Abstract: An electrochemical cell of the lithium/sulfur type comprising: a) a cathode comprising: i) microporous carbon in the form of particles, the particle size distribution being characterized by a median volume diameter Dv50 of the particles which is greater than or equal to 1 ?m and less than or equal to 5 ?m; ii) sulfur having an oxidation degree in the range of 0 to ?2 in the pores of the microporous carbon; b) an electrolyte comprising a solvent, said solvent comprising at least one fluorinated carbonate; c) an anode composed of lithium metal or of a lithium metal alloy. The electrochemical cell exhibits an improved specific gravimetry and an improved life cycle.

Abstract: The present invention provides a magnesium anode and an electrochemical cell comprising the anode.

Abstract: An ionic liquid-based composition for protecting lithium metal anodes in a lithium-based electrochemical energy storage system, comprising a polymerizable ionic liquid (or ionic liquid monomer), the cation or the anion of which carries at least one polymerizable function, a non-polymerizable ionic liquid, an ionic liquid of the “crosslinker” type, the cation or the anion of which carries at least two polymerizable functions, and a lithium salt. This composition is then coated and polymerized onto a metallic lithium surface and serves as protection layer. The ionic liquid-based polymer composition coated as such on the lithium surface, even if it is swelling with liquid electrolyte, protects the lithium against a constant electrolyte consumption and formation of unstable solid-electrolyte interphase (SEI), which is continuously forming on a bare lithium surface. The growing of dendrites is retarded with such ionic liquid-based polymer composition protection.

Abstract: An electrochemical cell of the lithium/sulfur type comprising: a) a cathode comprising: i) microporous carbon in the form of particles, the particle size distribution being characterized by a median volume diameter Dv50 of the particles which is greater than or equal to 1 ?m and less than or equal to 5 ?m; ii) sulfur having an oxidation degree in the range of 0 to ?2 in the pores of the microporous carbon; b) an electrolyte comprising a solvent, said solvent comprising at least one fluorinated carbonate; c) an anode composed of lithium metal or of a lithium metal alloy. The electrochemical cell exhibits an improved specific gravimetry and an improved life cycle.