Lithium secondary battery having an improved polymer electrolyte

A lithium secondary battery comprising:

• a positive electrode comprising a positive active material capable of intercalating and deintercalating lithium ions;
• a negative electrode including a negative active material capable of intercalating and deintercalating lithium ions;
• and
• a polymer electrolyte including a polymer, a non-aqueous organic solvent, and a lithium salt, the polymer electrolyte having a shear strength relative to the positive electrode of about 0.7 N/mm or greater and a peel strength relative to the positive electrode of about 0.002 N/mm or greater, the polymer comprising:
• a first monomer represented by a polyesterpolyol of Formula 1:
• A-polyesterpolyol-B (1)
• wherein the polyesterpolyol is produced by condensation of at least one alcohol derivative having from 2 to 6 OH groups and at least one dicarboxylic acid derivative, the polyesterpolyol having a weight average molecular weight ranging from about 100 to about 10,000,000, and each of A and B are linked to terminal OH groups of the polyesterpolyol, each of A and B being selected from the group consisting of CH2═CR—C(═O)—, CH2═CR—C—CH2—, CH2═CR—, CH2═CR—O—C(═O)—, CH2═CH—CH2—O—, CH2═CH—S(═O)2—, or CH2═CR—C(═)—O—CH2CH2—NH—C(═O)—, wherein R is selected from the group consisting of C1 to C10 hydrocarbons and C6 to C10 aromatic hydrocarbons;
• and
• a second monomer selected from the group consisting of ethylene glycol methylether acrylate, Formulas 2 through 7, and combinations thereof:
• CH2═CR1-C(═O)—O—X (2)
• CH2═CR1-O—X (3)
• CH2═CR1-O—C(═O)—X (4)
• CH2═CH—CH2—O—X (5)
• CH2═CH—S(═O)2—X (6)
• CH2═CR1-C(═O)—O—CH2NH—C(═O)—O—X (7)
• wherein R1 is selected from the group consisting of H, C1 to C10 hydrocarbons and C1 to C10 aromatic hydrocarbons, and X is selected from the group consisting of C1 to C20 hydrocarbons, C1 to 020 halogenated hydrocarbons, C1 to C10 aromatic hydrocarbons and C1 to C10 halogenated aromatic hydrocarbons.

A lithium secondary battery comprising:

• a positive electrode comprising a positive active material capable of intercalating and deintercalating lithium ions;
• a negative electrode comprising a negative active material capable of intercalating and deintercalating lithium ions;
• and
• a polymer electrolyte comprising a polymer, a non-aqueous organic solvent, and a lithium salt, the polymer comprising:
• a first monomer represented by a polyesterpolyol of Formula 1:
• A-polyesterpolyol-B (1)
• wherein the polyesterpolyol is produced by condensation of at least one alcohol derivative having from 2 to 6 OH groups and at least one dicarboxylic acid derivative, the polyesterpolyol having a weight average molecular weight ranging from about 100 to about 10,000,000, and each of A and B are linked to terminal OH groups of the polyesterpolyol, each of A and B being selected from the group consisting of CH2═CR—C(═O)—, CH2═CR—C—CH2—, CH2═CR—, CH2═CR—O—C(O)—, CH2═CH—CH2—O—, CH2CH—S(O)2—, or CH2═CR—C(═O)—O—CH2CH2—NH—C(═O)—, wherein R is selected from the group consisting of Cj to C10 hydrocarbons and C6 to C10 aromatic hydrocarbons;
• and
• a second monomer selected from the group consisting ethylene glycol methylether acrylate, Formulas 2 through 7, and combinations thereof:
• CH2═CR1-C(═O)—O—X (2)
• CH2═CR1-O—X (3)
• CH2═CR1-O—C(═O)—X (4)
• CH2═CH—CH2—O—X (5)
• CH2═CH—S(═O)2—X (6)
• CH2═CR1-C(═O)—O—CH2CH2—NH—C(═O)—O—X (7)
• wherein R1 is selected from the group consisting of H, C1 to C10 hydrocarbons and C1 to C10 aromatic hydrocarbons, and X is selected from the group consisting of C1 to C20 hydrocarbons, C1 to C20 halogenated hydrocarbons, C1 to C20 aromatic hydrocarbons and C1 to C20 halogenated aromatic hydrocarbons.