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A Metal Organic Framework Derived Solid Electrolyte for Lithium–Sulfur Batteries

Journal Article · · Advanced Energy Materials
 [1];  [2];  [3];  [2]
  1. Univ. of Texas, Austin, TX (United States). Materials Science & Engineering Program. Texas Materials Inst.; Vidyasirimedhi Inst. of Science and Technology, Rayong (Thailand). Dept. of Chemical and Biomolecular Engineering. School of Energy Science and Engineering; OSTI
  2. Univ. of Texas, Austin, TX (United States). Materials Science & Engineering Program. Texas Materials Inst.
  3. Vidyasirimedhi Inst. of Science and Technology, Rayong (Thailand). Dept. of Chemical and Biomolecular Engineering. School of Energy Science and Engineering
+ Show Author Affiliations
Lithium–sulfur batteries (LSBs) are currently considered as promising candidates for next-generation energy storage technologies. However, their practical application is hindered by the critical issue of the polysulfide-shuttle. Herein, a metal organic framework (MOF)-derived solid electrolyte is presented to address it. The MOF solid electrolyte is developed based on a Universitetet i Oslo (UIO) structure. By grafting a lithium sulfonate (-SO3Li) group to the UIO ligand, both the ionic conductivity and the polysulfide-suppression capability of the resulting -SO3Li grafted UIO (UIOSLi) solid electrolyte are greatly improved. After integrating a Li-based ionic liquid (Li-IL), lithium bis(trifluoromethanesulfonyl)imide in 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, the resulting Li-IL/UIOSLi solid electrolyte exhibits an ionic conductivity of 3.3 × 10-4 S cm-1 at room temperature. Based on its unique structure, the Li-IL/UIOSLi solid electrolyte effectively restrains the polysulfide shuttle and suppresses lithium dendritic growth. Lithium–sulfur cells with the Li-IL/UIOSLi solid electrolyte and a Li2S6 catholyte show stable cycling performance that preserves 84% of the initial capacity after 250 cycles with a capacity-fade rate of 0.06% per cycle.
Research Organization:
Univ. of Texas, Austin, TX (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0005397
OSTI ID:
1801675
Alternate ID(s):
OSTI ID: 1632039
Journal Information:
Advanced Energy Materials, Journal Name: Advanced Energy Materials Journal Issue: 27 Vol. 10; ISSN 1614-6832
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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25 ENERGY STORAGE
ionic liquid
lithium–sulfur batteries
metal organic frameworks
polysulfide shuttle
solid electrolytes