NONAQUEOUS ELECTROLYTE SECONDARY CELL

摘要

A nonaqueous electrolyte secondary cell which comprises, for example, a positive electrode (6), a negative electrode (5), a polymer film (1) containing carbon particles or the like and a diaphragm layer (7). Carbon particles, silicon particles, tin particles or aluminum particles (2) contained in the polymer film (1) absorb lithium particles (3) and dendrites (4) as an intercalated material of lithium. The intercalated material of lithium has a lower reactivity than that of lithium particles (3) or dendrites (4), which results in the improvement of safety of the cell and the suppression of short circuit between positive and negative electrodes due to the presence of dendrites, leading to the significant improvement of life characteristics with respect to charge-discharge cycle.