The Li-S battery : an investigation of redox shuttle and self-discharge behaviour with LiNO3-containing electrolytes

• The polysulfide redox shuttle and self-discharge behaviour of lithium-sulfur (Li-S) cells containing the electrolyte additive LiNO3 has been thoroughly explored by a range of electrochemical and surface analysis techniques on simple Li-S (i.e., not specifically optimised to resist self-discharge) and symmetrical Li-Li cells. Despite the relatively effective passivation of the negative electrode by LiNO3, fully charged cells self-discharged a quarter of their capacity within 3 days, although in the short-term cells can be recharged without any noticeable capacity loss. The processes governing the rate and reversibility of self-discharge in these cells have been investigated and explained in terms of the reactions of polysulfides occurring at both electrodes during idle conditions.

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NATURVETENSKAP  -- Kemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences (hsv//eng)

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