Shielding Polysulfide Intermediates by an Organosulfur‐Containing Solid Electrolyte Interphase on the Lithium Anode in Lithium–Sulfur Batteries

The lithium–sulfur (Li–S) battery is regarded as a promising high‐energy‐density battery system, in which the dissolution–precipitation redox reactions of the S cathode are critical. However, soluble Li polysulfides (LiPSs), as the indispensable intermediates, easily diffuse to the Li anode and reac...

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Vydané v:Advanced materials (Weinheim) Ročník 32; číslo 37; s. e2003012 - n/a
Hlavní autori: Wei, Jun‐Yu, Zhang, Xue‐Qiang, Hou, Li‐Peng, Shi, Peng, Li, Bo‐Quan, Xiao, Ye, Yan, Chong, Yuan, Hong, Huang, Jia‐Qi
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Weinheim Wiley Subscription Services, Inc 01.09.2020
Predmet:
additives
Anodes
Anodic protection
Battery cycles
Cathodes
Cathodic dissolution
Chemical precipitation
Corrosion prevention
Dissolution
Electrolytes
Lithium
lithium metal anodes
Lithium sulfur batteries
Materials science
Polysulfides
Redox reactions
Shielding
solid electrolyte interphase
Solid electrolytes
Sulfur
Thiophenol
ISSN:0935-9648, 1521-4095, 1521-4095
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Shrnutí:The lithium–sulfur (Li–S) battery is regarded as a promising high‐energy‐density battery system, in which the dissolution–precipitation redox reactions of the S cathode are critical. However, soluble Li polysulfides (LiPSs), as the indispensable intermediates, easily diffuse to the Li anode and react with the Li metal severely, thus depleting the active materials and inducing the rapid failure of the battery, especially under practical conditions. Herein, an organosulfur‐containing solid electrolyte interphase (SEI) is tailored for the stabilizaiton of the Li anode in Li–S batteries by employing 3,5‐bis(trifluoromethyl)thiophenol as an electrolyte additive. The organosulfur‐containing SEI protects the Li anode from the detrimental reactions with LiPSs and decreases its corrosion. Under practical conditions with a high‐loading S cathode (4.5 mgS cm−2), a low electrolyte/S ratio (5.0 µL mgS−1), and an ultrathin Li anode (50 µm), a Li–S battery delivers 82 cycles with an organosulfur‐containing SEI in comparison to 42 cycles with a routine SEI. This work provokes the vital insights into the role of the organic components of SEI in the protection of the Li anode in practical Li–S batteries. An organosulfur‐containing solid electrolyte interphase (SEI) is tailored for the stabilization of the Li anode in Li–S batteries by employing 3,5‐bis(trifluoromethyl)thiophenol as an electrolyte additive. The organosulfur‐containing SEI protects the Li anode from the detrimental reactions with Li polysulfides (LiPSs). A Li–S battery delivers 82 cycles with an organosulfur‐containing SEI in comparison to 42 cycles with a routine SEI under practical conditions.
Bibliografia:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:0935-9648
1521-4095
1521-4095
DOI:10.1002/adma.202003012