Effect of the anionic composition of sulfolane based electrolytes on the performances of lithium-sulfur batteries  

作　　者：Elena V.Karaseva Elena V.Kuzmina Bo-Quan Li Qiang Zhang Vladimir S.Kolosnitsyn 

机构地区：[1]Ufa Institute of Chemistry of the Ufa Federal Research Centre of the Russian Academy of Science,71,Prospect Oktyabrya,Ufa 450054,Bashkortostan,Russia [2]Advanced Research Institute of Multidisciplinary Science,Beijing Institute of Technology,Beijing 100081,China [3]Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology,Department of Chemical Engineering,Tsinghua University,Beijing 100084,China

出　　处：《Journal of Energy Chemistry》2024年第8期231-240,I0005,共11页能源化学（英文版）

基　　金：supported by the Russian Science Foundation as part of joint project of RSF-NSFC no.21-43-00006“Polysulfide IonSolvent Complexes and Their Electrochemical Behavior in Lithium-Sulfur Batteries”with the National Natural Science Foundation of China(22061132002)。

摘　　要：In lithium-sulfur batteries,cell design,specifically electrolyte design,has a key impact on the battery performance.The effect of lithium salt anion donor number(DN)(DN[PF_(6)]^(-)=2.5,DN[N(SO_(2)CF_(3))_(2)]^(-)=5.4,DN[ClO_(4)]^(-)=8.4,DN[SO_(3)CF_(3)]^(-)=16.9,and DN[NO_(3)]^(-)=21.1)on the patterns of lithium-sulfur batteries and lithium metal electrode performances with sulfola ne-based electrolytes is investigated.An increase in DN of lithium salt anions leads to an increase in the depth and rate of electrochemical reduction of sulfur and long-chain lithium polysulfides and to a decrease in those for medium-and short-chain lithium polysulfides.DN of lithium salt anions has weak effect on the discharge capacity of lithium-sulfur batteries and the Coulomb efficiency during cycling,with the exception of LiSO_(3)CF_(3)and LiNO_(3).An increase in DN of lithium salt anions leads to an increase in the cycling duration of lithium metal anodes and to a decrease in the presence of lithium polysulfides.In sulfolane solutions of LiNO_(3)and LiSO_(3)CF_(3),lithium polysulfides do not affect the cycling duration of lithium metal anodes.

关 键 词：Donor number Lithium salt SULFOLANE Lithium polysulfide ELECTROLYTE Lithium-sulfur battery Lithium metal electrode 

分 类 号：TM912[电气工程—电力电子与电力传动]