Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 42, Pages 28955-28963Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b07467
Keywords
CNT/GONR nanocomposite; ID/2D; Nafion; PEM; ionic nanochannel
Funding
- National Natural Science Foundation of China (NSFC) [21276051]
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In the current study, carbon nanotube/graphene oxide nanoribbon (CNT/GONR) composites were obtained via a chemical unzipping method. Then novel CNT/GONR Nafion composite proton exchange membranes (PEMs) were prepared via a blending method. The CNT/GONR nanocomposites induce the adjustment of (-SO3-)(n) ionic clusters in Nafion matrix to construct long-range ionic nanochannels and keep the activity of ionic clusters at the same time. This dramatically promotes the proton transport of the CNT/GONR Nafion composite PEMs at low humidity and high temperature. The proton conductivity of the composite PEM with 0.5 wt % CNT/GONR is as high as 0.18 S.cm(-1) at 120 degrees C and 40%RH, nine times of recast Nafion (0.02 S.cm(-1)) at the same conditions. The 1D/2D nanostructure of CNT/GONR nanocomposite also contributes to restrain the methanol permeability of CNT/GONR Nafion. The composite PEM shows a one-order-of-magnitude decrease (2.84 X 10(-69) cm(2).s(-1)) in methanol permeability at 40 degrees C. Therefore, incorporation of this 1D/2D nanocomposite into Nafion PEM is a feasible pathway to conquer the trade-off effect between proton conductivity and methanol resistance.
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