Patent ID: 10985365

Abstract:
Provided is a rechargeable alkali metal-sulfur cell comprising: (a) an anode; (b) a cathode active material layer comprising a sulfur-containing material; and (c) an electrolyte or an electrolyte/separator layer; wherein the anode comprises (i) an anode active material layer; (ii) a first anode-protecting layer, in physical contact with the anode active material layer, having a thickness from 1 nm to 100 μm and comprising a thin layer of an electron-conducting material having a specific surface area greater than 50 m2/g; and (iii) a second anode-protecting layer in physical contact with the first anode-protecting layer, having a thickness from 1 nm to 100 μm and comprising an elastomer having a fully recoverable tensile elastic strain from 2% to 1,000% and a lithium ion conductivity from 10−8 S/cm to 5×10−2 S/cm when measure at room temperature.