Electric storage device and positive electrode

An electric storage device is provided with a positive electrode having a positive-electrode mixture layer including a positive-electrode active material. The positive-electrode active material includes a lithium-vanadium-phosphate from 8 % to 70 % by mass and a lithium-nickel complex oxide from 20 % to 82 % by mass. A coating concentration of the positive-electrode mixture layer is from 4 mg/cmto 20 mg/cm. The lithium-nickel complex oxide includes a nickel element from 0.3 mol to 0.8 mol with respect to a lithium element of 1 mol.