Composite Membrane for Sodium Polysulfide Hybrid Redox Flow Batteries
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Non-aqueous redox flow batteries (NARFBs) using earth-abundant materials, such as sodium and sulfur, are promising long-duration energy storage technologies. NARFBs utilize organic solvents, which enable higher operating voltages and potentially higher energy densities compared with their aqueous counterparts. Despite exciting progress throughout the past decade, the lack of low-cost membranes with adequate ionic conductivity and selectivity remains as one of the major bottlenecks of NARFBs. Here, we developed a composite membrane composed of a thin (<25 µm) Na+-Nafion coating on a porous polypropylene scaffold. The composite membrane significantly improves the electrochemical stability of Na+-Nafion against sodium metal, exhibiting stable Na symmetric cell performance for over 2300 h, while Na+-Nafion shorted by 445 h. Additionally, the composite membrane demonstrates a higher room temperature storage modulus than the porous polypropylene scaffold and Na+-Nafion separately while maintaining high Na+ conductivity (0.24 mS/cm at 20 °C). Our method shows that a composite membrane utilizing Na+-Nafion is a promising approach for sodium-based hybrid redox flow batteries.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Electricity (OE)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 2000369
- Journal Information:
- Membranes, Journal Name: Membranes Journal Issue: 8 Vol. 13; ISSN 2077-0375
- Publisher:
- MDPICopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Nafion Inhibits Polysulfide Crossover in Hybrid Nonaqueous Redox Flow Batteries
Membrane design for non-aqueous redox flow batteries: Current status and path forward
Optimizing Nonaqueous Sodium–Polysulfide Redox-Flow Batteries: The Role of Solvation Effects with Glyme Solvents
Journal Article
·
Mon Dec 12 19:00:00 EST 2022
· Journal of Physical Chemistry. C
·
OSTI ID:1991688
Membrane design for non-aqueous redox flow batteries: Current status and path forward
Journal Article
·
Thu Apr 28 20:00:00 EDT 2022
· Chem
·
OSTI ID:1870254
Optimizing Nonaqueous Sodium–Polysulfide Redox-Flow Batteries: The Role of Solvation Effects with Glyme Solvents
Journal Article
·
Thu Nov 07 19:00:00 EST 2024
· ACS Energy Letters
·
OSTI ID:2573517