Lithium Iodide as a Promising Electrolyte Additive for Lithium-Sulfur Batteries: Mechanisms of Performance Enhancement

Lithium Iodide (LiI) is reported as a promising electrolyte additive for lithium–sulfur batteries. It induces formation of Li‐ion‐permeable protective coatings on both positive and negative electrodes, which prevent the dissolution of polysulfides on the cathode and reduction of polysulfides on the...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2015-01, Vol.27 (1), p.101-108
Main Authors: Wu, Feixiang, Lee, Jung Tae, Nitta, Naoki, Kim, Hyea, Borodin, Oleg, Yushin, Gleb
Format: Article
Language:English
Subjects:
Additives
cathode
Electrolytes
Electrolytic cells
Iodides
Li/S
Lithium
lithium iodide
lithium sulfide
Lithium sulfur batteries
Polysulfides
Reduction (electrolytic)
sulfur
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Summary:Lithium Iodide (LiI) is reported as a promising electrolyte additive for lithium–sulfur batteries. It induces formation of Li‐ion‐permeable protective coatings on both positive and negative electrodes, which prevent the dissolution of polysulfides on the cathode and reduction of polysulfides on the anode. In addition to enhancing the cell cycle stability, LiI addition also decreases the cell overpotential and voltage hysteresis.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201404194