JOURNAL ARTICLE

Carbon Disulfide Cosolvent Electrolytes for High-Performance\nLithium Sulfur Batteries

Abstract

Development of lithium sulfur (Li–S) batteries\nwith high\nCoulombic efficiency and long cycle stability remains challenging\ndue to the dissolution and shuttle of polysulfides in electrolyte.\nHere, a novel additive, carbon disulfide (CS<sub>2</sub>), to the\norganic electrolyte is reported to improve the cycling performance\nof Li–S batteries. The cells with the CS<sub>2</sub>-additive\nelectrolyte exhibit high Coulombic efficiency and long cycle stability,\nshowing average Coulombic efficiency >99% and a capacity retention\nof 88% over the entire 300 cycles. The function of the CS<sub>2</sub> additive is 2-fold: (1) it inhibits the migration of long-chain\npolysulfides to the anode by forming complexes with polysulfides and\n(2) it passivates electrode surfaces by inducing the protective coatings\non both the anode and the cathode.

Keywords:
Faraday efficiency Electrolyte Anode Sulfur Dissolution Carbon fibers Electrode Electrochemistry

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Topics

Advanced Battery Materials and Technologies
Physical Sciences →  Engineering →  Electrical and Electronic Engineering
Thermal Expansion and Ionic Conductivity
Physical Sciences →  Materials Science →  Materials Chemistry
Advancements in Battery Materials
Physical Sciences →  Engineering →  Electrical and Electronic Engineering

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