Regenerative fuel cell with ph control

Details Regenerative fuel cell with ph control Regenerative fuel cell with ph control

H - Electricity

01

M

H01M 8/04 (2006.01) H01M 8/18 (2006.01)

Patent

CA 2444694

The present invention relates to a process for operating a regenerative fuel cell (RFC). The process involves circulating a first electrolyte (electrolyte 1) through the negative chamber of the cell and a second electrolyte (electrolyte 2) through the positive chamber of the cell. Electrolyte (1) contains sulfide during the discharge cycle of the cell. Electrolyte (2) contains bromine during the discharge cycle of the cell. Decreases in ph in the electrolyte are compensated by circulating a fraction of other electrolyte (1) or (2) through the positive chamber of an auxiliary cell. A fraction of electrolyte (2), which has been made free of bromine, is circulated in the negative chamber of the auxiliary cell.

L'invention concerne un procédé de manipulation d'une pile à combustible à récupération (RFC). Ce procédé consiste à recycler une première électrolyte (électrolyte numéro 1) par la chambre négative de la pile et une seconde électrolyte (électrolyte numéro 2) par la chambre positive de la pile. Cette électrolyte (1) contient du sulfure pendant le cycle de décharge de la pile. L'électrolyte (2) contient du brome au cours du cycle de décharge de la pile. La baisse du ph dans l'électrolyte est compensée par le recyclage d'une partie de l'autre électrolyte (1) ou (2) par la chambre positive d'une pile auxiliaire. Une partie de l'électrolyte (2) qui a été fabriquée sans brome est recyclée dans la chambre négative de la pile auxiliaire.

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