ELECTRODE COMPOSITION, ELECTROCHEMICAL CELL AND METHOD OF MAKING ELECTROCHEMICAL CELLS

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. 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 batteries containing such electrochemical cells and methods of making electrochemical cells using the electrode composition.

主权项

1. An electrode composition comprising:
a silicon alloy capable of undergoing lithiation and delithiation and having formula SixFeyCz, where x, y and z represent atomic percent values and a) x>2y+z, and b) x, y and z are each greater than 0; graphitic carbon, a binder, and a conductive additive comprising carbon nanotubes.