Preparation of Ionic Membranes for Zinc/Bromine Storage Batteries
- Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Zinc/bromine flow batteries are being developed for vehicular and utility load leveling applications. During charge, an aqueous zinc bromide salt is electrolyzed to zinc metal and molecular bromine. During discharge, the zinc and bromine react to again form the zinc bromide salt. One serious disadvantage of the microporous separators presently used in the zinc/bromine battery is that modest amounts of bromine and negatively charged bromine moieties permeate through these materials and react with the zinc anode. This results in partial self-discharge of the battery and low coulombic efficiencies. Our approach to this problem is to impregnate the microporous separators with a soluble cationic polyelectrolyte. In laboratory screening tests a sulfonated polysulfide resin and fully fluorinated sulfonic acid polymer substantially reduced bromine permeation with only modest increases in the area resistance.
- Research Organization:
- Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Federal Energy Management Program Office
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5848259
- Report Number(s):
- SAND--90-3186C; CONF-910801--1; ON: DE91012008
- Country of Publication:
- United States
- Language:
- English
Similar Records
Membrane and durability studies for the zinc/bromine battery
Zinc-bromine battery development, Sandia Contract 48-8838
Related Subjects
250901 -- Energy Storage-- Batteries-- Design & Development
250903* -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
ELECTRIC BATTERIES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROCHEMICAL CELLS
MEMBRANES
METAL-NONMETAL BATTERIES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
ORGANIC SULFUR COMPOUNDS
PERFORMANCE
PETROCHEMICALS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
POLYMERS
RESINS
SULFONATES
ZINC-BROMINE BATTERIES