| abstract |
The present invention provides a negative electrode active material for a power storage device that has a low operating potential, can increase the operating voltage of the power storage device, and is excellent in cycle characteristics. TiO 2 1 to 95%, P 2 O 5 + SiO 2 + B 2 O 3 + Al 2 O 3 + R′O (R ′ is at least selected from Mg, Ca, Sr, Ba and Zn) 1 type) The negative electrode active material for electrical storage devices characterized by containing 5-75% and containing 10 mass% or more of amorphous phases. |