Silicon-based anode and method for manufacturing the same

摘要

A silicon-based anode comprising silicon, a carbon coating that coats the surface of the silicon, a polyvinyl acid that binds to at least a portion of the silicon, and vinylene carbonate that seals the interface between the silicon and the polyvinyl acid. Because of its properties, polyvinyl acid binders offer improved anode stability, tunable properties, and many other attractive attributes for silicon-based anodes, which enable the anode to withstand silicon cycles of expansion and contraction during charging and discharging.

主权项

1. A silicon-based anode, comprising:
substantially elemental silicon particles suspended in a matrix; polyvinyl acid bound to at least a portion of the silicon particles to create an interface between the polyvinyl acid and silicon particles; and vinylene carbonate confined within and dispersed throughout the anode in contact with and covering a boundary between the polyvinyl acid and silicon particles.