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Nafion

About: Nafion is a research topic. Over the lifetime, 9110 publications have been published within this topic receiving 320865 citations.


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Journal ArticleDOI
TL;DR: An amperometric biosensor based on tyrosinase immobilized in a silicate/Nafion composite film has been developed for the determination of phenolic compounds.

136 citations

Journal ArticleDOI
TL;DR: Methode electrochimique pour produire des films flexibles de copolymere a partir de Nafion ioniquement conducteur and de polypyrrole as mentioned in this paper.
Abstract: Methode electrochimique pour produire des films flexibles de copolymere a partir de Nafion ioniquement conducteur et de polypyrrole

135 citations

Journal ArticleDOI
TL;DR: The tensile creep of the acid form of Nafion N1110 was examined under controlled environmental conditions of temperature, 25 ≤ T ≤ 110 °C, and water activity, 0 ≤ aw ≤ 0.95 as mentioned in this paper.
Abstract: The tensile creep of the acid form of Nafion N1110 was examined under controlled environmental conditions of temperature, 25 ≤ T ≤ 110 °C, and water activity, 0 ≤ aw ≤ 0.95. Water plasticizes Nafion at 25 °C; creep strain after 1 h increases and the elastic modulus decreases with increasing water activity. At temperatures ≥40 °C the elastic modulus of Nafion goes through a maximum as a function of water activity; the elastic modulus of Nafion increases as aw increases from 0 to 0.01 and then decreases with increasing water activity for aw > 0.1. Under dry conditions (aw = 0), Nafion undergoes a transition between 60 and 80 °C where its creep rate increases rapidly and its elastic modulus decreases with increasing temperature. Above this transition temperature a small water activity, aw < 0.1, dramatically reduces the creep rate and increases the elastic modulus of Nafion—at elevated temperature water stiffens Nafion. At intermediate temperatures (40−80 °C) the elastic and viscous components of creep recov...

135 citations

Journal ArticleDOI
TL;DR: A method which improves carbon fiber microelectrode selectivity for cationic amines by electrocoating the fiber with a thin film of the ionic polymer, Nafion, is described.

135 citations

Journal ArticleDOI
TL;DR: In this article, an advanced charged sponge-like porous membranes with ultrahigh stability and selectivity are designed and fabricated for vanadium flow battery (VFB) applications, which are fabricated via constructing positively charged cross-linked networks on the pore walls of polysulfone membranes.
Abstract: Advanced charged sponge-like porous membranes with ultrahigh stability and selectivity are designed and fabricated for vanadium flow battery (VFB) applications. The designed porous membranes are fabricated via constructing positively charged cross-linked networks on the pore walls of polysulfone membranes. The charge density of the pore walls can be tuned by changing the crosslinking time. The positively charged pore walls can effectively retain vanadium ions via Donnan exclusion, hence keeping extremely high selectivity, while the crosslinked network effectively increases the membrane stability. As a result, the designed membranes exhibit an outstanding performance, combining extremely high selectivity and stability. The single cell assembled with the prepared porous membrane shows a columbic efficiency of 99% and an energy efficiency of 86% at a current density of 80 mA cm−2, which is much higher than Nafion 115 (93.5%; 82.3%). A battery assembled with the prepared membrane shows a stable battery performance over more than 6000 cycles, which is by far the longest record for porous membranes ever reported. These results indicate that advanced, charged, sponge-like, porous membranes with a crosslinked pore-wall structure are highly promising for VFB applications.

135 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023253
2022503
2021338
2020367
2019386
2018393