Restricting the Solubility of Polysulfides in Li-S Batteries Via Electrolyte Salt Selection

Lithium 2-trifluoromethyl-4,5-dicyanoimidazole as a supporting salt in electrolytes achieves a reduced Li2S8 solubility by tuning the chemical production to Li4S8 dimer. Ab initio molecular dynamics and nuclear magnetic resonance calculation confirms the solvation structure radius increase by 20%. Combined with Li2S8 and LiNO3, the electrolyte can demonstrate a stable 300 cycling battery of practical sulfur loading. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.