Aqueous polysulfide-based electrochemical cell

An electrochemical cell comprising:

• a catholyte comprising a cathode active material dissolved in an electrolyte;
• an anolyte comprising a polysulfide compound dissolved in the electrolyte;
• and
• a separator electrically insulating the anolyte from the catholyte, the anolyte and the catholyte in ionic communication with one another via the separator, and the cathode active material comprising a manganese-based compound.

An electrochemical cell comprising:

• a catholyte comprising a cathode active material dissolved in an electrolyte;
• an anolyte comprising a polysulfide compound dissolved in the electrolyte;
• and
• a separator electrically insulating the anolyte from the catholyte, the anolyte and the catholyte in ionic communication with one another via the separator, and at least one of the catholyte or the anolyte comprising sodium thiosulfate (Na2S2O3).

An electrochemical cell comprising:

• a catholyte comprising a cathode active material dissolved in an electrolyte;
• an anolyte comprising a polysulfide compound dissolved in the electrolyte;
• and
• a separator electrically insulating the anolyte from the catholyte, the anolyte and the catholyte in ionic communication with one another via the separator, and the cathode active material of the catholyte comprising a transition metal sulfide.