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Title: More sustainable electricity generation in hot and dry fuel cells with a novel hybrid membrane of Nafion/nano-silica/hydroxyl ionic liquid

Abstract

Here, a new hybrid proton exchange membrane (PEM) has been prepared from hydroxyl functionalized imidazolium ionic liquid (IL-OH), Nafion and nano-SiO 2. The IL-OH, with a hydroxyl group that acts as both a proton acceptor and donor, forms strong hydrogen bonds with both Nafion and nano-SiO 2, resulting in an effective hydrogen bond network in the ternary membrane. Such an anhydrous hydrogen-bond network, which is unknown previously, endows the PEMs with higher proton conductivity, greater thermal stability and surprisingly a more robust mechanical performance than PEMs consisting of conventional ionic liquids. The resulting PEMs have a tensile strength that is more than twice as strong as recast Nafion and an anhydrous ionic conductivity of ~55 mS cm –1 at temperatures above 160 °C, with a proton transfer number of ~0.9. A laboratory assembled H 2–O 2 fuel cell employing this new PEM delivered a power density of 340 and 420 mW cm –2 at 160 and 180 °C, respectively.

Authors:
 [1];  [1];  [2];  [1];  [1];  [1];  [3];  [2];  [4]
  1. Wuhan Univ. (China)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Wuhan Univ. (China); Univ. of Nottingham Ningbo China (China)
  4. Wuhan Univ. (China); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Fluid Interface Reactions, Structures and Transport Center (FIRST)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Natural Science Foundation of China (NNSFC); Ministry of Education of China (MOE)
OSTI Identifier:
1388374
Alternate Identifier(s):
OSTI ID: 1323972
Grant/Contract Number:  
ERKCC61; 21173161
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Applied Energy
Additional Journal Information:
Journal Volume: 175; Journal Issue: C; Related Information: FIRST partners with Oak Ridge National Laboratory (lead); Argonne National Laboratory; Drexel University; Georgia State University; Northwestern University; Pennsylvania State University; Suffolk University; Vanderbilt University; University of Virginia; Journal ID: ISSN 0306-2619
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; proton exchange membranes; hydroxyl ionic liquids; hydrogen-bonds; Nafion; intermediate-temperature fuel cells; catalysis (heterogeneous); solar (fuels); energy storage (including batteries and capacitors); hydrogen and fuel cells; electrodes - solar; mechanical behavior; charge transport; materials and chemistry by design; synthesis (novel materials)

Citation Formats

Li, Yan, Shi, Yan, Mehio, Nada, Tan, Mingsheng, Wang, Zhiyong, Hu, Xiaohong, Chen, George Z., Dai, Sheng, and Jin, Xianbo. More sustainable electricity generation in hot and dry fuel cells with a novel hybrid membrane of Nafion/nano-silica/hydroxyl ionic liquid. United States: N. p., 2016. Web. doi:10.1016/j.apenergy.2016.03.075.
Li, Yan, Shi, Yan, Mehio, Nada, Tan, Mingsheng, Wang, Zhiyong, Hu, Xiaohong, Chen, George Z., Dai, Sheng, & Jin, Xianbo. More sustainable electricity generation in hot and dry fuel cells with a novel hybrid membrane of Nafion/nano-silica/hydroxyl ionic liquid. United States. doi:10.1016/j.apenergy.2016.03.075.
Li, Yan, Shi, Yan, Mehio, Nada, Tan, Mingsheng, Wang, Zhiyong, Hu, Xiaohong, Chen, George Z., Dai, Sheng, and Jin, Xianbo. Thu . "More sustainable electricity generation in hot and dry fuel cells with a novel hybrid membrane of Nafion/nano-silica/hydroxyl ionic liquid". United States. doi:10.1016/j.apenergy.2016.03.075. https://www.osti.gov/servlets/purl/1388374.
@article{osti_1388374,
title = {More sustainable electricity generation in hot and dry fuel cells with a novel hybrid membrane of Nafion/nano-silica/hydroxyl ionic liquid},
author = {Li, Yan and Shi, Yan and Mehio, Nada and Tan, Mingsheng and Wang, Zhiyong and Hu, Xiaohong and Chen, George Z. and Dai, Sheng and Jin, Xianbo},
abstractNote = {Here, a new hybrid proton exchange membrane (PEM) has been prepared from hydroxyl functionalized imidazolium ionic liquid (IL-OH), Nafion and nano-SiO2. The IL-OH, with a hydroxyl group that acts as both a proton acceptor and donor, forms strong hydrogen bonds with both Nafion and nano-SiO2, resulting in an effective hydrogen bond network in the ternary membrane. Such an anhydrous hydrogen-bond network, which is unknown previously, endows the PEMs with higher proton conductivity, greater thermal stability and surprisingly a more robust mechanical performance than PEMs consisting of conventional ionic liquids. The resulting PEMs have a tensile strength that is more than twice as strong as recast Nafion and an anhydrous ionic conductivity of ~55 mS cm–1 at temperatures above 160 °C, with a proton transfer number of ~0.9. A laboratory assembled H2–O2 fuel cell employing this new PEM delivered a power density of 340 and 420 mW cm–2 at 160 and 180 °C, respectively.},
doi = {10.1016/j.apenergy.2016.03.075},
journal = {Applied Energy},
issn = {0306-2619},
number = C,
volume = 175,
place = {United States},
year = {2016},
month = {3}
}

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