Abstract: The invention relates to a lithium storage battery comprising at least one electrochemical cell arranged in a tightly sealed packaging. The electrochemical cell is formed by a stack comprising a separator arranged between first and second electrodes. The separator is impregnated by an ionic liquid electrolyte comprising a mixture of a lithium salt, vinyl ethylene carbonate and an ionic liquid of formula C+A? in which C+ represents a cation and A? represents an anion. The first electrode comprises an electrochemically active material and a polymer-based binder chosen from polyacrylic acid (PAA) and sulfonated perfluoropolymers.

Abstract: The invention relates to an electrode for a lithium battery that contains LiFePO4 as electrochemically active material and a binder consisting of polyacrylic acid. The polyacrylic acid has a mean molecular weight greater than or equal to 1,250,000 g·mol?1 and strictly less than 2,000,000 g·mol?1. The percentage of LiFePO4 is greater than 90% by weight and the percentage of polyacrylic acid is less than or equal to 4%, said percentages being calculated with respect to the total weight of the electrode. The invention further relates to a lithium storage battery having a power or energy operating mode that contains the electrode for a lithium battery.

Abstract: The invention concerns a new flexible or rigid packaging for an electrochemical accumulator (A). It is made from at least one polyaryletherketone (PAEK) sheet, notably a polyetheretherketone (PEEK™) sheet. According to a preferred embodiment, a polyaryletherketone (PAEK) sheet (6.1, 6.2, 6.3, 61) incorporates within it at least one metal stud (40, 50) constituting one of the poles of the accumulator. The main application sought is the packaging of lithium-ion accumulators.