DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Dicarbonyl Electrolyte for High-Voltage Lithium Metal Batteries: Importance of the Entropy of Solvation in Bidentate Solvent

Journal Article · · ACS Energy Letters

An electrolyte system based on dicarbonyl solvents has been proposed and implemented in lithium metal batteries (LMBs). Among several dicarbonyl solvents explored, dimethyl dicarbonate (DMDC) emerged as the most promising electrolyte candidate. Interestingly, despite the structural similarities between DMDC and its monocarbonyl counterpart DMC, the DMDC electrolyte exhibits higher solvent coordination, even at the same lithium-to-carbonyl ratio. Further, this leads to the formation of a more robust solid-electrolyte interphase and enhances the anodic stability of the electrolyte. Notably, in various electrolyte systems, the solvation energy is typically enthalpy-driven. However, the bidentate nature of DMDC introduces a significant role for the entropy of solvation because the Li+-DMDC complexes release fewer free molecules. With the addition of non-solvating co-solvent 1,1,2,2-tetrafluoro-ethyl 2,2,3,3-tetrafluoro-propyl ether (TTE), which reduces the viscosity of the electrolyte, the DMDC-TTE system enables remarkably stable cycling of the lithium anode by manipulating the entropy of solvation. This introduces a new strategy for tailoring functional electrolyte systems.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
2481271
Journal Information:
ACS Energy Letters, Journal Name: ACS Energy Letters Journal Issue: 1 Vol. 9; ISSN 2380-8195
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

References (43)

Dendrite-Free Lithium Deposition Induced by Uniformly Distributed Lithium Ions for Efficient Lithium Metal Batteries journal February 2016
30 Years of Lithium-Ion Batteries journal June 2018
Lithium‐Metal Batteries: High‐Voltage Lithium‐Metal Batteries Enabled by Localized High‐Concentration Electrolytes (Adv. Mater. 21/2018) journal May 2018
Towards High-Safe Lithium Metal Anodes: Suppressing Lithium Dendrites via Tuning Surface Energy journal July 2016
Dendrite-Free and Performance-Enhanced Lithium Metal Batteries through Optimizing Solvent Compositions and Adding Combinational Additives journal February 2018
Countersolvent Electrolytes for Lithium‐Metal Batteries journal March 2020
A Sustainable Solid Electrolyte Interphase for High‐Energy‐Density Lithium Metal Batteries Under Practical Conditions journal February 2020
Localized High-Concentration Sulfone Electrolytes for High-Efficiency Lithium-Metal Batteries journal August 2018
Cyclic carbonate for highly stable cycling of high voltage lithium metal batteries journal February 2019
Understanding and suppression strategies toward stable Li metal anode for safe lithium batteries journal March 2020
Electric Vehicles Batteries: Requirements and Challenges journal March 2020
Li-ion battery materials: present and future journal June 2015
Superior long-term cycling of high-voltage lithium-ion batteries enabled by single-solvent electrolyte journal November 2021
Terminally fluorinated glycol ether electrolyte for lithium metal batteries journal June 2023
Toward Safe Lithium Metal Anode in Rechargeable Batteries: A Review journal July 2017
Complementary Electrolyte Design for Li Metal Batteries in Electric Vehicle Applications journal May 2021
Selecting the Optimal Fluorinated Ether Co-Solvent for Lithium Metal Batteries journal January 2023
High-Performance Cells Containing Lithium Metal Anodes, LiNi 0.6 Co 0.2 Mn 0.2 O 2 (NCM 622) Cathodes, and Fluoroethylene Carbonate-Based Electrolyte Solution with Practical Loading journal May 2018
A Localized High-Concentration Electrolyte with Optimized Solvents and Lithium Difluoro(oxalate)borate Additive for Stable Lithium Metal Batteries journal July 2018
Nonaqueous Liquid Electrolytes for Lithium-Based Rechargeable Batteries journal October 2004
Electrolytes and Interphases in Li-Ion Batteries and Beyond journal October 2014
The Li-Ion Rechargeable Battery: A Perspective journal January 2013
A New Class of Ionically Conducting Fluorinated Ether Electrolytes with High Electrochemical Stability journal April 2020
Issues and challenges facing rechargeable lithium batteries journal November 2001
Building better batteries journal February 2008
Superconcentrated electrolytes for a high-voltage lithium-ion battery journal June 2016
High rate and stable cycling of lithium metal anode journal February 2015
Electric vehicles: Driving range journal August 2016
Fire-extinguishing organic electrolytes for safe batteries journal November 2017
Performance and cost of materials for lithium-based rechargeable automotive batteries journal April 2018
Monolithic solid–electrolyte interphases formed in fluorinated orthoformate-based electrolytes minimize Li depletion and pulverization journal September 2019
Diagnosing and correcting anode-free cell failure via electrolyte and morphological analysis journal August 2020
Non-flammable electrolyte enables Li-metal batteries with aggressive cathode chemistries journal July 2018
Quantifying inactive lithium in lithium metal batteries journal August 2019
Unique behaviour of nonsolvents for polysulphides in lithium–sulphur batteries journal January 2014
Transition of lithium growth mechanisms in liquid electrolytes journal January 2016
Electrical energy storage for transportation—approaching the limits of, and going beyond, lithium-ion batteries journal January 2012
Fluorine-donating electrolytes enable highly reversible 5-V-class Li metal batteries journal January 2018
Effects of fluorinated solvents on electrolyte solvation structures and electrode/electrolyte interphases for lithium metal batteries journal February 2021
Anodic Stability of Several Anions Examined by Ab Initio Molecular Orbital and Density Functional Theories journal January 2002
Electrochemical Properties of Quaternary Ammonium Salts for Electrochemical Capacitors journal January 1997
Review—Localized High-Concentration Electrolytes for Lithium Batteries journal January 2021
Flammability of Li-Ion Battery Electrolytes: Flash Point and Self-Extinguishing Time Measurements journal January 2015