| 摘要 |
An electrode composition is disclosed that includes a silicon alloy containing silicon, iron and optionally carbon. The silicon alloy is capable of undergoing lithiation and delithiation. The electrode composition also includes graphitic carbon, a binder, and a conductive additive containing carbon nanotubes, wherein the composition comprises at least 0,1 % active lithium of the charge capacity of the composition prior to incorporation into an electrochemical cell. This active lithium is introduced via charging the electrode followed by an incomplete discharging step. Such an electrode composition may be used in a negative electrode for an electrochemical cell that also contains a positive electrode and an electrolyte. Also disclosed are battery backs containing such electrochemical cells and methods of making an electrode composition as well as methods of making electrochemical cells using the electrode composition. |
