Strategic hierarchical improvement of superprotonic conductivity in a stable metal-organic framework system
Li, XM (Li, Xiao-Min)[ 1 ] ; Liu, J (Liu, Jiang)[ 1 ]*（刘江）; Zhao, C (Zhao, Chen)[ 1 ] ; Zhou, JL (Zhou, Jia-Lin)[ 1 ] ; Zhao, L (Zhao, Ling)[ 2 ]*; Li, SL (Li, Shun-Li)[ 1 ] ; Lan, YQ (Lan, Ya-Qian)[ 1 ]*（兰亚乾）

[ 1 ] Nanjing Normal Univ, Sch Chem & Mat Sci, Nanjing 210023, Jiangsu, Peoples R China
[ 2 ] China Univ Geosicences, Dept Mat Sci & Chem, Wuhan 430074, Hubei, Peoples R China

JOURNAL OF MATERIALS CHEMISTRY A，201911,7(43), 25165-25171

Identification of proton-exchange membranes (PEMs) with high proton conductivity and long-term durability is highly important for the development of fuel cells. Herein, an efficient and feasible strategy that features different proton sources and hopping site modifications on the stable UiO-66-NH2 framework for hierarchically improving the proton conductivity is demonstrated. As a result, IM-UiO-66-AS showed the highest superprotonic conductivity of 1.54 x 10(-1) S cm(-1) (80 degrees C, 98% RH) and outstanding long-term durability of at least 100 h, which surpass those of all the reported proton-conducting MOF materials without guest loading. Furthermore, the manufactured membrane could maintain a high proton conductivity of 1.19 x 10(-2) S cm(-1) even with continuous work for at least 40 h under the same conditions, suggesting its great potential for further application in devices.

文章链接：
https://pubs.rsc.org/en/content/articlelanding/2019/TA/C9TA10286H#!divAbstract

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