Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

A Dual–Phase Electrolyte for High–Energy Lithium–Sulfur Batteries

Journal Article · · Advanced Energy Materials
 [1];  [2]
  1. Univ. of Texas, Austin, TX (United States); University of Texas at Austin
  2. Univ. of Texas, Austin, TX (United States)
Dissolution of lithium polysulfides (LiPSs) is essential for fast cathode kinetics, but detrimental for anode stability, especially under lean electrolyte conditions. Here in this work, the phase separation phenomenon between solvents with different polarities (tetramethyl sulfone [TMS] and dibutyl ether [DBE]) is utilized to enable the design of a dual-phase electrolyte. High-polarity, high-density TMS–lithium bis(trifluoromethanesulfonyl)imide–ammonium trifluoroacetate as the cathode electrolyte strongly solvates LiPSs, which propel the sulfur redox reaction. Moreover, the composite of DBE and a polymeric ion conductor serves as the anode electrolyte. The addition of DBE in the anode side effectively prevents the crossover of corrosive species (LiPSs and ammonia trifluoroacetate), enabling a significant improvement in Li-metal anode stability. The electrode-specific dual-phase electrolyte design provides electrochemical performance superior to conventional electrolytes. Without additional electrode engineering, pouch cells assemble with the dual-phase electrolyte cycle under a lean electrolyte (4 µL mg–1) and low-Li-excess condition (N/P = 3) for 120 cycles.
Research Organization:
Univ. of Texas, Austin, TX (United States)
Sponsoring Organization:
USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO)
Grant/Contract Number:
EE0007762
OSTI ID:
2217442
Alternate ID(s):
OSTI ID: 1902545
Journal Information:
Advanced Energy Materials, Journal Name: Advanced Energy Materials Journal Issue: 46 Vol. 12; ISSN 1614-6832
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

References (38)

Addressing Passivation in Lithium-Sulfur Battery Under Lean Electrolyte Condition journal February 2018
Solvent-Mediated Li 2 S Electrodeposition: A Critical Manipulator in Lithium-Sulfur Batteries journal November 2018
Liquid‐Based Janus Electrolyte for Sustainable Redox Mediation in Lithium–Oxygen Batteries journal August 2021
Difluorobenzene‐Based Locally Concentrated Ionic Liquid Electrolyte Enabling Stable Cycling of Lithium Metal Batteries with Nickel‐Rich Cathode journal May 2022
Hydrophobic Organic‐Electrolyte‐Protected Zinc Anodes for Aqueous Zinc Batteries journal August 2020
The Formation/Decomposition Equilibrium of LiH and its Contribution on Anode Failure in Practical Lithium Metal Batteries journal February 2021
Anode‐Free Lithium–Sulfur Cells Enabled by Rationally Tuning Lithium Polysulfide Molecules journal July 2022
Amorphous Lithium Sulfide as Lithium‐Sulfur Battery Cathode with Low Activation Barrier journal March 2019
Enhanced Li + Transport in Ionic Liquid‐Based Electrolytes Aided by Fluorinated Ethers for Highly Efficient Lithium Metal Batteries with Improved Rate Capability journal June 2021
Localized High-Concentration Sulfone Electrolytes for High-Efficiency Lithium-Metal Batteries journal August 2018
Li2S-based anode-free full batteries with modified Cu current collector journal September 2020
Effect of organic cations in locally concentrated ionic liquid electrolytes on the electrochemical performance of lithium metal batteries journal January 2022
Lithium-Sulfur Batteries: Attaining the Critical Metrics journal February 2020
A Stirred Self-Stratified Battery for Large-Scale Energy Storage journal April 2020
A self-cleaning Li-S battery enabled by a bifunctional redox mediator journal September 2017
Novel gel polymer electrolyte for high-performance lithium–sulfur batteries journal April 2016
Tailoring Lithium Polysulfide Coordination and Clustering Behavior through Cationic Electrostatic Competition journal April 2021
Influence of Lithium Polysulfide Clustering on the Kinetics of Electrochemical Conversion in Lithium–Sulfur Batteries journal February 2020
Ammonium Additives to Dissolve Lithium Sulfide through Hydrogen Binding for High-Energy Lithium–Sulfur Batteries journal July 2016
Evoking High-Donor-Number-Assisted and Organosulfur-Mediated Conversion in Lithium–Sulfur Batteries journal December 2020
Nanotechnology for Sulfur Cathodes journal May 2021
Rechargeable Lithium–Sulfur Batteries journal July 2014
Direct observation of lithium polysulfides in lithium–sulfur batteries using operando X-ray diffraction journal May 2017
Double-slit photoelectron interference in strong-field ionization of the neon dimer journal January 2019
Achieving three-dimensional lithium sulfide growth in lithium-sulfur batteries using high-donor-number anions journal January 2019
A reflection on lithium-ion battery cathode chemistry journal March 2020
Tuning the electrolyte network structure to invoke quasi-solid state sulfur conversion and suppress lithium dendrite formation in Li–S batteries journal August 2018
Solid-state polymer electrolytes with in-built fast interfacial transport for secondary lithium batteries journal March 2019
Formulating energy density for designing practical lithium–sulfur batteries journal April 2022
Toward sustainable batteries journal December 2020
The role of polysulfide dianions and radical anions in the chemical, physical and biological sciences, including sulfur-based batteries journal January 2019
Monolithic heterojunction quasi-solid-state battery electrolytes based on thermodynamically immiscible dual phases journal January 2019
Direct tracking of the polysulfide shuttling and interfacial evolution in all-solid-state lithium–sulfur batteries: a degradation mechanism study journal January 2019
Anin situencapsulation approach for polysulfide retention in lithium–sulfur batteries journal January 2020
Implications of in situ chalcogen substitutions in polysulfides for rechargeable batteries journal January 2021
Elasticity-oriented design of solid-state batteries: challenges and perspectives journal January 2021
Unifying the clustering kinetics of lithium polysulfides with the nucleation behavior of Li 2 S in lithium–sulfur batteries journal January 2021
Upgrading traditional liquid electrolyte via in situ gelation for future lithium metal batteries journal October 2018

Similar Records

Anode-Free Lithium–Sulfur Cells Enabled by Rationally Tuning Lithium Polysulfide Molecules
Journal Article · Wed Jul 06 20:00:00 EDT 2022 · Angewandte Chemie (International Edition) · OSTI ID:1976284