Electrode, secondary battery, battery pack and vehicle

An electrode comprising:

• a current collector;
• and
• an active material-containing layer which is formed on a surface of the current collector and comprises a plurality of niobium titanium composite oxide particles,
• wherein a X-ray diffraction pattern using a Cu-Kα ray source with respect to a surface of the active material-containing layer comprises a peak A with a highest intensity in a range of 2θ=26°±0.2° and a peak B with a highest intensity in a range of 2θ=23.9°±0.2°,
• wherein an intensity ratio (Ia/Ib) between an intensity Ia of the peak A and an intensity Ib of the peak B is in a range of 1.80 or more to 2.60 or less, and
• wherein the plurality of the niobium titanium composite oxide particles have a major axis oriented towards an in-plane direction of the current collector.