Engineering ionic conductivity of ionomeric membranes: influence of Van der Waals volume of counterions and temperature

Almomani, Abdallah; Granadillo, Luis; Hong, Wei; Montazami, Reza

doi:10.1088/2053-1591/aacb64

Cited by 3 publications

(3 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The increase in proton conductivity with temperature can be observed as a general trend for all the studied samples. As expected from what was discussed in other works [35,52,55,56], the mobility of protons within the membranes is favored at higher temperatures due to the easier passing of the corresponding energy barrier. The proton conductivity results of Nafion ® 212, SGO, GONS, and BSGO, extrapolated from electrochemical impedance spectroscopy tests, are illustrated in Figure 6.…”

Section: Functional Propertiessupporting

confidence: 81%

See 1 more Smart Citation

Functional and Environmental Performances of Novel Electrolytic Membranes for PEM Fuel Cells: A Lab-Scale Case Study

et al. 2023

View full text Add to dashboard Cite

Despite being the most employed polymer electrolyte for proton exchange membrane fuel cells (PEMFCs), Nafion® has several limitations: expensiveness, poor performance when exposed to temperatures higher than 80 °C, and its potential as a source of environmentally persistent and toxic compounds (i.e., per- and polyfluoroalkyl substances, known as PFASs) when disposed of. This work explores the functional and environmental performances of three potential PFAS-free alternatives to Nafion® as electrolytic membranes in PEMFCs: sulfonated graphene oxide (SGO), graphene oxide-naphthalene sulfonate (GONS), and borate-reinforced sulfonated graphene oxide (BSGO). Investigated via ATR-FTIR spectroscopy, TGA, and cross-sectional SEM, the membranes show an effective functionalization of GO and good thermal stability. Functional properties are determined via Ion Exchange Capacity (IEC) evaluation, Electrochemical Impedance Spectroscopy, and tensile tests. In terms of IEC, the innovative materials outperform Nafion® 212. Proton conductivities at 80 °C of SGO (1.15 S cm−1) and GONS (1.71 S cm−1) are higher than that of the commercial electrolyte (0.56 S cm−1). At the same time, the membranes are investigated via Life Cycle Assessment (LCA) to uncover potential environmental hotspots. Results show that energy consumption during manufacture is the main environmental concern for the three membranes. A sensitivity analysis demonstrates that the impact could be significantly reduced if the production procedures were scaled up. Among the three alternatives, SGO shows the best trade-off between proton conductivity and environmental impact, even though performance results from real-life applications are needed to determine the actual environmental consequences of replacing Nafion® in PEMFCs.

show abstract

Section: Functional Propertiessupporting

confidence: 81%

Section: Functional Propertiessupporting

confidence: 81%

Functional and Environmental Performances of Novel Electrolytic Membranes for PEM Fuel Cells: A Lab-Scale Case Study

et al. 2023

View full text Add to dashboard Cite

show abstract

“…When the Nyquist curves are evaluated, it is clearly seen that the semi‐circle gets smaller as the temperature increases. Because of the rising up in kinetic energy as the temperature increases, [31] the conductivity of the membrane enhances and reaches 9.8×10 −4 Scm −1 at 80 °C. In the study of Sanginov et al., it was observed that the conductivity increases with the increase in temperature [32] .…”

Section: Electrochemical Analysis Of Membranesmentioning

confidence: 99%

Nafion/Aquivion‐Based Composite Lithium Ion Exchange Membranes for High Capacity Li‐S Batteries

2022

View full text Add to dashboard Cite

Lithiated Nafion (Li‐Naf) and lithiated Aquivion (Li‐Aqu) ion exchange membranes are applied as electrolyte and separator to prevent the polysulfide shuttle effect in Li−S batteries. The production and characterization of Li‐Naf, Li‐Aqu, and their composites (2 : 1, 1 : 1, and 1 : 2; w/w) are carried out. The ion exchange capacity and polysulfide transition of the produced membranes are examined and structural characterizations are conducted via Fourier transform infrared spectroscopy (FTIR), X‐ray diffraction (XRD), thermogravimetric analysis (TGA) and field emission scanning electron microscopy (FESEM). CR2032 half cells are assembled in order to perform electrochemical analysis. The electrochemical performances of the membranes are investigated by cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge‐discharge tests. Due to the low equivalent weight of Aquivion, the ion exchange capacity and ionic conductivity of the membrane enhance with the increasing amount of Li‐Aqu in the composite membrane. Because of the synergistic effect of Nafion and Aquivion, Li‐Naf : Li‐Aqu/1 : 2 composite offers 61.2 % capacity retention and the best electrochemical discharge capacity of 826 mAhg−1 after 100 charge‐discharge cycles. As a result, Nafion and Aquivion composite membranes can successfully inhibit the shuttle movement of negatively charged polysulfide species while allowing the transition of positively charged lithium ions for high performed Li−S batteries.

show abstract

Ionic conductivity of gamma-Al2O3 and Pb3O4 dopants in 8mol%YSZ as electrolyte in SOFC

Al-Attar¹,

Farid²,

Hashim³

2019

TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES19Gr

View full text Add to dashboard Cite

Engineering ionic conductivity of ionomeric membranes: influence of Van der Waals volume of counterions and temperature

Cited by 3 publications

References 29 publications

Functional and Environmental Performances of Novel Electrolytic Membranes for PEM Fuel Cells: A Lab-Scale Case Study

Functional and Environmental Performances of Novel Electrolytic Membranes for PEM Fuel Cells: A Lab-Scale Case Study

Nafion/Aquivion‐Based Composite Lithium Ion Exchange Membranes for High Capacity Li‐S Batteries

Ionic conductivity of gamma-Al2O3 and Pb3O4 dopants in 8mol%YSZ as electrolyte in SOFC

Contact Info

Product

Resources

About