Wells St. John P.S.
Systems and methods of decoupled hydrogen generation using energy-bearing redox pairs
Described herein are systems and methods of hydrogen generation and electrolyte regeneration as independent operations in separate redox flow cells. The operations can be decoupled by using an energy-bearing redox pair that electrochemically bears energy facilitating flexible, efficient hydrogen generation. In one example, the hydrogen generation redox flow cell can include a liquid, energy-bearing electrolyte solution in which at least one species of an energy-bearing redox pair is dissolved, to decouple the hydrogen evolution reaction from the reaction at the opposite electrode (e.g., the oxygen evolution reaction of conventional direct water electrolysis). Each species of the energy-bearing redox pair is associated with a standard electrode potential within the water electrolysis window.
Battelle Memorial Institute
H Y Y H H C C
H01M Y02E Y02E H01M H01M C25B C25B
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Yuyan Qian Wei Dongping
Shao Huang Wang Lu