Current collector, electrode, lithium ion battery and electric equipment

The utility model relates to a current collector, a pole piece and a lithium ion battery, at least one side surface of the current collector is provided with a plurality of lithium-loving parts, and the area ratio of the plurality of lithium-loving parts on at least one side surface of the current collector is 10-30%. According to the utility model, a lithium-loving part is formed on the current collector of the cathode-free battery to guide lithium ions to deposit on the current collector, so that the lithium-loving property of the current collector is improved, and the rate capability and the cycle performance of the battery are improved.