Lithium-ion accumulator

Abstract

A lithium-ion accumulator successively includes a first current collector; a negative electrode in contact with the first current collector; an electrode separator comprising an electrolyte, in contact with the negative electrode; a positive electrode in contact with the electrode separator; and a second current collector in contact with the positive electrode. The second current collector is made of aluminum covalently grafted with at least one phenyl aromatic group C6(Ri)5, in which formula: Ri designates R1, R2, R3, R4 and R5 which are independently from one another selected from the group including: C(═O)O—Y+; SO3−Y+; CH2—SO3−Y+; NR3+X−; OH; PO3H−Y+; H; F; CnF2n+1; CnH2n+1; NO2; —O—CH2—O—; imidazole groups; and derivatives of imidazole groups; with Y═H, Na, K, Li, NR′4; X═F, Cl, Br, I; n being an integer in the range from 1 to 10; R═CmH2m+1; R′═H, CmH2m+1 and mixtures thereof, m being an integer in the range from 1 to 10; at least two groups Ri being different from H.

Dependencies are inferred from the claim text.