NOVELTY - The electrode (260) has a sulfur element containing and sequestering matrix, a conducting agent and a solid polymer electrolyte (230) that are mixed together to form an electrode active film (210), where the sulfur element is physically sequestered in the sequestering matrix. The sequestering matrix is made of poly-difluoroethene and electronically conductive materials. A current collector (240) is located adjacent to the active film, where the electrode contains no fluorinated polymers. The electrolyte comprises lithium salt and block copolymer e.g. diblock copolymer or triblock copolymer.    USE - Electrode i.e. cathode, for use in an electrochemical cell (all claimed) i.e. lithium sulfur electrochemical cell, of portable electronic devices e.g. cellular phones and laptop computers, electrical-grid load leveling devices and electrically-powered vehicles. Uses include but are not limited to defense applications, aerospace applications, back-up storage applications and transportation applications.    ADVANTAGE - The solid polymer electrolyte acts as a diffusion barrier for the sulfur element within the electrode and between the electrode and anode, thus preventing sulfur diffusion that leads to capacity fade that occurs in conventional liquid electrolyte based cell systems. The electrode allows the electrochemical cell to increase current collector utilization, trim down inactive weight and volume, cut down manufacturing cost of the electrode and provide long cycle life and high sulfur utilization. The electrode uses a very thin or reticulated metal current collector whose only function is electronic conduction, thus reducing unnecessary weight and volume in an electrode assembly. The electrode allows polymer domains to provide an additional functionality so as to improve mechanical strength, ionic conductivity and chemical or electrochemical stability and make material being easier to process, while providing stable solid electrolyte interface (SEI) layers, providing enhanced energy capabilities and minimizing loss of active material in the electrode.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for an electrochemical cell.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of an electrochemical cell including a positive electrode and a negative electrode.    Positive electrode assembly (200)    Electrochemical cell (202)    Electrode active film (210)    Positive electrode sulfur-containing active material particle (220)    Solid polymer electrolyte (230)    Current collector (240)    Electrode (260)