title: Greatly Suppressed Shuttle Effect for Improved Lithium Sulfur Battery Performance through Short Chain Intermediates.
abstract: The high solubility of long-chain lithium polysulfides and their infamous shuttle effect in lithium sulfur battery lead to rapid capacity fading along with low Coulombic efficiency. To address above issues, we propose a new strategy to suppress the shuttle effect for greatly enhanced lithium sulfur battery performance mainly through the formation of short-chain intermediates during discharging, which allows significant improvements including high capacity retention of 1022 mAh/g with 87% retention for 450 cycles. Without LiNO3-containing electrolytes, the excellent Coulombic efficiency of ∼99.5% for more than 500 cycles is obtained, suggesting the greatly suppressed shuttle effect. In situ UV/vis analysis of electrolyte during cycling reveals that the short-chain Li2S2and Li2S3polysulfides are detected as main intermediates, which are theoretically verified by density functional theory (DFT) calculations. Our strategy may open up a new avenue for practical application of lithium sulfur battery.
authors.affiliation: College of Physics, Optoelectronics and Energy, Suzhou Key Laboratory of Advanced Carbon Materials and Wearable Energy Technology & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University , Suzhou 215006, China.
authors.forename: Na
authors.initials: N
authors.lastname: Xu
authors.affiliation: College of Physics, Optoelectronics and Energy, Suzhou Key Laboratory of Advanced Carbon Materials and Wearable Energy Technology & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University , Suzhou 215006, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Qian
authors.affiliation: College of Physics, Optoelectronics and Energy, Suzhou Key Laboratory of Advanced Carbon Materials and Wearable Energy Technology & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University , Suzhou 215006, China.
authors.forename: Xuejun
authors.initials: X
authors.lastname: Liu
authors.affiliation: College of Physics, Optoelectronics and Energy, Suzhou Key Laboratory of Advanced Carbon Materials and Wearable Energy Technology & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University , Suzhou 215006, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Liu
authors.affiliation: College of Physics, Optoelectronics and Energy, Suzhou Key Laboratory of Advanced Carbon Materials and Wearable Energy Technology & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University , Suzhou 215006, China.
authors.forename: Yu
authors.identifier: 0000-0001-9669-2475
authors.initials: Y
authors.lastname: Chen
authors.affiliation: College of Physics, Optoelectronics and Energy, Suzhou Key Laboratory of Advanced Carbon Materials and Wearable Energy Technology & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University , Suzhou 215006, China.
authors.forename: Chenglin
authors.identifier: 0000-0003-4467-9441
authors.initials: C
authors.lastname: Yan
keywords: Lithium sulfur battery; in situ UV/vis analysis; short chain intermediates; shuttle effect