US 12,087,984 B2
Hybrid redox fuel cell system
Yang Song, West Linn, OR (US); and Craig Evans, West Linn, OR (US)
Assigned to ESS TECH, INC., Wilsonville, OR (US)
Filed by ESS TECH, INC., Wilsonville, OR (US)
Filed on Sep. 2, 2022, as Appl. No. 17/929,627.
Claims priority of provisional application 63/261,408, filed on Sep. 20, 2021.
Prior Publication US 2023/0088434 A1, Mar. 23, 2023
Int. Cl. H01M 8/00 (2016.01); H01M 4/90 (2006.01); H01M 8/06 (2016.01); H01M 8/18 (2006.01)
CPC H01M 8/188 (2013.01) [H01M 4/9016 (2013.01); H01M 8/0693 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A hybrid redox fuel cell system, comprising:
a hybrid redox fuel cell including an anode side through which a reductant is flowed, and a cathode side through which a liquid electrolyte is flowed; and
an electrochemical cell, wherein an anode side of the electrochemical cell is fluidly coupled to the cathode side of the hybrid redox fuel cell,
wherein,
the liquid electrolyte includes a metal ion at a higher oxidation state and the metal ion at a lower oxidation state,
at the hybrid redox fuel cell, power is generated by reducing the metal ion at the higher oxidation state to the lower oxidation state at the cathode side while oxidizing the reductant at the anode side, and
at the anode side of the electrochemical cell, the metal ion at the lower oxidation state is oxidized to the higher oxidation state while the power is generated at the hybrid redox fuel cell.