High-Fluorinated Electrolytes for Li–S Batteries
Journal Article
·
· Advanced Energy Materials
- University of Maryland, College Park, MD (United States); Nanjing University of Aeronautics and Astronautics (China); University of Maryland
- Nanjing University of Aeronautics and Astronautics (China)
- University of Maryland, College Park, MD (United States)
Rechargeable Li–S batteries are regarded as one of the most promising next-generation energy-storage systems. However, the inevitable formation of Li dendrites and the shuttle effect of lithium polysulfides significantly weakens electrochemical performance, preventing its practical application. Herein, a new class of localized high-concentration electrolyte (LHCE) enabled by adding inert fluoroalkyl ether of 1H,1H,5H-octafluoropentyl-1,1,2,2-tetrafluoroethyl ether into highly-concentrated electrolytes (HCE) lithium bis(fluorosulfonyl) imide/dimethoxyether (DME) system is reported to suppress Li dendrite formation and minimize the solubility of the high-order polysulfides in electrolytes, thus reducing the amount of electrolyte in cells. Such a unique LHCE can achieve a high coulombic efficiency of Li plating/stripping up to 99.3% and completely suppressing the shuttling effect, thus maintaining a S cathode capacity of 775 mAh g-1 for 150 cycles with a lean electrolyte of 4.56 g A-1 h-1. The LHCE reduces the solubility of lithium polysulfides, allowing the Li/S cell to achieve super performance in a lean electrolyte. This conception of using inert diluents in a highly concentrated electrolyte can accelerate commercialization of Li–S battery technology.
- Research Organization:
- University of Maryland, College Park, MD (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- Grant/Contract Number:
- EE0008200; EE0008202
- OSTI ID:
- 1614093
- Alternate ID(s):
- OSTI ID: 1497239
- Journal Information:
- Advanced Energy Materials, Journal Name: Advanced Energy Materials Journal Issue: 16 Vol. 9; ISSN 1614-6832
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Optimized Electrolyte with High Electrochemical Stability and Oxygen Solubility for Lithium–Oxygen and Lithium–Air Batteries
Additives in Localized High Concentration Electrolytes for Safe Lithium-Ion Batteries
Journal Article
·
Fri Jul 10 00:00:00 EDT 2020
· ACS Energy Letters
·
OSTI ID:1646826
Additives in Localized High Concentration Electrolytes for Safe Lithium-Ion Batteries
Technical Report
·
Fri Jul 29 00:00:00 EDT 2022
·
OSTI ID:2386993