Abstract: A composite electrolyte can include a crosslinked polymer formed from telechelic precursor polymers having at least two photoactivatable end functional groups and a molecular weight before crosslinking of between about 1,000 and 1,000,000 Daltons (Da); and a lithium (Li) salt. Electrochemical cells and batteries including such electrolytes are also disclosed, along with various methods of manufacture.

Abstract: The invention provides fluoride ion host electrodes for use in electrochemical cells. These electrodes include carbon nanomaterials having a curved multilayered structure and a film or particles of a metal-based material. The metal-based material may react with fluorine and may be a transition metal such as silver. The invention also provides electrochemical cells in which the fluoride host electrode serves as at least one electrode of the cell.