Patent ID: 11894553
Assignee: KABUSHIKI KAISHA TOSHIBA
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 1:
2. The electrode according to claim 1, wherein
when a cross section of the active material-containing layer along a stacking direction of the current collector and the active material-containing layer is observed by a scanning electron microscope, an average value of ratios (W/H) of bounding rectangles with respect to 200 niobium titanium composite oxide particles is in a range of 0.80 to 1.5,
the 200 niobium titanium composite oxide particles are selected at random from among niobium titanium composite oxide particles each having an area of 0.1 μm2 to 5 μm2 the cross section, and
with respect to each of the 200 niobium titanium composite oxide particles, the ratio (W/H) of the bounding rectangle of the niobium titanium composite oxide particle is determined, the bounding rectangle being defined by a maximum height (H) of the niobium titanium composite oxide particle along the stacking direction and a maximum width (W) of the niobium titanium composite oxide particle along an in-plane direction orthogonal to the stacking direction.