LITHIUM ION SECONDARY BATTERY

摘要

Provided is a lithium ion secondary battery in which there is little reactivity between a nonaqueous electrolyte and an electrode, there is reduced heat generation, and thermal runaway is not prone to occur. This lithium ion battery comprises: an electrode (the positive electrode and/or negative electrode) prepared using an electrode mixture comprising an active substance, a medium, a resin (A) soluble in the medium, and a resin which disperses or emulsifies in the medium; and a nonaqueous electrode which contains an electrolyte and a liquid composition. The electrolyte is a lithium salt, and the liquid composition contains a cyclic carboxylic acid ester compound and at least one fluorine-containing solvent (α) selected from a group consisting of a fluorine-containing ether compound, a fluorine-containing chain carboxylic acid ester compound, and a fluorine-containing chain carbonate compound.