US 12,136,723 B2
Mist elimination system for electrochemical cells
Ramkumar Krishnan, Scottsdale, AZ (US); Joel Hayes, Chandler, AZ (US); Scott Klug, Mesa, AZ (US); Patrick Samuleson, Phoenix, AZ (US); and Craig Trzebny, Phoenix, AZ (US)
Assigned to FORM ENERGY, INC., Somerville, MA (US)
Filed by FORM ENERGY, INC., Somerville, MA (US)
Filed on Jan. 10, 2022, as Appl. No. 17/572,054.
Application 17/572,054 is a continuation of application No. 16/318,560, granted, now 11,228,066, previously published as PCT/US2017/043500, filed on Jul. 24, 2017.
Claims priority of provisional application 62/365,924, filed on Jul. 22, 2016.
Prior Publication US 2022/0131213 A1, Apr. 28, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 12/02 (2006.01); H01M 12/06 (2006.01); H01M 12/08 (2006.01); H01M 50/30 (2021.01); H01M 50/35 (2021.01); H01M 50/367 (2021.01); H01M 50/392 (2021.01)
CPC H01M 12/02 (2013.01) [H01M 12/06 (2013.01); H01M 12/08 (2013.01); H01M 50/35 (2021.01); H01M 50/367 (2021.01); H01M 50/392 (2021.01); H01M 50/394 (2021.01); Y02E 60/10 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An electrochemical cell comprising:
a cell housing comprising:
i) an air chamber;
ii) an air chamber air inlet;
iii) an air chamber air outlet;
iv) an electrolyte chamber,
an ionically conductive liquid electrolyte in the electrolyte chamber, wherein a gas space is defined in the electrolyte chamber above the liquid electrolyte, and wherein the gas space has a cell gas;
an oxidant reduction electrode for reducing a gaseous oxidant between the air chamber and the electrolyte chamber,
a fuel electrode comprising a metal fuel at least partially within the electrolyte chamber; and
a mist elimination system between the electrolyte chamber and an exhaust vent to separate the cell gas from a mist comprising the ionically conductive liquid electrolyte wherein the mist elimination system is above the ionically conductive liquid electrolyte, and wherein the mist elimination system comprises:
a spill prevention device;
a first mist elimination stack downstream of the spill prevention device, the first mist elimination stack comprising:
a hydrogen recombination portion comprising a hydrogen recombination catalyst configured to react with hydrogen gas within the cell gas and form water;
a filter body portion comprising at least one layer of filter media for capturing the mist, the at least one layer of filter media defining pores permeable by the cell gas; and
a neutralizer portion comprising a neutralizer media configured to react with and neutralize the ionically conductive liquid electrolyte contained within the mist;
wherein the neutralizer portion is downstream of the filter body portion.