| 摘要 |
PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte electricity storage element capable of preventing a support salt from being deposited on an electrode surface, having high discharge capacity, and capable of improving weight energy density.SOLUTION: A nonaqueous electrolyte electricity storage element includes: a positive electrode including a positive electrode active material capable of inserting/desorbing anions; a negative electrode including a negative electrode active material capable of occluding/discharging at least one of metal lithium and lithium ions; a first separator between the positive electrode and the negative electrode; and a nonaqueous electrolyte obtained by dissolving a lithium salt in a nonaqueous solvent. The nonaqueous electrolyte electricity storage element contains a solid lithium salt at a temperature of 25°C and a discharge voltage of 4.0 V, and has an ion exchange membrane between the first separator and at least one of the positive electrode and the negative electrode. |
