Sulfonated poly(arylene thioether sulfone) cation exchange membranes with improved permselectivity/ion conductivity trade-off

Kristensen, Mette Birch; Haldrup, Sofie; Christensen, Jonas Rask; Catalano, Jacopo; Bentien, Anders

doi:10.1016/j.memsci.2016.08.034

Cited by 22 publications

(12 citation statements)

References 48 publications

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“…Additionally, both membrane resistance and permselectivity are a function of other electrochemical properties, such as the ion exchange capacity (IEC) and fixed charge density [91,114,123,124,126,137,138]. These properties are inherently sensitive to the chemical structure of the polymeric materials for IEMs, and there exists a trade-off between the two parameters depending on the structure-property relationships [114,133,139]. The water transfer coefficients of IEMs need to be minimized as well [140].…”

Section: -mentioning

confidence: 99%

Progress and prospects in reverse electrodialysis for salinity gradient energy conversion and storage

Tufa

Pawlowski

Veerman³

et al. 2018

Applied Energy

249

157

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Salinity gradient energy is currently attracting growing attention among the scientific community as a renewable energy source. In particular, Reverse Electrodialysis (RED) is emerging as one of the most promising membrane-based technologies for renewable energy generation by mixing two solutions of different salinity. This work presents a critical review of the most significant achievements in RED, focusing on membrane development, stack design, fluid dynamics, process optimization, fouling and potential applications. Although RED technology is mainly investigated for energy generation from river water/seawater, the opportunities for the use of concentrated brine are considered as well, driven by benefits in terms of higher power density and mitigation of adverse environmental effects related to brine disposal. Interesting extensions of the applicability of RED for sustainable production of water and hydrogen when complemented by reverse osmosis, membrane distillation, bioelectrochemical systems and water electrolysis technologies are also discussed, along with the possibility to use it as an energy storage device. The main hurdles to market implementation, predominantly related to unavailability of high performance, stable and low-cost membrane materials, are outlined. A techno-economic analysis based on the available literature data is also performed and critical research directions to facilitate commercialization of RED are identified.

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Section: -mentioning

confidence: 99%

Progress and prospects in reverse electrodialysis for salinity gradient energy conversion and storage

Tufa

Pawlowski

Veerman³

et al. 2018

Applied Energy

249

157

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“…Supporting Information in Ref. [28] and [32]). With the latter assumption the following relations hold: in which X m , ω, and c T = X 2 m + (2c v ) 2 are the membrane charge density (referred to the volume of the solution inside the pore), the sign of the immobile charges (ω = +1 for anion exchange membranes), and the total ion concentration, respectively.…”

Section: Unsteady Electro-osmotic Flowmentioning

confidence: 99%

AC-driven electro-osmotic flow in charged nanopores

Catalano¹,

Biesheuvel²

2018

EPL

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In this paper we report the theory describing the electro-osmotic flow in charged nanopores with constant radius and charge density driven by alternating current. We solve the ion and solution transport in unsteady conditions as described by the Navier-Stokes and Nernst-Planck equations considering the electrical potential inside the charged nanopore uniform in the radial direction (Uniform Potential model approximation). We derive the transport equation system in the case in which the pore is connected to two boundary diffusion layers and the cations and anions have different diffusion coefficients. This approach allows the theoretical description of the characteristic frequency dependence of the phase shift between the applied current density and the electro-osmotic flow. Additionally we show how the analysis of the dynamic response of the electro-osmotic coupling factor versus the AC frequency allows us to quantify the apparent ion diffusion coefficient in membranes. Notably, the frequency window where the phase-shift is predicted is well inside the commonly used sampling rate for electro-osmotic flow experiments f ∈ 10 −4 , 10 1 Hz, hence the proposed method can be useful to determine the apparent diffusion coefficient of ions (such as redox complex for flow batteries) in charged membranes.

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“…The solution of the Poisson equation (Eq. 3 ) is central in the “Space charge” model theory and the calculation of the internal solution concentration (as integral of

on the radial direction) will be referred to as “SC” [2] , [3] , [4] In the limiting case of constant electrical potential profile inside the pore (which is strictly valid when the pore radius is smaller than the characteristic Debye length

) the internal solution concentration (

can be determined as:

which coincide with the one calculated from Donnan equilibrium [5] , [6] . In Eq.…”

Section: Datamentioning

confidence: 99%

Data on flow cell optimization for membrane-based electrokinetic energy conversion

et al. 2017

Self Cite

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This article elaborates on the design and optimization of a specialized flow cell for the measurement of direct conversion of pressure into electrical energy (Electrokinetic Energy Conversion, EKEC) which has been presented in Østedgaard-Munck et al. (2017) [1]. Two main flow cell parameters have been monitored and optimized: A) the hydraulic pressure profile on each side of the membrane introduced by pumps recirculating the electrolyte solution through the flow fields and B) the electrical resistance between the current collectors across the combined flow cell. The latter parameter has been measured using four-point Electrochemical Impedance spectroscopy (EIS) for different flow rates and concentrations. The total cell resistance consists of contributions from different components: the membrane (Rmem), anode charge transfer (RnormalA), cathode charge transfer (RnormalC), and ion diffusion in the porous electrodes (RnormalD).The intrinsic membrane properties of Nafion 117 has been investigated experimentally in LiI/I2 solutions with concentrations ranging between 0.06 and 0.96 M and used to identify the preferred LiI/I2 solution concentration. This was achieved by measuring the solution uptake, internal solution concentration and ion exchange capacity. The membrane properties were further used to calculate the transport coefficients and electrokinetic Figure of merit in terms of the Uniform potential and Space charge models. Special attention has been put on the streaming potential coefficient which is an intrinsic property.

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Sulfonated poly(arylene thioether sulfone) cation exchange membranes with improved permselectivity/ion conductivity trade-off

Cited by 22 publications

References 48 publications

Progress and prospects in reverse electrodialysis for salinity gradient energy conversion and storage

Progress and prospects in reverse electrodialysis for salinity gradient energy conversion and storage

AC-driven electro-osmotic flow in charged nanopores

Data on flow cell optimization for membrane-based electrokinetic energy conversion

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