South 8 Technologies, Inc.

Miguel Ceja

Cyrus Sam Rustomji

Jungwoo Lee

James Royer

A safe electrolyte comprising a liquefied gas solvent that will transition from a liquid state to a gas state ('gas off') at a pressure of 100 kPa and at a temperature of 293.15 K is disclosed. The electrolyte is a mixture of a compressed gas solvent and a salt, and includes a hydrocarbon solvent of a sufficient concentration to promote solubility of the salt into the compressed gas solvent without phase separation. The molar ratio of the hydrocarbon solvent to the compressed gas solvent is in a range of 10:90 to 90:10. The hydrocarbon solvent may be selected to lower the global warming potential (GWP) of the electrolyte by at least 10%. This safe electrolyte can be used to manufacture an electrochemical energy storage device.

Chemically inert additives for electrochemical cells

A safe electrolyte comprising a liquefied gas solvent that will transition from a liquid state to a gas state ('gas off') at a pressure of 100 kPa and a temperature of 293.15 K is disclosed. A first mixture is formed from a first electrolyte component (one or more solvents) mixed with a second electrolyte component (one or more hydrocarbon co-solvents). The addition of the second electrolyte component (1) lowers the vapor pressure of the first mixture by at least 10% as compared to the vapor pressure of the first electrolyte component alone, when measured at 293.15 K, and (2) results in a vapor pressure of the first mixture above 100 kPa at a temperature of 293.15 K. The second electrolyte component may also be selected to lower the global warming potential (GWP) of the first mixture by at least 10% as compared to the GWP of the first electrolyte component alone. The safe liquefied gas electrolyte is formed by mixing a third electrolyte component (one or more salts) to the first mixture. This safe liquefied gas electrolyte can then be used to manufacture an electrochemical energy storage device.

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Manteca, CA, United States of America

Miguel Ceja