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

Insights into Spontaneous Solid Electrolyte Interphase Formation at Magnesium Metal Anode Surface from Ab Initio Molecular Dynamics Simulations

Journal Article · · ACS Applied Materials and Interfaces

Spontaneous chemical reactivity at multivalent (Mg, Ca, Zn, Al) electrode surfaces is critical to solid electrolyte interphase (SEI) formation, and hence, directly affects the longevity of batteries. Here, we report an investigation of the reactivity of 0.5 M Mg(TFSI)2 in 1,2-dimethoxyethane (DME) solvent at a Mg(0001) surface using ab initio molecular dynamics (AIMD) simulations and detailed Bader charge analysis. Based on the simulations, the initial degradation reactions of the electrolyte strongly depend on the structure of the Mg(TFSI)2 species near the anode surface. At the surface, the dissociation of Mg(TFSI)2 species occurs via cleavage of the N-S bond for the solvent separated ion pair (SSIP) and via cleavage of the C-S bond for the contact ion pair (CIP) configuration. In the case of the CIP, both TFSI anions undergo spontaneous bond dissociation reactions to form atomic O, C, S, F, and N species adsorbed on the surface of the Mg anode. These products indicate that the initial SEI layer formed on the surface of the pristine Mg anode consists of a complex mixture of multiple components such as oxides, carbides, sulfides, fluorides, and nitrides. We believe that the atomic level insights gained from these simulations will lay the groundwork for the rational design of tailored and functional interphases that are critical for the success of multivalent battery technology.

Research Organization:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1821887
Report Number(s):
PNNL-SA-164872
Journal Information:
ACS Applied Materials and Interfaces, Vol. 13, Issue 32
Country of Publication:
United States
Language:
English

References (59)

Energy storage emerging: A perspective from the Joint Center for Energy Storage Research journal June 2020
Electrical energy storage for transportation—approaching the limits of, and going beyond, lithium-ion batteries journal January 2012
Electrical Energy Storage for the Grid: A Battery of Choices journal November 2011
Promises and Challenges of Next-Generation “Beyond Li-ion” Batteries for Electric Vehicles and Grid Decarbonization journal December 2020
Magnesium batteries: Current state of the art, issues and future perspectives journal January 2014
Rechargeable magnesium battery: Current status and key challenges for the future journal October 2014
Progress in development of electrolytes for magnesium batteries journal September 2019
Computational Design of New Magnesium Electrolytes with Improved Properties journal July 2017
Electrode–electrolyte interfaces in lithium-based batteries journal January 2018
Review on modeling of the anode solid electrolyte interphase (SEI) for lithium-ion batteries journal March 2018
On the electrochemical behavior of magnesium electrodes in polar aprotic electrolyte solutions journal May 1999
Passivation Dynamics in the Anisotropic Deposition and Stripping of Bulk Magnesium Electrodes During Electrochemical Cycling journal August 2015
Mg rechargeable batteries: an on-going challenge journal January 2013
Towards a calcium-based rechargeable battery journal October 2015
Plating and stripping calcium in an organic electrolyte journal November 2017
An Efficient Halogen-Free Electrolyte for Use in Rechargeable Magnesium Batteries journal May 2015
Tuning the Reversibility of Mg Anodes via Controlled Surface Passivation by H 2 O/Cl in Organic Electrolytes journal October 2016
Improving Electrodeposition of Mg through an Open Circuit Potential Hold journal October 2015
Role of Chloride for a Simple, Non-Grignard Mg Electrolyte in Ether-Based Solvents journal June 2016
The Role of MgCl 2 as a Lewis Base in ROMgCl-MgCl 2 Electrolytes for Magnesium-Ion Batteries journal February 2016
Anion Association Strength as a Unifying Descriptor for the Reversibility of Divalent Metal Deposition in Nonaqueous Electrolytes journal July 2020
Probing Conformational Evolution and Associated Dynamics of Mg(N(SO 2 CF 3 ) 2 ) 2 ·Dimethoxyethane Adduct Using Solid-State 19 F and 1 H NMR journal February 2020
Influence of Ether Solvent and Anion Coordination on Electrochemical Behavior in Calcium Battery Electrolytes journal July 2020
LiTFSI Structure and Transport in Ethylene Carbonate from Molecular Dynamics Simulations journal March 2006
Theoretical Studies of Lithium Perchlorate in Ethylene Carbonate, Propylene Carbonate, and Their Mixtures journal January 1999
Lithium Ion Solvation and Diffusion in Bulk Organic Electrolytes from First-Principles and Classical Reactive Molecular Dynamics journal January 2015
Structure and dynamics in the lithium solvation shell of nonaqueous electrolytes journal April 2019
Molecular Structure and Electron Affinity of Metal-Solvent Complexes: Insights from Density Functional Theory Simulations journal June 2020
Ion Solvation Engineering: How to Manipulate the Multiplicity of the Coordination Environment of Multivalent Ions journal October 2020
Reactivity at the Lithium–Metal Anode Surface of Lithium–Sulfur Batteries journal November 2015
Effects of High and Low Salt Concentration in Electrolytes at Lithium–Metal Anode Surfaces journal December 2016
Elucidating electrolyte decomposition under electron-rich environments at the lithium-metal anode journal January 2017
Effects of charged interfaces on electrolyte decomposition at the lithium metal anode journal October 2020
Role of Inorganic Surface Layer on Solid Electrolyte Interphase Evolution at Li-Metal Anodes journal August 2019
Ethylene Carbonate-Based Electrolyte Decomposition and Solid–Electrolyte Interphase Formation on Ca Metal Anodes journal June 2018
Comparative Study of Ethylene Carbonate-Based Electrolyte Decomposition at Li, Ca, and Al Anode Interfaces journal February 2019
Theoretical Insights into Solid Electrolyte Interphase Formation in an Al Anode Dual-Ion Battery journal March 2020
Reaction Pathways for Solvent Decomposition on Magnesium Anodes journal April 2018
Exploration of the Detailed Conditions for Reductive Stability of Mg(TFSI) 2 in Diglyme: Implications for Multivalent Electrolytes journal February 2016
Factors Influencing Preferential Anion Interactions during Solvation of Multivalent Cations in Ethereal Solvents journal March 2021
The Coupling between Stability and Ion Pair Formation in Magnesium Electrolytes from First-Principles Quantum Mechanics and Classical Molecular Dynamics journal February 2015
Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set journal July 1996
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
Ab initiomolecular dynamics for liquid metals journal January 1993
Ab initio molecular-dynamics simulation of the liquid-metal–amorphous-semiconductor transition in germanium journal May 1994
Generalized Gradient Approximation Made Simple journal October 1996
A consistent and accurate ab initio parametrization of density functional dispersion correction (DFT-D) for the 94 elements H-Pu journal April 2010
Projector augmented-wave method journal December 1994
Inhomogeneous Electron Gas journal November 1964
From ultrasoft pseudopotentials to the projector augmented-wave method journal January 1999
PACKMOL: A package for building initial configurations for molecular dynamics simulations journal October 2009
Evaluation of (CF 3 SO 2 ) 2 N (TFSI) Based Electrolyte Solutions for Mg Batteries journal January 2015
Magnesium(II) Bis(trifluoromethane sulfonyl) Imide-Based Electrolytes with Wide Electrochemical Windows for Rechargeable Magnesium Batteries journal March 2014
Long-range corrected hybrid density functionals with damped atom–atom dispersion corrections journal January 2008
Anion-Assisted Delivery of Multivalent Cations to Inert Electrodes journal April 2021
Atoms in molecules journal January 1985
A fast and robust algorithm for Bader decomposition of charge density journal June 2006
Improved grid-based algorithm for Bader charge allocation journal January 2007
A grid-based Bader analysis algorithm without lattice bias journal January 2009