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US 2020/0052319 A1Published application
Cost-efficient high energy density redox flow battery
AssigneeEss Tech, Inc.
InventorsYang Song, Craig E. Evans
Life of this patent
Estimating the term…
Abstract
Methods and systems are provided for a redox flow battery system. In one example, the redox flow battery is adapted with an additive included in a battery electrolyte and an anion exchange membrane separator dividing positive electrolyte from negative electrolyte. An overall system cost of the battery system may be reduced while a storage capacity, energy density and performance may be increased.
Claims20
A redox flow battery system, comprising:
- a battery cell with a positive electrolyte and a negative electrolyte, the positive electrolyte in contact with a positive electrode and the negative electrolyte in contact with a negative electrode;
- and
- a membrane separator arranged between the negative electrolyte and positive electrolyte, the membrane separator formed from an anion exchange membrane (AEM) configured to maintain a charge balance of the battery cell and increase an energy density of the redox flow battery system.
A method for a redox flow battery system comprising;
- plating a metal from an electrolyte solution onto a negative electrode during charging of the redox flow battery system;
- deplating the metal from the negative electrode into the electrolyte solution during discharging of the redox flow battery system;
- and
- transporting anions across an anion exchange membrane separator positioned in the electrolyte solution, the anion exchange membrane separator configured to separate a negative electrode compartment from a positive electrode compartment of the redox flow battery system.
1 more element
An iron redox flow battery comprising;
- an electrolyte formed from iron chloride complexes in aqueous solution in contact with a positive electrode and a negative electrode;
- and
- an anion exchange membrane separator positioned between the positive electrode and negative electrode and in contact with the electrolyte, the anion exchange membrane separator configured to selectively interact with chloride anions from the iron chloride complexes.
Dependencies are inferred from the claim text.