A highly-selective layer-by-layer membrane modified with polyethylenimine and graphene oxide for vanadium redox flow battery

Sha’rani, Saidatul Sophia; Nasef, Mohamed Mahmoud; Jusoh, Nurfatehah Wahyuny Che; Isa, Eleen Dayana Mohamed; Ali, Roshafima Rasit

doi:10.1080/14686996.2023.2300697

Cited by 5 publications

(1 citation statement)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As mentioned in the Introduction paragraph, creating an LbL assembly on a substrate usually requires the alternate deposition of oppositely electrically charged layers, made of polyelectrolytes, micro-or nanoparticles, rods/tubes, sheets/lamellae, or bio(macro)molecules. However, instead of exploiting electrostatic interactions among the deposited layers, it is possible to employ other types of interactions, namely as follows: hydrogen bonding [43,44], covalent bonding [45,46], and donor/acceptor exchanges [47,48]. Figure 3 depicts a general schematization of the LbL methodology.…”

Section: Basics Of the Layer-by-layer Methodologymentioning

confidence: 99%

Nanostructured Flame-Retardant Layer-by-Layer Architectures for Cotton Fabrics: The Current State of the Art and Perspectives

Malucelli

2024

Nanomaterials

View full text Add to dashboard Cite

Nowadays, nanotechnology represents a well-established approach, suitable for designing, producing, and applying materials to a broad range of advanced sectors. In this context, the use of well-suited “nano” approaches accounted for a big step forward in conferring optimized flame-retardant features to such a cellulosic textile material as cotton, considering its high ease of flammability, yearly production, and extended use. Being a surface-localized phenomenon, the flammability of cotton can be quite simply and effectively controlled by tailoring its surface through the deposition of nano-objects, capable of slowing down the heat and mass transfer from and to the textile surroundings, which accounts for flame fueling and possibly interacting with the propagating radicals in the gas phase. In this context, the layer-by-layer (LbL) approach has definitively demonstrated its reliability and effectiveness in providing cotton with enhanced flame-retardant features, through the formation of fully inorganic or hybrid organic/inorganic nanostructured assemblies on the fabric surface. Therefore, the present work aims to summarize the current state of the art related to the use of nanostructured LbL architectures for cotton flame retardancy, offering an overview of the latest research outcomes that often highlight the multifunctional character of the deposited assemblies and discussing the current limitations and some perspectives.

show abstract

Section: Basics Of the Layer-by-layer Methodologymentioning

confidence: 99%

Nanostructured Flame-Retardant Layer-by-Layer Architectures for Cotton Fabrics: The Current State of the Art and Perspectives

Malucelli

2024

Nanomaterials

View full text Add to dashboard Cite

show abstract

A Critical Update on the Design of Dense Ion‐Conducting Membranes for Redox Flow Batteries

Niccolai,

Guazzelli,

El Koura

et al. 2024

Advanced Sustainable Systems

View full text Add to dashboard Cite

Recent progress in the design and preparation of dense ion‐conducting membranes, to improve redox flow batteries (RFBs) performance are critically examined. The ideal membrane has to balance a high ionic conductivity, a low crossover of ion/redox‐active species, and high coulombic and voltage efficiencies. Several ion exchange membranes are analyzed, with a focus on proton exchange membranes (PEMs), that are the most mature membrane technology in RFBs, led by the gold standard Nafion. Key developments in the design of membranes include the synthesis of tailored (co)polymers, the post‐functionalization of commercially available ones, membrane formation techniques like electrospinning, polymer blending, the additions of organic and inorganic fillers, and surface modification. Dense, asymmetric and composite membranes are reported and discussed. The effects on the membrane properties of macromolecular parameters (polymer backbone, type and length of the side chains, and the acidity of the ion‐exchanging group) are highlighted. Correlations between chemical structure, properties and performance are discussed, targeting the trade‐off between conductivity, selectivity and overall performance of the RFB cell. Although significant steps forward in the development of ion‐conducting membranes were made, improvements in electrochemical properties and long‐term stability, while reducing costs, are still challenging and necessary to a large‐scale application of RFBs.

show abstract

Ion Exchange Membranes: Latest Developments toward High-Performance Vanadium Redox Flow Batteries

Sreenath,

P S,

Krebsz

et al. 2024

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

Redox flow batteries (RFBs) are one of the hopes for grid energy storage applications. Among the various RFBs, the vanadium redox flow battery (VRFB) has the specific advantage of deploying the same element, i.e., vanadium in different oxidation states in both negolyte and posolyte. However, its major unmet concern is the poor charge retention during cycling, attributed to cross-contamination of vanadium across the separator. Perfluorosulfonic acid-based cation exchange membranes (CEMs) are the preferred separators for VRFB. Nevertheless, for the negatively charged matrix of CEMs, redox-active vanadium species are the counterions and easily diffuse through, leading to capacity decay. To counter the crossover, the benefit of Donnan exclusion has been considered. For this reason, anion exchange membranes (AEMs) are encouraged for VRFB. The positive charge on AEMs can effectively exclude the vanadium ions, but AEMs have the limitation of low ionic conductivity and questionable chemical stability in a highly oxidative flow battery environment. In recent years, the membrane research community has adopted different strategies to counter the cross-contamination of the vanadium ions between the electrodes and boost the overall performance of the battery. In this review, we will focus on the various approaches developed for the advancement of VRFB membranes.

show abstract

A highly-selective layer-by-layer membrane modified with polyethylenimine and graphene oxide for vanadium redox flow battery

Cited by 5 publications

References 60 publications

Nanostructured Flame-Retardant Layer-by-Layer Architectures for Cotton Fabrics: The Current State of the Art and Perspectives

Nanostructured Flame-Retardant Layer-by-Layer Architectures for Cotton Fabrics: The Current State of the Art and Perspectives

A Critical Update on the Design of Dense Ion‐Conducting Membranes for Redox Flow Batteries

Ion Exchange Membranes: Latest Developments toward High-Performance Vanadium Redox Flow Batteries

Contact Info

Product

Resources

About