首页|Bioinspired supramolecular macrocycle hybrid membranes with enhanced proton conductivity

Bioinspired supramolecular macrocycle hybrid membranes with enhanced proton conductivity

扫码查看
原文链接
  • 万方数据
  • 维普
Enhancing the proton conductivity of proton exchange membranes(PEMs)is essential to expand the applications of proton exchange membrane fuel cells(PEMFCs).Inspired by the proton conduction mechanism of bacteriorhodopsin,cucurbit[n]urils(CB[n].where n is the number of glycoluril units,n=6,7,or 8)are introduced into sulfonated poly(ether ether ketone)(SPEEK)matrix to fabricate hybrid PEMs,employing a nature-inspired chemical engineering(NICE)methodology.The carbonyl groups of CB[n]act as proton-conducting sites,while the host-guest interaction between CB[n]and water molecules offers extra proton-conducting pathways.Additionally,the molecular size of CB[n]aids in their dispersion within the SPEEK matrix,effectively bridging the unconnected proton-conducting sulfonic group domains within the SPEEK membrane.Consequently,all hybrid membranes exhibit significantly enhanced proton conductivity.Notably,the SPEEK membrane incorporating 1 wt.％CB[8](CB[8]/SPEEK-1％)demonstrates the highest proton conductivity of 198.0 mS·cm-1 at 60 ℃ and 100％relative humidity(RH),which is 228％greater than that of the pure SPEEK membrane under the same conditions.Moreover,hybrid membranes exhibit superior fuel cell performance.The CB[8]/SPEEK-1％membrane achieves a maximum power density of 214 mW·cm-2,representing a 140％improvement over the pure SPEEK membrane(89 mW·cm-2)at 50 ℃ and 100％RH.These findings serve as a foundation for constructing continuous proton-conducting pathways within membranes by utilizing supramolecular macrocycles as fuel cell electrolytes and in other applications.

supramolecular macrocycleproton conductivitycucurbit[n]urilproton exchange membranefuel cell

Pengfei Yang、Linlin Xu、Panagiotis Trogadas、Marc-Olivier Coppens、Yang Lan

展开 >

Centre for Nature Inspired Engineering,Department of Chemical Engineering,University College London,London WC1E 7JE,UK

Royal SocietyEngineering and Physical Sciences Research CouncilEngineering and Physical Sciences Research CouncilEngineering and Physical Sciences Research Council

RGS\R2\202203Lan_4824933EP/N509577/1EP/T517793/1EP/S03305X/1

2024

10.1007/s12274-023-6009-z

纳米研究(英文版)

纳米研究(英文版)

CSTPCD
ISSN：
年,卷(期)：2024.17(2)
  • 50