Pole piece, roll core and battery

The invention provides a pole piece, a roll core and a battery, the pole piece comprises a current collector and an active substance layer, the active substance layer comprises a first coating and a second coating, and the first coating and the second coating are respectively arranged on two opposite sides of the current collector; the first coating comprises a first concave part, the second coating comprises a second concave part, and the first concave part and the second concave part are arranged in a staggered manner. The pole piece disclosed by the invention has good quick-charge and quick-discharge performance. 本发明提供一种极片、卷芯及电池，极片包括集流体和活性物质层，所述活性物质层包括第一涂层和第二涂层，所述第一涂层和第二涂层分别设置在集流体相背的两侧；所述第一涂层中包括第一凹部，所述第二涂层中包括第二凹部，所述第一凹部和所述第二凹部呈错位排布。本发明的极片具有良好的快充快放性能。