Porous Proton Exchange Membrane with High Stability and Low Hydrogen Permeability Realized by Dense Double Skin Layers Constructed with Amino tris (methylene phosphonic acid)

Wen Li; Wen Liu; Jin ZhangHaining WangShanfu LuYan Xiang

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Porous Proton Exchange Membrane with High Stability and Low Hydrogen Permeability Realized by Dense Double Skin Layers Constructed with Amino tris (methylene phosphonic acid)

机译：Porous Proton Exchange Membrane with High Stability and Low Hydrogen Permeability Realized by Dense Double Skin Layers Constructed with Amino tris (methylene phosphonic acid)

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Porous proton exchange membranes (PEMs) with abundant porous structuresshow enhanced phosphoric acid (PA) doping levels and protontransport capability. However, the high PA loss rate and serious hydrogencross-over lead to poor membrane stability. Enhancing the stability ofPA-doped porous PEMs is therefore crucial for obtaining high-performanceproton exchange membrane fuel cells. Herein, a porous polybenzimidazolemembrane with dense double skin layers is reported using amino tris(methylene phosphonic acid) (ATMP) constructed. This membrane effectivelyalleviates hydrogen permeation and PA loss in a water/anhydrous environmentand exhibits enhanced stability. Surprisingly, as an organic protonconductor, ATMP has strong hydrogen bonding with PA, leading to the formationof more continuous proton transport channels. Due to the dense doubleskin layers protection and the synergistic mass transfer of ATMP and PA, theporous membrane shows excellent proton conductivity (0.112 S cm~(?1)) and aH_2-O_2 fuel cell peak power density of 0.98 W cm~(?2) at 160 ℃. Moreover, it presentsexcellent fuel cell stability, with a voltage decay rate of only 5.46 μV h~(?1).In addition, the porous membrane surpasses the traditional working temperaturerange, operating in the range of 80-220 ℃. This study provides newinsight into developing high-performance porous PEMs.

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来源
《Advanced functional materials》 |2023年第6期|2210036.1-2210036.12|共12页
作者
Wen Li; Wen Liu; Jin ZhangHaining WangShanfu LuYan Xiang;
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Beijing Key Laboratory of Bio-Inspired Energy Materials and Devices School of Space and Environment Beihang University Beijing 100191, P. R. China;

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amino tris (methylene phosphonic acid); fuel cells; high-temperature proton exchange membranes; phosphoric acid;

Porous Proton Exchange Membrane with High Stability and Low Hydrogen Permeability Realized by Dense Double Skin Layers Constructed with Amino tris (methylene phosphonic acid)

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