-Yolk-shell Si MANUFACTURING METHOD FOR SILICON NEGATIVE ELECTRODE MATERIAL HAVING A STRUCTURE OF YOLK-SHELL

摘要

The present invention comprises the steps of: a) forming a first polymer coating layer including polymethylmetacrylate on the surface of Si particles; b) forming a second polymer coating layer comprising a melanine polymer on the first polymer coating layer; And c) forming a void by removing the first polymer coating layer through heat treatment, and converting the second polymer coating layer to a carbon layer by carbonization; including a Yolk-shell structured Si anode It relates to a method of manufacturing ash.