Beyond the Polysulfide Shuttle and Lithium Dendrite Formation: Addressing the Sluggish Sulfur Redox Kinetics for Practical High-Energy Li-S Batteries
- Hong Kong Univ. of Science and Technology, Kowloon (Hong Kong); Argonne National Lab. (ANL), Lemont, IL (United States)
- Argonne National Lab. (ANL), Lemont, IL (United States)
- Hong Kong Univ. of Science and Technology, Kowloon (Hong Kong)
- Argonne National Lab. (ANL), Lemont, IL (United States); Stanford Univ., CA (United States); Imam Abdulrahman Bin Faisal Univ. (IAU), Dammam (Saudi Arabia)
Electrolyte modulation simultaneously suppresses polysulfide the shuttle effect and lithium dendrite formation of lithium-sulfur (Li-S) batteries. However, the sluggish S redox kinetics, especially under high S loading and lean electrolyte operation, has been ignored, which dramatically limits the cycle life and energy density of practical Li-S pouch cells. In this work, we demonstrate that a rational combination of selenium doping, core-shell hollow host structure, and fluorinated ether electrolytes enables ultrastable Li stripping/plating and essentially no polysulfide shuttle as well as fast redox kinetics. Thus, high areal capacity (>4 mAh cm-2) with excellent cycle stability and Coulombic efficiency were both demonstrated in Li metal anode and thick S cathode (4.5 mg cm-2) with a low electrolyte/sulfur ratio (10 mu L mg(-1)). Overall, this research further demonstrates a durable Li-Se/S pouch cell with high specific capacity, validating the potential practical applications.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- Research Grants Council (RGC) of Hong Kong; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Vehicle Technologies (VTO), Battery Materials Research (BMR) Program; USDOE
- Grant/Contract Number:
- AC02-06CH11357; T23-601/17-R; 16209218
- OSTI ID:
- 1710199
- Alternate ID(s):
- OSTI ID: 1647286
- Journal Information:
- Angewandte Chemie (International Edition), Vol. 59, Issue 40; ISSN 1433-7851
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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