Supporting Information Porous Nafion nanofiber composite membrane with vertical pathways for efficient through-plane proton conduction Jingtao Wang a , Ping Li a , Yafang Zhang a , Yarong Liu a , Wenjia Wu a,b,* , Jindun Liu a a School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, P. R. China b Department of Civil and Environmental Engineering, Center for the Environmental Implications of NanoTechnology (CEINT), Duke University, Durham, North Carolina 27708, USA *To whom correspondence should be addressed. E-mail: [email protected]
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ars.els-cdn.com · Web viewa School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, P. R. China b Department of Civil and Environmental Engineering, Center
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Supporting Information
Porous Nafion nanofiber composite membrane with vertical
pathways for efficient through-plane proton conduction
a School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, P. R. Chinab Department of Civil and Environmental Engineering, Center for the Environmental Implications of NanoTechnology (CEINT), Duke University, Durham, North Carolina 27708, USA
*To whom correspondence should be addressed. E-mail: [email protected]
Fig. S1. Chemical structure of (a) long alkyl chain contained [C8mim][Tf2N] and (b) short alkyl chain contained [C2mim][Tf2N].
Fig. S2. SEM images of (a) NF/PAN and (b) NF/PAN-C8-20(with).
Fig. S3. High-resolution SEM images of (a) NF/PAN-C8-15, (b) NF/PAN-C8-20, (c) NF/PAN-C8-
25, (d) NF/PAN-C2-15, (e) NF/PAN-C2-20, and (f) NF/PAN-C2-25.
Fig. S4. Nitrogen adsorption/desorption isotherms of (a) NF/PAN and NF/PAN-C8-X and (b) NF/PAN and NF/PAN-C2-X.
100 200 300 400 500 600 700 80040
60
80
100
Wei
ght (
%)
Temperature (oC)
NF/PAN NF/PAN-C2-15 NF/PAN-C2-20 NF/PAN-C2-25
b
0.0
0.5
1.0
1.5
2.0 NF/PAN-C2-25
IEC
(mm
ol g
-1)
NF/PANc
48h24h12h6h2400 2100 1800 1500 1200 900 600
*571*
Tran
smitt
ance
(a.u
.)
Wave number (cm-1)
1195
NF/PAN
NF/PAN-C2-25(with)
NF/PAN-C2-25
1058(SO3H)a
Fig. S5. (a) FTIR spectra of NF/PAN, NF/PAN-C2-25(with), and NF/PAN-C2-25. (b) TGA curves of NF/PAN and NF/PAN-C2-X. (c) dynamic IEC values of NF/PAN and NF/PAN-C2-25 as a
function of testing time.
Fig. S6. Stress–strain curves of CS/NF/PAN and CS/NF/PAN-C2-X.
Fig. S7. IEC values of CS/NF/PAN and CS/NF/PAN-C2-X.
Fig. S8. (a) Water uptake and (b) volume swelling of CS/NF/PAN and CS/NF/PAN-C8-X.
Fig. S9. (a) Water uptake and (b) volume swelling of CS/NF/PAN and CS/NF/PAN-C8-X.
Fig. S10. TGA curves of CS/NF/PAN and CS/NF/PAN-C8-X.
Fig. S11. Arrhenius-plots of (a) perpendicular conductivity (σ⊥) and (b) parallel conductivity (σ∥) of CS/NF/PAN and CS/NF/PAN-C8-X under 0 % RH.