TY - JOUR
T1 - Influence of incorporation of Zeolitic Imidazolate Framework-67 on the performance and stability of sulfonated Polyvinylidene fluoride proton exchange membrane for fuel cell applications
AU - Divya, Kumar
AU - Asghar, Muhammad Rehman
AU - Bhuvanendran, Narayanamoorthy
AU - Liu, Huiyuan
AU - Zhang, Weiqi
AU - Xu, Qian
AU - Lee, Sae Youn
AU - Su, Huaneng
N1 - Publisher Copyright:
© 2024 Elsevier B.V.
PY - 2024/6
Y1 - 2024/6
N2 - In pursuit of enhanced methanol tolerance and thermal stability, a cost-effective solution was developed by integrating varied proportions of zeolitic imidazolate framework-67 (ZIF-67), a metal-organic framework, into a sulfonated polyvinylidene fluoride (SPVDF) matrix-based proton exchange membrane (PEM). Through comprehensive characterization, the uniform dispersion and chemical functionalities of SPVDF and ZIF-67 was confirmed by Scanning electron microscopy(SEM), Fourier transform infrared spectroscopy (FT-IR) respectively. This uniform dispersion is attributed by the electrostatic interaction between the –NH2 group of Himm unit and -SO3H group of SPVDF create a strong hydrogen bonding network (i.e. acid-base pair) resulted in improved membrane surface hydrophilicity, water uptake, proton conductivity. Further the incorporation of ZIF-67 led to a composite membrane with significantly lower methanol permeability (1.5 × 10−7 cm2 s−1) compared to Nafion 117 (20 × 10−7 cm2 s−1). For glass transition and crystallization behavior of SPVDF-1 showed good miscibility enhance the membrane thermal and mechanical stability. This reduction is attributed to the presence of a large active surface area with small pores acting as a barrier against methanol permeation. Furthermore, single-cell tests in a direct methanol fuel cell (DMFC) demonstrated that the SPVDF-1 membrane achieves a maximum power density of 82.4 mW cm−2, surpassing that of Nafion 117 (75.9 mW cm−2). These results underscore the potential of the developed SPVDF-1 membrane as a promising alternative for DMFC applications.
AB - In pursuit of enhanced methanol tolerance and thermal stability, a cost-effective solution was developed by integrating varied proportions of zeolitic imidazolate framework-67 (ZIF-67), a metal-organic framework, into a sulfonated polyvinylidene fluoride (SPVDF) matrix-based proton exchange membrane (PEM). Through comprehensive characterization, the uniform dispersion and chemical functionalities of SPVDF and ZIF-67 was confirmed by Scanning electron microscopy(SEM), Fourier transform infrared spectroscopy (FT-IR) respectively. This uniform dispersion is attributed by the electrostatic interaction between the –NH2 group of Himm unit and -SO3H group of SPVDF create a strong hydrogen bonding network (i.e. acid-base pair) resulted in improved membrane surface hydrophilicity, water uptake, proton conductivity. Further the incorporation of ZIF-67 led to a composite membrane with significantly lower methanol permeability (1.5 × 10−7 cm2 s−1) compared to Nafion 117 (20 × 10−7 cm2 s−1). For glass transition and crystallization behavior of SPVDF-1 showed good miscibility enhance the membrane thermal and mechanical stability. This reduction is attributed to the presence of a large active surface area with small pores acting as a barrier against methanol permeation. Furthermore, single-cell tests in a direct methanol fuel cell (DMFC) demonstrated that the SPVDF-1 membrane achieves a maximum power density of 82.4 mW cm−2, surpassing that of Nafion 117 (75.9 mW cm−2). These results underscore the potential of the developed SPVDF-1 membrane as a promising alternative for DMFC applications.
KW - Acid-base pair
KW - Methanol permeability
KW - Proton conductivity
KW - Sulfonated polyvinylidene fluoride (SPVDF)
KW - Zeolitic imidazolate framework-67 (ZIF-67)
UR - http://www.scopus.com/inward/record.url?scp=85189678530&partnerID=8YFLogxK
U2 - 10.1016/j.reactfunctpolym.2024.105903
DO - 10.1016/j.reactfunctpolym.2024.105903
M3 - Article
AN - SCOPUS:85189678530
SN - 1381-5148
VL - 199
JO - Reactive and Functional Polymers
JF - Reactive and Functional Polymers
M1 - 105903
ER -