nz7b00560_si_001.pdf (3.23 MB)
Synergistic Conductivity Effect in a Proton Sources-Coupled Metal–Organic Framework
journal contribution
posted on 2017-09-11, 00:00 authored by Xiao-Min Li, Long-Zhang Dong, Shun-Li Li, Gang Xu, Jiang Liu, Feng-Ming Zhang, Li-Shi Lu, Ya-Qian LanA water-stable metal–organic
framework (MOF)-based composite,
H2SO4@MIL-101-SO3H, configured with
functionalized sulfonate groups bound to the polymeric backbone and
nonvolatile strong acid H2SO4 encapsulated into
pores, is demonstrated as a superior proton-conducting material, owing
to the resultant multiple proton-transfer pathways. This solid material
exhibits a superprotonic conductivity of 1.82 S cm–1 (70 °C, 90% RH) that is comparable to that of other excellent
MOF-based proton conductors reported thus far. More importantly, the
splendid conductivity (0.92 × 10–2 S cm–1, −40 °C) of the title material achieves
an enormous improvement compared with that of all proton-conducting
systems demonstrated at subzero temperatures.