Optimizing microstructure of polyelectrolyte ion exchange membrane for electrodialysis

Cheng, Jin; Zhou, Wenbai; Kong, Deling; Zhang, Zekai; Lu, Yijie; Chen, Yakun; Mu, Hongchun; Lian, Cheng; Liu, Honglai

doi:10.1016/j.cej.2023.143669

Cited by 11 publications

(1 citation statement)

References 53 publications

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“…Chen et al [55] obtained an intrinsic dense membrane by solution casting, which showed good structural and chemical stability in organic solvents, with an ionic conductivity of 0.105 mS.cm −1 , a current efficiency of 91.7% after 20 cycles at 0.1 mA.cm −2 , and a voltage density of 95.7%. Cheng et al [56] added active materials to synthesize multilayer membranes in a two-layer film. Through experiments, it was found that membrane design can be tailored for various needs and different battery systems to achieve maximum efficiency.…”

Section: Latest Ion Exchange Membrane Research Progressmentioning

confidence: 99%

Redox flow battery technology development from the perspective of patent applications: A review

Wang,

Mu,

Yang

et al. 2023

CEST

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With the continuous increase in global energy consumption, the development and utilization of renewable energy become imperative. However, the intermittency and fluctuation of wind and solar power generation prevent direct grid integration, resulting in energy waste. As a large-scale electrochemical energy storage technology, redox flow batteries (RFBs) can effectively store renewable energy and smooth the power output. This paper summarizes the development history of RFBs technology in China by analyzing relevant patent application data, elaborates on the working principles, advantages and disadvantages of various RFBs, and their latest research progress. It analyzes the technical challenges in current RFBs research and presents the application prospects of RFBs commercialization. The results show that although RFBs technology has made significant progress in China, it still faces issues like high battery cost and limited cycle life. To realize the efficient utilization of renewable energy and green low-carbon development, RFBs technology needs continuous optimization and upgrade. This paper can provide references for the development of RFBs technology.

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Section: Latest Ion Exchange Membrane Research Progressmentioning

confidence: 99%

Redox flow battery technology development from the perspective of patent applications: A review

Wang,

Mu,

Yang

et al. 2023

CEST

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Phase behavior of ionic fluid in charged confinement: An associating polymer density functional theory study

Cheng,

Xu,

Wang

et al. 2024

AIChE Journal

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With the rapid advancement of the new energy industry, porous electrode materials and complex electrolytes have gained widespread usage. Electrolytes exhibit distinctive phase behavior when subjected to the combined influence of confined space and electric fields. However, the measurement and prediction of such phase behavior encounter significant challenges. Consequently, numerous theoretical tools have been employed to establish models for phase equilibrium calculations. Nevertheless, current research in this field has notable limitations and fails to address the confinement of space or complex polymer electrolytes. Considering these shortcomings, an associating polymer density functional theory (PDFT) was developed by modifying excess free energy. This study examines the phase behavior of electrolytes with various chain lengths within diverse confined slits, revealing that the confinement effect and fluid tail chains can narrow the phase diagram. Additionally, a linear correlation between the electric field strength and the phase equilibrium offset has been identified, and a quantitative relationship is derived. The results of this investigation contribute to a deeper comprehension of complex fluid phase behavior and guide the design of electrochemical devices.

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Performance of Single Nanopore and Multi‐Pore Membranes for Blue Energy

Baldelli,

Di Muccio,

Viola

et al. 2024

ChemPhysChem

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The salinity gradient power extracted from the mixing of electrolyte solutions at dierent concentrations through selective nanoporous membranes is a promising route to renewable energy. However, several challenges need to be addressed to make this technology protable, one of the most relevant being the increase of the extractable power per membrane area. Here, the performance of asymmetric conical and bullet‐shaped nanopores in a 50 nm thick membrane are studied via electrohydrodynamic simulations, varying the pore radius, curvature, and surface charge. The output power reaches ∼ 60 pW per pore for positively charged membranes (surface charge σw =160 mC/m2 ) and ∼ 30 pW for negatively charges ones, σw =−160 mC/m2 and it is robust to minor variations of nanopore shape and radius. A theoretical argument that takes into account the interaction among neighbour pores allows to extrapolate the single‐pore performance to multi‐pore membranes showing that power densities from tens to hundreds of W/m2 can be reached by proper tuning of the nanopore number density and the boundary layer thickness. Our model for scaling single‐pore performance to multi‐pore membrane can be applied also to experimental data providing a simple tool to effectively compare different nanopore membranes in blue energy applications.

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Optimizing microstructure of polyelectrolyte ion exchange membrane for electrodialysis

Cited by 11 publications

References 53 publications

Redox flow battery technology development from the perspective of patent applications: A review

Redox flow battery technology development from the perspective of patent applications: A review

Phase behavior of ionic fluid in charged confinement: An associating polymer density functional theory study

Performance of Single Nanopore and Multi‐Pore Membranes for Blue Energy

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