Patent ID: 9553304
Date: 2017-01-24
CPC Classifications: C22C,H01M,Y02E,Y10T

Claim:
1. An electroactive material comprising silicon structures, wherein the silicon structures have been at least partially isolated from a solidified aluminum-based metal-silicon alloy comprising less than 30 wt % silicon, the solidified aluminum-based metal-silicon alloy comprising an aluminum-based metal and the silicon structures dispersed therein, the silicon structures having been at least partially isolated from the aluminum-based metal of the alloy by selective etching of the aluminum-based metal of the alloy, and the silicon structures comprise silicon-comprising structural elements, wherein 30 to 100% of the structural elements are high-aspect ratio structural elements having a minor dimension of less than 2 μm and a length of greater than 5 times the minor dimension.