An Outline of NAS Battery and Sulfidation Resistance of High Cr-Fe Alloy Coatings Formed by Plasma Spraying Process

Abstract

A sodium-sulfur battery (NAS battery) cell is comprised of a sodium negative electrode and a sulfur positive electrode separated by a solid electrolyte made of beta-alumina, housed within a cylindrical aluminum container. The container exposed sever corrosive agents, such as molten sulfur and sodium polysulfides, but have to be designed to deliver 4500 charge/discharge cycles over a 15-years operating life.
This paper described about the outline of high temperature type NAS battery, plasma sprayed high Cr-Fe alloy coatings and their corrosion resistance against the positive electrode environments used for long service NAS battery.