POWER STORAGE DEVICE

摘要

A power storage device includes a positive electrode including a positive electrode current collector and a positive electrode active material having an olivine structure which is represented by a structural formula LiFexMe1-xPO4 (Me = Mn, Ni, or Co) (x is greater than 0 and less than 1) over the positive electrode current collector, or a power storage device includes a positive electrode including a positive electrode current collector and a positive electrode active material, and a negative electrode which faces the positive electrode through an electrolyte, where discharging capacitance is greater than or equal to 150 mAh/g and energy density per unit weight is higher than or equal to 500 mWh/g.