A novel proton exchange membrane with long-range ordered proton transport pathways through modulation of interfacial interactions via amino-functionalized polyhedral oligomeric silsesquioxane-grafted graphene oxide

Recent advances in non-perfluorinated sulfonic acid proton exchange membranes in the energy field

“…However, attention should be paid to the specific gravity of the doped material during group incorporation; otherwise, proton conduction may be hindered. The SP/OA-POSS- g -GO-2 membrane prepared by Guan et al 15 exhibited the highest proton conductivity of 209.6 mS cm −1 under conditions of 80 °C and 95% RH, attributed to the good dispersion of OA-POSS on GO and the formation of ordered acid–base pairs with SPEEK, which is conducive to the construction of continuous ion channels. GO, serving as a carrier, promotes the formation of long-range proton conduction pathways within the membrane (Fig.…”

“…The preparation process of NPFSA-PEM typically involves attaching the sulfonic acid functional group to the polymer substrate in a specific manner, 12–14 followed by post-treatments, such as increasing the sulfonic acid functional group content or adding additives, 11,15 to enhance proton conduction performance and stability before preparing the membrane using solution-casting method. 7,16 With the continuous development of interdisciplinary research in nanotechnology and polymer materials, the structure and performance of NPFSA-PEM have further been optimized and improved.…”

Construction of Ion-Conducting Channels with Surface-Functionalized Carbon Nanotubes in Gel/Solid Polymer Electrolytes for Lithium-Ion Batteries

“…In addition to the diffusion mode, ions/molecules might be transported through a hopping mode, in which the transported ions/molecules consecutively bind/debind between chemical groups having certain affinity with the transported ions/molecules . Based on its relatively high transportation efficiency, the hopping mode has been widely applied to molecular and structural designs of polyelectrolytes and the corresponding proton exchange membranes (PEMs). − Phase-separated sulfuric acid-rich domains in PEMs served as the binding sites to accomplish the hopping transportation of protons . Moreover, building up continuous pathways for mass conduction in the matrixes could demonstrate a high efficiency of mass transport within the tunneling mode.…”