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Development of Hierarchically Porous Ionomer Membranes for Versatile and Fast Metal Ion Conduction
- Source :
- ACS Omega, 4 (2), ACS Omega, ACS Omega, Vol 4, Iss 2, Pp 2684-2692 (2019)
- Publication Year :
- 2019
- Publisher :
- American Chemical Society, 2019.
-
Abstract
- Innovative design concepts can play a key role in the realization of high-performance ionomer membranes that are capable of exclusive metal ion conduction and potentially applicable in electrochemical devices including sensors, fuel cells, and high-energy batteries. Herein, we report on the development of new ionomers, based on sulfonated poly(ether ether ketone) (SPEEK), engineered to conduct a variety of ions, namely, Li+, Na+, K+, Zn2+, and Mg2+, when soaked with nonaqueous solvents. Application of a facile phase-inversion method results in M-SPEEK (M = Li/Na/K/Zn/Mg) membranes with a hierarchical porous network, facilitating organic solvent infusion that is necessary to promote dissociation and rapid transport of cations between anionic sulfonate groups on the polymer chains. This strategy leads to membranes with alkali ion conductivities approaching 10–4 S cm–1 at room temperature, and near unity cation transference numbers (tM+ ≥ 0.9). Furthermore, an exceptionally high Zn-ion conductivity of 10–2 S cm–1 is obtained for the water-infused Zn-SPEEK membrane. In comparison, the dense membranes demonstrate 2–3 orders of magnitude lower conductivities because of insufficient solvent infusion. Preliminary electrochemical studies with solvent-infused ionomer membranes as the electrolyte look promising.<br />ACS Omega, 4 (2)<br />ISSN:2470-1343
- Subjects :
- Thermal properties
Materials science
Alkali metals
General Chemical Engineering
Materials Science
Mechanical properties
Solvation
Ether
02 engineering and technology
010402 general chemistry
Electrochemistry
01 natural sciences
Article
Dissociation (chemistry)
Ion
lcsh:Chemistry
Batteries
chemistry.chemical_compound
Polymer morphology
Distribution function
Analytical chemistry
Fuel cells
Inorganic chemistry
Polyethers
Porosity
Redox potential
Transport phenomena (Physical chem.)
Ionomer
chemistry.chemical_classification
General Chemistry
Polymer
021001 nanoscience & nanotechnology
0104 chemical sciences
Sulfonate
Membrane
lcsh:QD1-999
chemistry
Chemical engineering
0210 nano-technology
Subjects
Details
- Language :
- English
- ISSN :
- 24701343
- Database :
- OpenAIRE
- Journal :
- ACS Omega, 4 (2), ACS Omega, ACS Omega, Vol 4, Iss 2, Pp 2684-2692 (2019)
- Accession number :
- edsair.doi.dedup.....701f9d3e50eef999227dac6bbd2ab522