SILICON-BASED ELECTRODE FOR A LITHIUM-ION CELL

摘要

A silicon-based electrode includes a silicon layer on a substrate, an electrically conductive layer overlying a top surface of the silicon layer, an optional polymer layer overlying the top surface of the electrically conducting layer, and a plurality of channels extending through the electrically conductive layer and the silicon layer to the substrate. The channels define sidewalls in the silicon layer. The electrically conductive layer and the optional polymer layer act to inhibit lithium ion intercalation through the top surface of the silicon layer during charging of a lithium-ion cell, and the lithium ion intercalation into the silicon layer occurs through the sidewalls that are defined by the channels.

主权项

1. A silicon-based electrode for a lithium-ion cell, the electrode comprising:
a silicon layer on a substrate; an electrically conductive layer overlying a top surface of the silicon layer; and a plurality of channels extending through the electrically conductive layer and the silicon layer to the substrate, the channels defining sidewalls in the silicon layer; wherein the electrically conductive layer inhibits lithium ion intercalation through the top surface of the silicon layer during charging of a lithium-ion cell, the lithium ion intercalation into the silicon layer occurring through the sidewalls defined by the channels.