calculate the impact of applied potential on the formation of an SCL.…”

Section: Introductionmentioning

confidence: 99%

Modeling of Space-Charge Layers in Solid-State Electrolytes: A Kinetic Monte Carlo Approach and Its Validation

et al. 2022

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The space-charge layer (SCL) phenomenon in Li +ion-conducting solid-state electrolytes (SSEs) is gaining much interest in different fields of solid-state ionics. Not only do SCLs influence charge-transfer resistance in all-solid-state batteries but also are analogous to their electronic counterpart in semiconductors; they could be used for Li + -ionic devices. However, the rather "elusive" nature of these layers, which occur on the nanometer scale and with only small changes in concentrations, makes them hard to fully characterize experimentally. Theoretical considerations based on either electrochemical or thermodynamic models are limited due to missing physical, chemical, and electrochemical parameters. In this work, we use kinetic Monte Carlo (kMC) simulations with a small set of input parameters to model the spatial extent of the SCLs. The predictive power of the kMC model is demonstrated by finding a critical range for each parameter in which the space-charge layer growth is significant and must be considered in electrochemical and ionic devices. The time evolution of the charge redistribution is investigated, showing that the SCLs form within 500 ms after applying a bias potential.

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Innervate Commercial Fabrics with Spirally‐Layered Iontronic Fibrous Sensors Toward Dual‐Functional Smart Garments

Wu,

Liu,

Zheng

et al. 2024

Advanced Science

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Electronic fabrics exhibit desirable breathability, wearing comfort, and easy integration with garments. However, surficial deposition of electronically functional materials/compounds onto fabric substrates would consequentially alter their intrinsic properties (e.g., softness, permeability, biocompatibility, etc.). To address this issue, here, a strategy to innervate arbitrary commercial fabrics with unique spirally‐layered iontronic fibrous (SLIF) sensors is presented to realize both mechanical and thermal sensing functionalities without sacrificing the intrinsic fabric properties. The mechanical sensing function is realized via mechanically regulating the interfacial ionic supercapacitance between two perpendicular SLIF sensors, while the thermal sensing function is achieved based on thermally modulating the intrinsic ionic impedance in a single SLIF sensor. The resultant SLIF sensor‐innervated electronic fabrics exhibit high mechanical sensitivity of 81 N−1, superior thermal sensitivity of 34,400 Ω °C−1, and more importantly, greatly minimized mutual interference between the two sensing functions. As demonstrations, various smart garments are developed for the precise monitoring of diverse human physiological signals. Moreover, artificial intelligence‐assisted object recognition with high‐accuracy (97.8%) is demonstrated with a SLIF sensor‐innervated smart glove. This work opens up a new path toward the facile construction of versatile smart garments for wearable healthcare, human‐machine interfaces, and the Internet of Things.

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Temperature dependences of the double layer capacitance of some solid/liquid and solid/solid electrified interfaces. An experimental study

Cited by 18 publications

References 35 publications

RETRACTED: Capacitive Behavior of Aqueous Electrical Double Layer Based on Dipole Dimer Water Model

RETRACTED: Capacitive Behavior of Aqueous Electrical Double Layer Based on Dipole Dimer Water Model

Modeling of Space-Charge Layers in Solid-State Electrolytes: A Kinetic Monte Carlo Approach and Its Validation

Innervate Commercial Fabrics with Spirally‐Layered Iontronic Fibrous Sensors Toward Dual‐Functional Smart Garments

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