TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Component: The battery further comprises a porous separator.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Materials: The phosphazene core comprises 3-10 phosphorus-nitrogen repeat units, wherein the phosphorus of each repeat unit is bound by a double bond to its respective nitrogen. Each repeat unit is bound to adjacent repeat units by single bonds. The liquid phosphazene is combined, in any molar ratio, with non-phosphazene battery solvents, preferably organic carbonates including ethylene carbonate, diethylene carbonate or propylene carbonate. The battery electrolyte solution comprises no ion-transport liquid additive except the phosphazene. It comprises no ethylene carbonate.    TECHNOLOGY FOCUS - POLYMERS - Preferred Materials: The ligands comprise polythioethers or polymers containing Group 6B elements of the Periodic Table. The polymer is a solid polymer electrolyte. It comprises a composite of an ion-transporting polymer and an inorganic ion carrier. The polymer itself does not function as an electrolyte but functions as a host for an electrolyte solution. EXAMPLE - A mixture of 2-(2-methoxyethoxy)ethanethiol (MEET) (37.2 g) and anhydrous 1,4-dioxane (400 mL) was added with sodium hydride (7.3 g) under a nitrogen gas purge for an additional 30 minutes to prepare a thiolate solution. A polydichlorophosphazene/toluene solution was added slowly (over 30 minutes) to the stirring thiolate solution under nitrogen gas purge. After the addition was completed, the reaction mixture was heated to 70degreesC and stirred under nitrogen for an additional 7 hours. The reaction was allowed to cool to room temperature and then quenched by precipitating the polymer in hexane (1.5 L), followed by dissolving and neutralizing the crude poly(bis(2-2-methoxyethoxy)ethanethio)phosphazene) (MEET-P) in nanopure water (250 mL) at 5degreesC. The crude MET-P/water solution was worked up to yield purified MEET-P (1.1 g, 4% yield).