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Electrochemical energy storage device based on carbon dioxide as electroactive species

United States Patent

March 5, 2013
View the Complete Patent at the US Patent & Trademark Office
U.S. Department of Energy - Visit the Office of the Assistant General Counsel for Technology Transfer & Intellectual Property Website
An electrochemical energy storage device comprising a primary positive electrode, a negative electrode, and one or more ionic conductors. The ionic conductors ionically connect the primary positive electrode with the negative electrode. The primary positive electrode comprises carbon dioxide (CO.sub.2) and a means for electrochemically reducing the CO.sub.2. This means for electrochemically reducing the CO.sub.2 comprises a conductive primary current collector, contacting the CO.sub.2, whereby the CO.sub.2 is reduced upon the primary current collector during discharge. The primary current collector comprises a material to which CO.sub.2 and the ionic conductors are essentially non-corrosive. The electrochemical energy storage device uses CO.sub.2 as an electroactive species in that the CO.sub.2 is electrochemically reduced during discharge to enable the release of electrical energy from the device.
Nemeth; Karoly (Darien, IL), van Veenendaal; Michel Antonius (Naperville, IL), Srajer; George (Oak Park, IL)
U.S. Department of Energy (Washington, DC)
12/ 879,272
September 10, 2010
GOVERNMENT INTERESTS The United States Government has rights in this invention pursuant to Contract No. DE-AC02-06CH11357, between the U.S. Department of Energy (DOE) and UChicago Argonne LLC.