Patent ID: 9518335
Filing Date: 2016-12-13
CPC Classification: C23F,C25F

Claim Text:
1. A method of manufacture of an electrode having a porous metallic material and a coating of varying thickness on the porous material, comprising sequential steps of: i) providing, by way of melting, a structure made of an alloy system with at least a first metal component of Cu or Zn and a second metal component selected from the group consisting of Au, Ag, Pt and Cu, wherein the first metal component is more reactive than the second metal component; ii) subjecting the structure to Surface Mechanical Attrition Treatment (SMAT) for duration varying from 30 seconds to 12 minutes, forming a first SMAT-treated structure; iii) selectively etching away the more reactive first metal component in the SMAT-treated structure by immersion in an electrolyte of hydrochloric acid with or without a voltage field applied, thus forming a first etched away or fabricated porous structure of Au, Ag, Pt or Cu; and iv) electrochemically depositing electroactive material onto the fabricated porous Au, Ag, Pt or Cu with varied deposition amount.