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

Title: Probing Electrolyte Solvents at Solid/Liquid Interface Using Gap-Mode Surface-Enhanced Raman Spectroscopy

Journal Article · · Journal of the Electrochemical Society
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [2]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Florida A&M State Univ. College of Engineering, Tallahassee, FL (United States)

Understanding the aprotic solution structures at the immediate vicinity of solid/liquid interface (SLI) is critically important for next generation lithium ion battery development. Yet, it is still challenging to investigate the carbonate chemical profiles close to the diffuse layer (about 10 nm) of the electrical double layer at SLI due to the lack of a ultrahigh surface sensitive tool. In this work, we demonstrate the structures of commonly used carbonate solvents (ethylene carbonate (EC) and diethyl carbonate (DEC)) and a carbonate additive (fluoroethylene carbonate (FEC)) in a commercial Li-ion battery electrolyte can be determined at ∼17 nm above the electrode surface. This is only enabled by a nanogap surface-enhanced Raman spectroscopy (SERS) technique based on a monolayer gold nanoparticle (Au NP) ensemble. The SERS enhancement factor (EF) of those carbonates was found to depend on the molecular polarizability, with the maximum EF at ∼105 found for EC and FEC. Despite their alike chemical structures, this monolayer Au NP SERS substrate is fully capable of discrimiating the different Raman finger prints of EC and FEC. Compared to EC, several vibration modes in FEC, such as C-C skeletal deformation, ring breathing band and C=O stretching band, shift to higher frequencies because of the displacement of a hydrogen atom by a much heavier fluorine atom in a methylene bridge. This counterintuitive observation against the commonly used “ball and spring” model in vibrational spectroscopy is mostly due to the increased bond strength in the FEC ring versus that of EC. A second order empirical polynomial best describes the correlation between the SERS band integration of EC or DEC molar concentration. Furthermore, our findings open up new opportunities for in-depth understanding of the electrolyte molecular vibrational behaviors at direct solid/liquid interface and developing advanced electrolytes for next generation lithium-ion batteries.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Fluid Interface Reactions, Structures and Transport Center (FIRST); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1491062
Alternate ID(s):
OSTI ID: 1526393
Journal Information:
Journal of the Electrochemical Society, Vol. 166, Issue 2; ISSN 0013-4651
Publisher:
The Electrochemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

References (42)

cclib: A library for package-independent computational chemistry algorithms journal January 2008
Surface Enhanced Raman Spectroscopy of Individual Rhodamine 6G Molecules on Large Ag Nanocrystals journal November 1999
Combined quantum chemical/Raman spectroscopic analyses of Li+ cation solvation: Cyclic carbonate solvents—Ethylene carbonate and propylene carbonate journal December 2014
Raman Spectra and Transport Properties of Lithium Perchlorate in Ethylene Carbonate Based Binary Solvent Systems for Lithium Batteries journal June 1998
Resonant Field Enhancements from Metal Nanoparticle Arrays journal January 2004
Nanostructured Surfaces and Assemblies as SERS Media journal October 2008
General atomic and molecular electronic structure system journal November 1993
Relationship between force constants and bond lengths for CX (X = C, Si, Ge, N, P, As, O, S, Se, F, Cl and Br) single and multiple bonds: formulation of Badger’s rule for universal use journal November 2004
Evidence for short-range orientation effects in dipolar aprotic liquids from vibrational spectroscopy. Part 1.—Ethylene and propylene carbonates journal January 1973
Silicon Solid Electrolyte Interphase (SEI) of Lithium Ion Battery Characterized by Microscopy and Spectroscopy journal June 2013
Role of Mixed Solvation and Ion Pairing in the Solution Structure of Lithium Ion Battery Electrolytes journal June 2015
Electrode–Electrolyte Interface in Li-Ion Batteries: Current Understanding and New Insights journal October 2015
Gold Nanoparticle Monolayers with Tunable Optical and Electrical Properties journal April 2016
Gold Nanoparticle Monolayers from Sequential Interfacial Ligand Exchange and Migration in a Three-Phase System journal October 2016
The Role of Additives in Improving Performance in High Voltage Lithium-Ion Batteries with Potentiostatic Holds journal January 2017
What Makes Fluoroethylene Carbonate Different? journal June 2015
Solvation Structure around the Li + Ion in Mixed Cyclic/Linear Carbonate Solutions Unveiled by the Raman Noncoincidence Effect journal July 2015
Improved Parameterization of an Ethylene Carbonate Molecular Dynamics Model in Li-Air Batteries for Accurate Density and Transition Temperatures journal October 2014
A general review on the derivation of Clausius–Mossotti relation journal August 2013
Differentiating Contributions to “Ion Transfer” Barrier from Interphasial Resistance and Li + Desolvation at Electrolyte/Graphite Interface journal July 2010
Self-Assembly of Large Gold Nanoparticles for Surface-Enhanced Raman Spectroscopy journal April 2017
Electron affinities of the first‐row atoms revisited. Systematic basis sets and wave functions journal May 1992
Nonlinearity in Intensity versus Concentration Dependence for the Deep UV Resonance Raman Spectra of Toluene and Heptane journal July 2013
Fluoroethylene Carbonate as an Important Component for the Formation of an Effective Solid Electrolyte Interphase on Anodes and Cathodes for Advanced Li-Ion Batteries journal May 2017
Macmolplt: a graphical user interface for GAMESS journal June 1998
Deciphering the Ethylene Carbonate–Propylene Carbonate Mystery in Li-Ion Batteries journal January 2018
Role of Solution Structure in Solid Electrolyte Interphase Formation on Graphite with LiPF 6 in Propylene Carbonate journal November 2013
Scaling Laws for Polymer Chains Grafted onto Nanoparticles journal February 2018
Electrolytes and Interphases in Li-Ion Batteries and Beyond journal October 2014
Activated vibrational modes and Fermi resonance in tip-enhanced Raman spectroscopy journal February 2013
Self-Absorption in Resonance Raman and Rayleigh Scattering: A Numerical Solution journal November 1988
A Raman spectroscopic study of organic electrolyte solutions based on binary solvent systems of ethylene carbonate with low viscosity solvents which dissolve different lithium salts journal January 1998
Anharmonic Potential Constants and Their Dependence upon Bond Length journal August 1961
Before Li Ion Batteries journal November 2018
Li + Solvation in Pure, Binary, and Ternary Mixtures of Organic Carbonate Electrolytes journal February 2015
A Relation Between Internuclear Distances and Bond Force Constants journal March 1934
Atomistic Near-Field Nanoplasmonics: Reaching Atomic-Scale Resolution in Nanooptics journal April 2015
The Vibrational Spectra and Structure of Dimethyl Carbonate and its Conformational Behavior journal May 1975
Remarks on Refractive Index Mixture Rules journal April 1965
Improved Performance of the Silicon Anode for Li-Ion Batteries: Understanding the Surface Modification Mechanism of Fluoroethylene Carbonate as an Effective Electrolyte Additive journal March 2015
Electrolyte Solvation Structure at Solid–Liquid Interface Probed by Nanogap Surface-Enhanced Raman Spectroscopy journal September 2018
Activated Vibrational Modes and Fermi Resonance in Tip-Enhanced Raman Spectroscopy text January 2011

Figures / Tables (11)