Method of fabricating fibres composed of silicon or a silicon-based material and their use in lithium rechargeable batteries

摘要

An electrically interconnected mass includes elongated structures. The elongated structures are electrochemically active and at least some of the elongated structures cross over each other to provide intersections and a porous structure. The elongated structures include doped silicon.

主权项

1. A method of forming a porous structure for a lithium-ion battery electrode, wherein the porous structure comprises a plurality of silicon-comprising elongated elements, the elongated elements being capable of lithium insertion and removal, the method comprising:
arranging a plurality of silicon-comprising elongated elements, wherein at least some of the elongated elements cross over other elongated elements many times along their length to provide multiple intersections thereby defining the porous structure; and charging the porous structure, wherein the charging welds the elongated elements to one another at the intersections by forming amorphous silicon-containing structures between disrupted crystalline structures of the silicon-comprising elongated elements at the intersections.