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|1. (WO2016058812) LITHIUM-SULPHUR ACCUMULATOR|
|Applicants:||BAYERISCHE MOTOREN WERKE AKTIENGESELLSCHAFT
The invention relates to a lithium-sulphur accumulator (1) comprising an electrolyte (2) containing lithium-ions, an anode (3) and a cathode (4) containing sulphur. Said claimed lithium-sulphur accumulator also comprises a surface layer (5) which is arranged between the anode (3) and the cathode (4). Said lithium-sulphur accumulator (1) also comprises areas on the cathode side which comprise polysulfides. Said surface layer (5) of the lithium-sulphur accumulator comprises at least one graphene layer which is permeable to lithium ions and non-permeable to polysulfides.