Related Experiment Video
Updated: Oct 12, 2025
07:55
Ion-Exchange Membranes for the Fabrication of Reverse Electrodialysis Device
Published on: July 20, 2021
11.0K
Crosslinked Sulfonated Polyphenylsulfone (CSPPSU) Membranes for Elevated-Temperature PEM Water Electrolysis.
1Research Center for Functional Materials, Functional Clay Materials Group, National Institute for Materials Science (NIMS), 1-1 Namiki, Ibaraki, Tsukuba 305-0044, Japan.
Membranes
|November 27, 2021
Summary
This study introduces crosslinked sulfonated polyphenylsulfone (CSPPSU) membranes for high-temperature water electrolysis. These non-fluorinated membranes show excellent stability and potential for efficient hydrogen production.
Area of Science:
- Materials Science
- Electrochemistry
- Chemical Engineering
Background:
- Growing environmental concerns necessitate alternatives to fluorinated membranes in water electrolysis.
- Hydrocarbon-based electrolyte membranes are emerging as promising sustainable options.
- Elevated-temperature water electrolysis offers efficiency gains but requires robust membrane materials.
Purpose of the Study:
- To investigate the properties of novel crosslinked sulfonated polyphenylsulfone (CSPPSU) membranes for elevated-temperature water electrolysis.
- To evaluate the thermal and chemical stability of CSPPSU membranes under demanding conditions.
- To assess the performance of CSPPSU membranes in a water electrolysis setup.
Main Methods:
- Preparation of CSPPSU membranes via sulfonation and crosslinking of polyphenylsulfone (PPSU).
- Assessment of membrane stability using long-term immersion tests at 85 °C and 150 °C.
- Structural stability analysis using small-angle X-ray scattering (SAXS) from room temperature to 180 °C.
- Performance evaluation in water electrolysis at 150 °C with IrO2/Ti electrodes.
Main Results:
- CSPPSU membranes exhibited excellent sulfone group stability at 85 °C (3600 h) and 150 °C (2184 h).
- The polymer structure remained stable up to 180 °C, confirmed by SAXS.
- A current density of 456 mA/cm² was achieved at 150 °C and 1.8 V during water electrolysis.
- Minor assembly issues were noted, but overall performance was promising.
Conclusions:
- CSPPSU membranes demonstrate significant potential as durable electrolyte membranes for elevated-temperature water electrolysis.
- The non-fluorinated nature and high-temperature stability make CSPPSU a viable alternative to conventional membranes.
- Further optimization of membrane assembly is recommended for commercial application.
Related Concept Videos
01:15Potentiometry: Membrane Electrodes
866
Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at...
866
01:17Ion Exchange
697
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
697