Structure-transport relationships of poly(aryl piperidinium) anion-exchange membranes: Eeffect of anions and hydration

Luo, Xiaoyan; Rojas‐Carbonell, Santiago; Yan, Yushan; Kusoglu, Ahmet

doi:10.1016/j.memsci.2019.117680

Cited by 71 publications

(74 citation statements)

References 83 publications

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“…8). The similarity in this value is not surprising, since the membrane conductance is mostly affected by the operational conditions and the charge-transporting ions 35,36 . Analysing the anode gas composition and the complete mass balance of the process, CO 3 2− was identified as the majority charge carrier through the AEM, irrespective of the anolyte used (Supplementary Note 3 and Supplementary Fig.…”

Section: Operation Of Co 2 Electrolysers With Pure Water Anolytementioning

confidence: 78%

Operando cathode activation with alkali metal cations for high current density operation of water-fed zero-gap carbon dioxide electrolysers

et al. 2021

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Section: Operation Of Co 2 Electrolysers With Pure Water Anolytementioning

confidence: 78%

Operando cathode activation with alkali metal cations for high current density operation of water-fed zero-gap carbon dioxide electrolysers

et al. 2021

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“…This conductivity is related to the number of charge carriers and their mobility, both of which are enhanced by IEC . Moreover, the charge carrier mobility increases with increasing water uptake as well as the connectivity between the ionic domains [ 55 ]. Figure 3 presents the conductivity of the membranes as function of their IEC s. It is interesting to note that the trend of the evolution of conductivity with IEC flattens at high IEC , thereby indicating a saturation effect.…”

Section: Resultsmentioning

confidence: 99%

Study of Anion Exchange Membrane Properties Incorporating N-spirocyclic Quaternary Ammonium Cations and Aqueous Organic Redox Flow Battery Performance

et al. 2021

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Flexible cross-linked anion exchange membranes (AEMs) based on poly (p-phenylene oxide) grafted with N-spirocyclic quaternary ammonium cations were synthesized via UV-induced free-radical polymerization by using diallylpiperidinium chloride as an ionic monomer. Five membranes with ion exchange capacity (IEC) varying between 1.5 to 2.8 mmol Cl−·g−1 polymer were obtained and the correlation between IEC, water uptake, state of water in the membrane and ionic conductivity was studied. In the second part of this study, the influence of properties of four of these membranes on cell cycling stability and performance was investigated in an aqueous organic redox flow battery (AORFB) employing dimethyl viologen (MV) and N,N,N-2,2,6,6-heptamethylpiperidinyl oxy-4-ammonium chloride (TMA-TEMPO). The influence of membrane properties on cell cycling stability and performance was studied. At low-current density (20 mA·cm−2), the best capacity retention was obtained with lower IEC membranes for which the water uptake, freezable water and TMA-TEMPO and MV crossover are low. However, at a high current density (80 mA·cm−2), membrane resistance plays an important role and a membrane with moderate IEC, more precisely, moderate ion conductivity and water uptake was found to maintain the best overall cell performance. The results in this work contribute to the basic understanding of the relationship between membrane properties and cell performance, providing insights guiding the development of advanced membranes to improve the efficiency and power capability for AORFB systems.

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“…) is significant, because many AEMs lose their conductivity upon the interaction with these species. 33 Importantly, the PiperION membrane shows a high conductivity even in the presence of these anions (Fig. 1C).…”

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confidence: 93%

“…The effect of humidity is rationalized by our previous observations on the interdependency between carbonate-ion conductivity and hydration/dehydration processes of AEMs, and points towards future engineering challenges. 33 To demonstrate the scalability of the cell design, we have performed measurements in a larger electrolyzer cell (A = 100 cm 2 , Fig. 3C).…”

mentioning

confidence: 99%

High carbonate ion conductance of a robust PiperION membrane allows industrial current density and conversion in a zero-gap carbon dioxide electrolyzer cell

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et al. 2020

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Structure-transport relationships of poly(aryl piperidinium) anion-exchange membranes: Eeffect of anions and hydration

Cited by 71 publications

References 83 publications

Operando cathode activation with alkali metal cations for high current density operation of water-fed zero-gap carbon dioxide electrolysers

Operando cathode activation with alkali metal cations for high current density operation of water-fed zero-gap carbon dioxide electrolysers

Study of Anion Exchange Membrane Properties Incorporating N-spirocyclic Quaternary Ammonium Cations and Aqueous Organic Redox Flow Battery Performance

High carbonate ion conductance of a robust PiperION membrane allows industrial current density and conversion in a zero-gap carbon dioxide electrolyzer cell

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