NEGATIVE ELECTRODE CURRENT COLLECTOR, NEGATIVE ELECTRODE PLATE, ELECTROCHEMICAL DEVICE, AND DEVICE

The present application discloses a negative electrode current collector (10), a negative electrode plate (30), an electrochemical device, and an apparatus. The negative electrode current collector (10) includes a polymer material-based support layer (101) and a copper-based conductive layer (102) disposed on at least one surface of the support layer (101); wherein a thickness D1 of the copper-based conductive layer (102), a tensile strength T of the support layer (101), and a thickness D2 of the support layer (101) satisfy a relational formula 0.01 ≤ (300 × Di)/(T × D2) ≤ 0.5. The negative electrode current collector (10) has relatively high mechanics and mechanical properties, good electrical conductivity and current collection performance and low weight, which can improve preparation yield of the negative electrode current collector (10), the negative electrode plate (30) and the electrochemical device and their reliability during use, and is beneficial to enabling the electrochemical device to have relatively high electrochemical performance and gravimetric energy density.