Abstract: A process for preparing a solid electrolyte or a composite electrode incorporating a solid electrolyte, configured for an electrochemical system, may involve: (i) synthesizing, in a solvent medium, at least one (co)polymer by ring-opening (co)polymerization (ROP) of at least one 5-8-membered cyclic carbonate and, optionally, of at least one 5-8-membered lactone, catalyzed by Brønsted superacid(s) and initiated by compound(s) comprising hydroxide group(s); (ii) adding to the reaction medium a sufficient amount of an alkali metal or alkaline earth metal hydride, e.g., LiH, to neutralize all the catalyst and obtain an alkali metal or alkaline earth metal salt and to protect the terminal hydroxyl group(s) of the (co)polymer(s); (iii) optionally adding to the mixture from (ii) salt(s) of the alkali metal or alkaline earth metal, e.g., a lithium salt; and (iv) forming a solid electrolyte by evaporation of the solvent medium or a composite electrode incorporating the solid electrolyte.

Abstract: A composite electrode with a solid electrolyte based on polycarbonates includes at least one solid electrolyte consisting of one or more (co)polymers obtained by ring-opening (co)polymerization (ROP) of at least one five- to eight-membered cyclic carbonate and, optionally, of at least one five- to eight-membered lactone, catalyzed with methanesulfonic acid or performed under microwave irradiation in the absence of catalyst. The hydroxyl functions at the end of the chain of the (co)polymer(s) may be protected. The electrode also includes at least one alkali metal or alkaline-earth metal salt and at least one electrode active material. The electrode may include one or more electrically conductive additives and/or one or more binders. The electrode may be used in an electrochemical system such as a lithium battery.

Abstract: A safety system for vehicle occupants includes a control unit and sensors situated remotely from the control unit and connected via conductors to the control unit. The safety system encompasses means for testing the sensors and the conductors to the sensors.

Abstract: A safety system for vehicle occupants includes a control unit and sensors situated remotely from the control unit and connected via conductors to the control unit. The safety system encompasses means for testing the sensors and the conductors to the sensors.