Anion conductive poly(arylene ether sulfone)s containing tetra-quaternary ammonium hydroxide on fluorenyl group for alkaline fuel cell application

Fluorenyl‐containing Quaternary Ammonium Poly(arylene ether sulfone)s for Anion Exchange Membrane Applications

“…As noted in Table 1, the λ values were also determined by the IEC and hydrophilic block length. The increased hydration number and greater IEC indicated increased connectivity of a polymer's hydrophilic domain 29, 31. For the QA‐bQPAES(20/10) series, an obvious turning point was found around 2.0 mmol g −1 where an abrupt increase in water uptake shows.…”

“…However, the fundamental challenge of improving the ion conductivity of the AEMs is still on‐going. Recently, poly(aryl ether)s‐based AEMs with several (> 2) ionic groups per polymer repeating unit have shown good potentials 13, 14, 25–31. Li and co‐workers synthesized a series of poly(arylene ether)s containing quaternary ammonium functionalized tetraphenyl methane moieties, the resultant AEMs showed ion conductivity of 20 mS cm −1 at 20 °C and 75 mS cm −1 at 80 °C 25.…”

“…Li and co‐workers synthesized a series of poly(arylene ether)s containing quaternary ammonium functionalized tetraphenyl methane moieties, the resultant AEMs showed ion conductivity of 20 mS cm −1 at 20 °C and 75 mS cm −1 at 80 °C 25. Among the developed materials, the AEMs containing fluorenyl groups drew much attentions attributing to its typical structure 13, 14, 27–31. Maximum four ionic groups could be introduced to one repeating unit of the polymer main chain because of their high electron density; in addition, the ionic groups could be adjusted to link to the backbone phenyl rings and/or the pendant phenyl rings by monomer selection.…”

Dual-cation comb-shaped anion exchange membranes: Structure, morphology and properties

“…Over the last decade, numerous strategies [6][7][8][9][10][11] have been developed aiming to achieve good nano-phase separation and well-connected ion conducting channels. For example, Jannasch and co-workers [9] found that by densely grafting the quaternary ammonium groups (QA groups) onto one particular segment of polymer backbones, the nano-phase separation ability and the hydroxide conductivity could be enhanced because of the increased hydrophilic-hydrophobic discrimination [9,[12][13][14][15][16]. Bai and Contents lists available at ScienceDirect journal homepage: www.elsevier.com/locate/memsci co-workers also reported one highly conductive AEM with three QA groups locating on one pendent phenyl ring [17].…”

CO-sensing Properties of Potentiometric Gas Sensors Using an Anion-conducting Polymer Electrolyte and Au-loaded Metal Oxide Electrodes

“…Highly conductive anion-conducting polymers (ACP) have recently been developed by some researchers and companies, and their large OH -conductivities and improved long-term stabilities were quite attractive for an electrolyte of polymer-electrolyte fuel cells (PEFCs) [1][2][3][4][5]. For example, Matsumoto et al have reported that the PEFCs using an ACP electrolyte showed high current density as well as high power density with relatively low overpotential [6], and their properties except for the long-term stability have been already comparable to those of PEFCs using proton-conducting polymers such as Nafion ® , which has been put into practical use.…”