A low cost, high energy density, and long cycle life potassium-sulfur battery for grid-scale energy storage.

Lu, Xiaochuan; Bowden, Mark E; Sprenkle, Vincent L; Liu, Jun · Adv Mater · 2015

basic_science · Level V

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Abstract

A potassium-sulfur battery using K(+) -conducting beta-alumina as the electrolyte to separate a molten potassium metal anode and a sulfur cathode is presented. The results indicate that the battery can operate at as low as 150 °C with excellent performance. This study demonstrates a new type of high-performance metal-sulfur battery that is ideal for grid-scale energy-storage applications.