▎ 摘　　要

NOVELTY - An electrolyte comprises (a) a polymer, which is a polymerization or crosslinking product of a reactive additive, (b) a lithium salt, and (c) an organic liquid solvent or ionic liquid. The reactive additive comprises at least one reactive polymer, reactive oligomer, or reactive monomer and a curing agent or initiator. The reactive polymer, oligomer, or monomer comprises at least a reactive carboxylic and/or a hydroxyl group. USE - Electrolyte used in rechargeable lithium cell for rechargeable lithium battery (all claimed). Uses include but are not limited to electric vehicle, hybrid electric vehicle, lap-top computers, and mobile phones. ADVANTAGE - The non-flammable, safe and high-performing electrolyte improves high capacity and high energy density of the lithium secondary batteries. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) rechargeable lithium cell; (2) electrolyte composition, which comprises, (a) solution (S1), comprising a reactive additive and a non-aqueous liquid solvent (N1), and (b) a solution (S2), comprising an initiator or crosslinking agent, a lithium salt, and a non-aqueous liquid solvent (N2). The reactive additive comprises at least one reactive polymer, reactive oligomer, or reactive monomer comprising at least a reactive carboxylic and/or a hydroxyl group; (3) production of rechargeable lithium cell; and (4) rechargeable lithium battery, which comprises an anode, a cathode, and a quasi-solid or solid- state electrolyte in ionic communication with the anode and the cathode.