| 摘要 |
PROBLEM TO BE SOLVED: To provide a power storage device having high cycle characteristics, even if a lithium metal fluoride phosphate compound where fluorine is deficient is used as a positive electrode active material, while reducing the internal resistance.SOLUTION: A power storage device includes a positive electrode containing a lithium metal fluoride phosphate compound where fluorine is partially deficient from stoichiometric composition as a positive electrode active material, and an electrolyte to which an organic compound containing fluorine in a molecule is added. Since an organic compound containing fluorine in a molecule is added into the electrolyte, deficiency of fluorine is made up even if a positive electrode active material having a large deficiency amount of fluorine in a crystal structure is used, and high cycle characteristics and reduced internal resistance equivalent to those of a positive electrode active material having a small deficiency amount of fluorine can be exhibited. |
