High-Fluorinated Electrolytes for Li–S Batteries
Abstract
Abstract 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.
- Authors:
-
[3]
- University of Maryland, College Park, MD (United States); Nanjing University of Aeronautics and Astronautics (China)
- Nanjing University of Aeronautics and Astronautics (China)
- University of Maryland, College Park, MD (United States)
- Publication Date:
- Research Org.:
- Univ. of Maryland, College Park, MD (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- OSTI Identifier:
- 1614093
- Alternate Identifier(s):
- OSTI ID: 1497239
- Grant/Contract Number:
- EE0008200; EE0008202; DEEE0008202; DEEE0008200
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Advanced Energy Materials
- Additional Journal Information:
- Journal Volume: 9; Journal Issue: 16; Journal ID: ISSN 1614-6832
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Zheng, Jing, Ji, Guangbin, Fan, Xiulin, Chen, Ji, Li, Qin, Wang, Haiyang, Yang, Yong, DeMella, Kerry C., Raghavan, Srinivasa R., and Wang, Chunsheng. High-Fluorinated Electrolytes for Li–S Batteries. United States: N. p., 2019.
Web. doi:10.1002/aenm.201803774.
Zheng, Jing, Ji, Guangbin, Fan, Xiulin, Chen, Ji, Li, Qin, Wang, Haiyang, Yang, Yong, DeMella, Kerry C., Raghavan, Srinivasa R., & Wang, Chunsheng. High-Fluorinated Electrolytes for Li–S Batteries. United States. https://doi.org/10.1002/aenm.201803774
Zheng, Jing, Ji, Guangbin, Fan, Xiulin, Chen, Ji, Li, Qin, Wang, Haiyang, Yang, Yong, DeMella, Kerry C., Raghavan, Srinivasa R., and Wang, Chunsheng. Wed .
"High-Fluorinated Electrolytes for Li–S Batteries". United States. https://doi.org/10.1002/aenm.201803774. https://www.osti.gov/servlets/purl/1614093.
@article{osti_1614093,
title = {High-Fluorinated Electrolytes for Li–S Batteries},
author = {Zheng, Jing and Ji, Guangbin and Fan, Xiulin and Chen, Ji and Li, Qin and Wang, Haiyang and Yang, Yong and DeMella, Kerry C. and Raghavan, Srinivasa R. and Wang, Chunsheng},
abstractNote = {Abstract 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.},
doi = {10.1002/aenm.201803774},
journal = {Advanced Energy Materials},
number = 16,
volume = 9,
place = {United States},
year = {Wed Feb 27 00:00:00 EST 2019},
month = {Wed Feb 27 00:00:00 EST 2019}
}
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Figures / Tables:
Figure 1: Physicochemical parameters for various electrolytes: a) Li+ transference number and ionic conductivity; b) electrolyte viscosities as functions of shear-rate (top) and the corresponding average viscosities (bottom). c, d) Property of lithium polysulfide dissolution: c) digital photos for saturate Li2S8 in different solutions after 2 weeks standing, and d)more »
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Figures / Tables found in this record:
Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.