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

High-entropy electrolytes for practical lithium metal batteries

Journal Article · · Nature Energy
 [1];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [3]
  1. Stanford Univ., CA (United States); SLAC
  2. Stanford Univ., CA (United States)
  3. Stanford Univ., CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES)
Electrolyte engineering is crucial for improving battery performance, particularly for lithium metal batteries. Recent advances in electrolytes have greatly improved cyclability by enhancing electrochemical stability at the electrode interfaces, but concurrently achieving high ionic conductivity has remained challenging. Here we report an electrolyte design strategy for enhanced lithium metal batteries by increasing the molecular diversity in electrolytes, which essentially leads to high entropy electrolytes (HEEs). We find that in weakly solvating electrolytes, the entropy effect reduces ion clustering while preserving the characteristic anion-rich solvation structures, which is characterized by synchrotron-based X-ray scattering and molecular dynamics simulations. Electrolytes with smaller- sized clusters exhibit a 2-fold improvement in ionic conductivity compared to conventional weakly- solvating electrolytes, enabling stable cycling at high current densities up to 2C (6.2 mA cm-2) in anode- free LiNi0.6Mn0.2Co0.2 (NMC622)||Cu pouch cells. In conclusion, the efficacy of the design strategy is verified by performance improvements in three disparate weakly solvating electrolyte systems.
Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO); USDOE Office of Science (SC)
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
2000066
Journal Information:
Nature Energy, Journal Name: Nature Energy Journal Issue: 8 Vol. 8; ISSN 2058-7546
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

References (62)

High-Voltage Lithium-Metal Batteries Enabled by Localized High-Concentration Electrolytes journal March 2018
Dual‐Solvent Li‐Ion Solvation Enables High‐Performance Li‐Metal Batteries journal May 2021
High‐Fluorinated Electrolytes for Li–S Batteries journal February 2019
Insights into the Nanostructure, Solvation, and Dynamics of Liquid Electrolytes through Small‐Angle X‐Ray Scattering journal December 2020
Regulating Interfacial Chemistry in Lithium‐Ion Batteries by a Weakly Solvating Electrolyte** journal November 2020
MDAnalysis: A toolkit for the analysis of molecular dynamics simulations journal April 2011
Multiwfn: A multifunctional wavefunction analyzer journal December 2011
Highly Fluorinated Interphases Enable High-Voltage Li-Metal Batteries journal January 2018
Localized High-Concentration Sulfone Electrolytes for High-Efficiency Lithium-Metal Batteries journal August 2018
Understanding Thermodynamic and Kinetic Contributions in Expanding the Stability Window of Aqueous Electrolytes journal December 2018
Solubilities of six lithium salts in five non-aqueous solvents and in a few of their binary mixtures journal April 2018
High-Efficiency Lithium Metal Batteries with Fire-Retardant Electrolytes journal August 2018
Enabling High-Voltage Lithium-Metal Batteries under Practical Conditions journal July 2019
Liquid electrolyte: The nexus of practical lithium metal batteries journal March 2022
High-entropy alloy: challenges and prospects journal July 2016
Ultrahigh coulombic efficiency electrolyte enables Li||SPAN batteries with superior cycling performance journal January 2021
Localized High Concentration Electrolytes for High Voltage Lithium–Metal Batteries: Correlation between the Electrolyte Composition and Its Reductive/Oxidative Stability journal July 2020
Lithium Metal Anodes with Nonaqueous Electrolytes journal November 2020
Before Li Ion Batteries journal November 2018
Correlated Ion Transport and the Gel Phase in Room Temperature Ionic Liquids journal March 2021
Li + Local Structure in Hydrofluoroether Diluted Li-Glyme Solvate Ionic Liquid journal March 2016
Solid-Like Nano-Anion Cluster Constructs a Free Lithium-Ion-Conducting Superfluid Framework in a Water-in-Salt Electrolyte journal June 2021
An X-ray Photoelectron Spectroscopy Primer for Solid Electrolyte Interphase Characterization in Lithium Metal Anodes journal July 2022
Nonaqueous Liquid Electrolytes for Lithium-Based Rechargeable Batteries journal October 2004
Unusual Stability of Acetonitrile-Based Superconcentrated Electrolytes for Fast-Charging Lithium-Ion Batteries journal March 2014
Correlating Li-Ion Solvation Structures and Electrode Potential Temperature Coefficients journal January 2021
Potentiometric Measurement to Probe Solvation Energy and Its Correlation to Lithium Battery Cyclability journal June 2021
Steric Effect Tuned Ion Solvation Enabling Stable Cycling of High-Voltage Lithium Metal Battery journal October 2021
Evaluation and Reparametrization of the OPLS-AA Force Field for Proteins via Comparison with Accurate Quantum Chemical Calculations on Peptides journal July 2001
Potential Energy Landscape of Bis(fluorosulfonyl)amide journal August 2008
Layered reduced graphene oxide with nanoscale interlayer gaps as a stable host for lithium metal anodes journal March 2016
Reviving the lithium metal anode for high-energy batteries journal March 2017
Long cycle life and dendrite-free lithium morphology in anode-free lithium pouch cells enabled by a dual-salt liquid electrolyte journal July 2019
Monolithic solid–electrolyte interphases formed in fluorinated orthoformate-based electrolytes minimize Li depletion and pulverization journal September 2019
All-temperature batteries enabled by fluorinated electrolytes with non-polar solvents journal October 2019
Molecular design for electrolyte solvents enabling energy-dense and long-cycling lithium metal batteries journal June 2020
Diagnosing and correcting anode-free cell failure via electrolyte and morphological analysis journal August 2020
Ultra-high-voltage Ni-rich layered cathodes in practical Li metal batteries enabled by a sulfonamide-based electrolyte journal March 2021
Balancing interfacial reactions to achieve long cycle life in high-energy lithium metal batteries journal June 2021
Pressure-tailored lithium deposition and dissolution in lithium metal batteries journal October 2021
High areal capacity, long cycle life 4 V ceramic all-solid-state Li-ion batteries enabled by chloride solid electrolytes journal January 2022
Rational solvent molecule tuning for high-performance lithium metal battery electrolytes journal January 2022
Cation-disordered rocksalt-type high-entropy cathodes for Li-ion batteries journal October 2020
Universal chemomechanical design rules for solid-ion conductors to prevent dendrite formation in lithium metal batteries journal April 2020
Suspension electrolyte with modified Li+ solvation environment for lithium metal batteries journal January 2022
High-entropy ceramics journal February 2020
Transition of lithium growth mechanisms in liquid electrolytes journal January 2016
Ionic association analysis of LiTDI, LiFSI and LiPF 6 in EC/DMC for better Li-ion battery performances journal January 2019
Multi-anionic and -cationic compounds: new high entropy materials for advanced Li-ion batteries journal January 2019
Electrolyte design implications of ion-pairing in low-temperature Li metal batteries journal January 2022
Unifying the clustering kinetics of lithium polysulfides with the nucleation behavior of Li 2 S in lithium–sulfur batteries journal January 2021
The ORCA quantum chemistry program package journal June 2020
Theory of ion aggregation and gelation in super-concentrated electrolytes journal June 2020
Role of inner solvation sheath within salt–solvent complexes in tailoring electrode/electrolyte interphases for lithium metal batteries journal November 2020
Effects of fluorinated solvents on electrolyte solvation structures and electrode/electrolyte interphases for lithium metal batteries journal February 2021
Morphology of ion clusters in aqueous electrolytes journal March 2008
Electrical Energy Storage and Intercalation Chemistry journal June 1976
How lithium dendrites form in liquid batteries journal October 2019
High-entropy mechanism to boost ionic conductivity journal December 2022
Exploring the Impact of Mechanical Pressure on the Performance of Anode-Free Lithium Metal Cells journal January 2019
Electrochemical Characterization and Temperature Dependency of Mass-Transport Properties of LiPF 6 in EC:DEC journal December 2014
Hot Formation for Improved Low Temperature Cycling of Anode-Free Lithium Metal Batteries journal January 2019

Figures / Tables (5)


Similar Records

Dual-Solvent Li-Ion Solvation Enables High-Performance Li-Metal Batteries
Journal Article · Sat May 08 20:00:00 EDT 2021 · Advanced Materials · OSTI ID:1787601

Related Subjects