【摘 要】
：
Lithium-sulfur(Li-S)batteries represent a“beyond Li-ion”technology with low cost and high theoretical energy density and should fulfill the ever-growing requirements of electric vehicles and stationary energy storage systems.However,the sulfur-based conve
【机 构】
：
College of Materials Science and Engineering,State Key Laboratory of Advanced Design and Manufacturi
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Lithium-sulfur(Li-S)batteries represent a“beyond Li-ion”technology with low cost and high theoretical energy density and should fulfill the ever-growing requirements of electric vehicles and stationary energy storage systems.However,the sulfur-based conversion reaction in conventional liquid electrolytes results in issues like the so-called shuttle effect of polysulfides and lithium dendrite growth,which deterio-rate the electrochemical performance and safety of Li-S batteries.Optimization of conventional organic solvents(including ether and carbonate)by fluorination to form fluorinated electrolytes is a promising strategy for the practical application of Li-S batteries.The fluorinated electrolytes,owing to the high electronegativity of fluorine,possesses attractive physicochemical properties,including low melting point,high flash point,and low solubility of lithium polysulfide,and can form a compact and stable solid elec-trolyte interphase(SEI)with the lithium metal anode.Herein,we review recent advancements in the development of fluorinated electrolytes for use in Li-S batteries.The effect of solvent molecular structure on the performance of Li-S batteries and the formation mechanism of SEI on the cathode and anode sides are analyzed and discussed in detail.The remaining challenges and future perspectives of fluori-nated electrolytes for Li-S batteries are also presented.
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