A lithium battery excellent in initial capacity, high rate discharge performance, low temperature performance and cycle life performance can be provided without the necessity of any special production step. In other words, the present invention lies in a l...

In a polymer electrolyte having a structure in which an organic electrolyte is held in an organic polymer, the polymer electrolyte has following structures (i) through (iii). (i) A skeleton of the organic polymer has a crosslink structure. (ii) The organic...