| 主权项 |
1. An electrode comprising: a current collector; and an active material containing-layer that is formed on the current collector and comprises active material particles containing at least one selected from a niobium titanium composite oxide and a composite oxide expressed by a general formula of LixM11-yM2yTi6-zM3zO14+δ,
wherein the active material particles comprise primary particles having an average particle diameter within a range of 0.1 μm to 10 μm and secondary particles having an average particle diameter within a range of 1 μm to 30 μm, a pore diameter distribution of the active material containing-layer obtained by mercury porosimetry has a first peak, which has a maximum value within a range of 0.01 μm to 2 μm, and a second peak which has a maximum value within a range exceeding 6 μm and equal to or smaller than 20 μm, and an intensity of the second peak is 1/10 to ⅕ an intensity of the first peak, (wherein, in the formula, M1 is at least one kind which is selected from a group consisting of Sr, Ba, Ca, and Mg, M2 is at least one kind which is selected from a group consisting of Cs, K and Na, M3 is at least one kind which is selected from a group consisting of Al, Fe, Zr, Sn, V, Nb, Ta and Mo, and x is within a range of 2≦x≦6, y is within a range of 0<y<1, z is within a range of 0<z≦6, and δ is within a range of −0.5≦δ≦0.5). |
