Crosslinked poly (isatin biphenyl spirofluorene) membranes for proton conduction over a wide temperature range from −40 to 160 °C

Wei, Wei; Dai, Yu; Xu, Shicheng; Wang, Jin; Liu, Huan; He, Ronghuan

doi:10.1016/j.ijhydene.2023.03.429

Cited by 10 publications

(1 citation statement)

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“…Different strategies have been proposed to prepare wide-temperature range PEMFCs with a high conductivity and low PA leaching. − Among these, graphene oxide (GO) is an attractive organic filler for PEMs as it contains closely located hydrophilic oxygen-containing functional groups (−O–, −OH, and −COOH) and two-dimensional channels that can be used to form hydrogen bonds to conduct protons. − …”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide-Intercalated Montmorillonite Layered Stack Incorporated into Poly(2,5-Benzimidazole) for Preparing Wide-Temperature Proton Exchange Membranes

Wang,

Ling,

et al. 2023

ACS Appl. Nano Mater.

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In this study, graphene oxide-intercalated montmorillonite (GO-MMT) layered stacks were introduced into a poly(2,5-benzimidazole) (ABPBI) matrix via in situ synthesis to prepare composite membranes (GO-MMT/ABPBI) for wide-temperature range (0−180 °C) fuel cell applications. After the introduction of GO-MMT nanocomposites, the ABPBI membranes showed improved tensile strength, water and phosphoric acid retention ratio, and proton conductivity. The GO-MMT/ABPBI membrane was highly conductive when operated from 0 to 180 °C and attained proton conductivities of 50.3 mS/cm (0% RH/180 °C) and 38.3 mS/cm (98% RH/90 °C), respectively, which were about 1.6 and 1.7 times those of the pristine ABPBI membrane under the same conditions. This improved performance was because the nanolayered stacks of GO-MMT confined phosphoric acid and water within its interchannels via hydrogen bonds. This paper demonstrates the potential application of composite membranes in fuel cells with a wide operating temperature range.

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