Conversion of CO2 to CO by electrolysis of molten lithium carbonate

Valery Kaplan, Ellen Wachtel, Konstantin Gartsman, Yishay Feldman, Igor Lubomirsky

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123 Scopus citations


The conversion of CO2 to CO by electrolysis of molten Li 2 CO3 was investigated. Using a cell comprising a Ti cathode, a graphite anode and a source of CO2 allows the continuous electrolysis of the melt at 900°C with current densities at the electrodes higher than 100 mA/ cm2. The faradaic efficiency of the process is close to 100%, and the thermodynamic efficiency at 100 mA/ cm2 is >85%. The proposed method has several advantages: (i) No precious metal is required, (ii) no hazardous or toxic by-products are produced, and (iii) the method may operate continuously, producing pure CO rather than a mixture of CO and CO2. Therefore, the process described here has a potential application for converting electrical energy into fuel.

Original languageEnglish
Pages (from-to)B552-B556
JournalJournal of the Electrochemical Society
Issue number4
StatePublished - 2010
Externally publishedYes


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