SULFUR PARTICLES COATED WITH INORGANIC-ORGANIC HYBRID MEMBRANES AS CATHODE ACTIVE MATERIAL AND BATTERIES CONTAINING THE PARTICLES

摘要

PROBLEM TO BE SOLVED: To provide an elemental sulfur composite material which is preferable for use as a cathode active material, enables the achievement of a high sulfur loading and is stabilized to polysulfide loss.SOLUTION: A core-shell composite sulfur particle comprises: a core of elemental sulfur including homogeneously dispersed particles of a conductive carbon and a polyelectrolyte polymer; and a shell of a hybrid membrane containing, in sequence from a surface of the core, a layer of branched polyethyleneimine (bPEI), a layer of a negatively charged clay nanosheet and a further coating of bPEI, and the shell encapsulating the core. In the core-shell composite sulfur particle, the conductive carbon dispersed particles are associated with the polyelectrolyte polymer.SELECTED DRAWING: None