Li-Se battery: absence of lithium polyselenides in carbonate based electrolyte.
The lithiation mechanism of the Li-Se cell in a carbonate-based electrolyte is discussed. It is found that Se is directly reduced to Li2Se in discharge without intermediate phases detected by in situ X-ray diffraction or X-ray absorption spectroscopy. The reason is that the redox products Se and Li2Se, as well as lithium polyselenides are insoluble in the electrolyte.
Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois, USA. abouimrane@anl.gov.
Yanjie
Y
Cui
Ali
A
Abouimrane
Cheng-Jun
CJ
Sun
Yang
Y
Ren
Khalil
K
Amine