Science Daily May 15, 2024
To investigate the deactivation and reactivation mechanisms of the aqueous Na–CO2 battery during extended cycling, researchers at Oak Ridge National Laboratory designed the cathode to include non-precious intermetallic catalysts. As the cell underwent repeated cycles, the voltage polarization during discharge progressively rose, eventually led to the cell’s deactivation and formation of decomposition products clogging the electrode surface. Results obtained from comprehensive characterization techniques provided insight into the decomposition products. They showed an electrochemical approach for regeneration of the aqueous cells. According to the researchers their findings provide a path toward creating long-duration systems with self-healing properties… read more. TECHNICAL ARTICLE
… two electrodes in a saltwater solution, pulls atmospheric carbon dioxide into its electrochemical reaction and releases only valuable byproducts. Credit: Andy Sproles/ORNL, U.S. Dept. of Energy