Abstract: A method for treating a surface of a strip or film, the strip or film being made of lithium or a lithium-based alloy, the method comprising a step of radiating at least one portion of the surface of the strip or film with a laser beam, the radiating step being carried out in a controlled atmosphere, the laser beam radiating the entire area of the at least one portion of the surface of the strip or film.

Abstract: A cross-linked copolymer is provided, including at least repeating units of poly(alkylene oxide) and at least repeating units of lithium polystyrene-sulfonyl(trifluoromethylsulfonyl)imide (PSTFSILi), as well as the use of such a cross-linked copolymer for preparing a solid polymer electrolyte, a solid polymer electrolyte having the cross-linked copolymer, and a battery, for example a lithium metal polymer (LMP) battery, including the solid polymer electrolyte.

Abstract: The invention relates to an improved solid polymer electrolyte SPE, in particular for storage batteries, and, even more particularly, for LMP storage batteries. The objective of the invention is to provide a SPE that has, at low temperatures (?40° C.), both high ionic conductivity and very good mechanical qualities in the solid state, which can limit or even eliminate the dendritic growth of metal in the storage battery, in this case lithium in LMP storage batteries. To this end, the invention first and foremost relates to a Solid Polymer Electrolyte (SPE) comprising: 1.