skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Anomalously high elastic modulus of a poly(ethylene oxide)-based composite electrolyte

Journal Article · · Energy Storage Materials

The practical use of lithium metal anodes in solid-state batteries requires a polymer membrane with high lithium-ion conductivity, thermal/electrochemical stability, and mechanical strength. The primary challenge is to effectively decouple the ionic conductivity and mechanical strength of the polymer electrolytes. We report a remarkably facile single step synthetic strategy based on in-situ crosslinking of poly(ethylene oxide) (xPEO) in the presence of a woven glass fiber (GF). Such a simple method yields composite polymer electrolytes (CPE) of anomalously high elastic modulus up to 2.5 GPa over a broad temperature range (20 °C – 245 °C) that has never been previously documented. An unsupervised machine learning algorithm, K-mean clustering analysis, was implemented on the hyperspectral Raman mapping at the xPEO/GF interface. Using such a unique means, we show for the first time that the promoted mechanical strength originates from xPEO and GF interactions through dynamic hydrogen and ionic bonding. High ionic conductivity is achieved by the addition plasticizer (e.g. tetraglyme), where trifluoromethanesulfonate anions are tethered to the xPEO matrix and Li+ cations are favorably transported through coordination with the plasticizer. Further, stringent galvanostatic cycling tests indicates the CPE can be stably cycled for >3000 h in a Li-metal symmetric cell at a moderate temperature (nearly 1500 Coulombs/cm2 Li equivalents), outperforming most of the PEO-based electrolytes. The GF reinforced CPE reported here has multifunctional uses, such as solid electrolytes for all solid-state batteries and membranes for redox-flow batteries. Although the focus of this study is on lithium-based batteries, the results are equally promising for other alkali metal based batteries such as sodium and potassium.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1755308
Alternate ID(s):
OSTI ID: 1809845
Journal Information:
Energy Storage Materials, Vol. 35, Issue 35; ISSN 2405-8297
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (53)

Materials Science and Materials Chemistry for Large Scale Electrochemical Energy Storage: From Transportation to Electrical Grid journal June 2012
Progress and prospects of next-generation redox flow batteries journal November 2018
Recent advances of electrode materials for low-cost sodium-ion batteries towards practical application for grid energy storage journal April 2017
A silicon anode for garnet-based all-solid-state batteries: Interfaces and nanomechanics journal September 2019
Exploring Bio-inspired Quinone-Based Organic Redox Flow Batteries: A Combined Experimental and Computational Study journal November 2016
Lithium battery chemistries enabled by solid-state electrolytes journal February 2017
Origin of lithium whisker formation and growth under stress journal October 2019
Polymer Electrolytes journal July 2013
Chemically inert covalently networked triazole-based solid polymer electrolytes for stable all-solid-state lithium batteries journal January 2019
Mechanically Robust, Sodium-Ion Conducting Membranes for Nonaqueous Redox Flow Batteries journal June 2018
Facile and scalable fabrication of polymer-ceramic composite electrolyte with high ceramic loadings journal June 2018
Crystallization Kinetics of Glyme−LiX and PEO−LiX Polymer Electrolytes journal July 2007
Well-designed Crosslinked Polymer Electrolyte Enables High Ionic Conductivity and Enhanced Salt Solvation journal January 2020
Hyperbranched PEO-Based Hyperstar Solid Polymer Electrolytes with Simultaneous Improvement of Ion Transport and Mechanical Strength journal February 2019
Effect of Molecular Weight on the Mechanical and Electrical Properties of Block Copolymer Electrolytes journal June 2007
Lithium Metal Stability in Batteries with Block Copolymer Electrolytes journal January 2013
High Ionic Conductivity of Composite Solid Polymer Electrolyte via In Situ Synthesis of Monodispersed SiO 2 Nanospheres in Poly(ethylene oxide) journal December 2015
Nanocomposites of Titanium Dioxide and Polystyrene-Poly(ethylene oxide) Block Copolymer as Solid-State Electrolytes for Lithium Metal Batteries journal January 2013
Free-Standing PEO/LiTFSI/LAGP Composite Electrolyte Membranes for Applications to Flexible Solid-State Lithium-Based Batteries journal January 2019
Crosslinkable fumed silica-based nanocomposite electrolytes for rechargeable lithium batteries journal October 2006
A highly reversible room-temperature lithium metal battery based on crosslinked hairy nanoparticles journal December 2015
The Impact of Elastic Deformation on Deposition Kinetics at Lithium/Polymer Interfaces journal January 2005
Elastic Modulus of Isotopically-Concentrated Lithium journal January 1960
A novel PEO-based composite polymer electrolyte with absorptive glass mat for Li-ion batteries journal August 2007
Heat-resistant and rigid-flexible coupling glass-fiber nonwoven supported polymer electrolyte for high-performance lithium ion batteries journal March 2015
Cheap glass fiber mats as a matrix of gel polymer electrolytes for lithium ion batteries journal November 2013
Alkaline composite PEO–PVA–glass-fibre-mat polymer electrolyte for Zn–air battery journal November 2002
Polymeric gel electrolytes reinforced with glass-fibre cloth for lithium secondary batteries journal January 2001
Solvent-Free Composite PEO-Ceramic Fiber/Mat Electrolytes for Lithium Secondary Cells journal January 2005
LiFePO 4 ‐Accelerated Change in Surface and Electrochemical Properties in Aqueous Systems Induced by Mechanical Agitation journal March 2019
High-Modulus, High-Conductivity Nanostructured Polymer Electrolyte Membranes via Polymerization-Induced Phase Separation journal December 2013
Multifunctional Cross-Linked Polymeric Membranes for Safe, High-Performance Lithium Batteries journal February 2018
Suppression of Lithium Dendrite Growth Using Cross-Linked Polyethylene/Poly(ethylene oxide) Electrolytes: A New Approach for Practical Lithium-Metal Polymer Batteries journal May 2014
Hybrid Electrolytes with Controlled Network Structures for Lithium Metal Batteries journal August 2015
Polymer and composite electrolytes journal October 2018
Highly-branched cross-linked poly(ethylene oxide) with enhanced ionic conductivity journal February 2017
Optimizing ionic conduction of poly(oxyethylene) electrolytes through controlling the cross-link density journal June 2017
Structure–property study of cross-linked hydrocarbon/poly(ethylene oxide) electrolytes with superior conductivity and dendrite resistance journal January 2016
Compliant glass–polymer hybrid single ion-conducting electrolytes for lithium batteries journal December 2015
High Conductivity, High Strength Solid Electrolytes Formed by in Situ Encapsulation of Ionic Liquids in Nanofibrillar Methyl Cellulose Networks journal May 2016
Highly Conductive and Thermally Stable Ion Gels with Tunable Anisotropy and Modulus journal January 2016
Polymer electrolytes for lithium polymer batteries journal January 2016
A Close Look at the Structure of the TiO 2 -APTES Interface in Hybrid Nanomaterials and Its Degradation Pathway: An Experimental and Theoretical Study journal December 2016
Molecular structures and normal vibrations of trifluoromethane sulfonate (CF3SO3-) and its lithium ion pairs and aggregates journal January 1994
Normal Vibrations of the Polymer Molecules of Helical Conformation. IV. Polyethylene Oxide and Polyethylene‐ d 4 Oxide journal November 1964
Crystalline and Amorphous Phases in the Poly(ethylene oxide)−LiCF 3 SO 3 System journal February 1999
Vibrational spectroscopy and structure of polymer electrolytes, poly(ethylene oxide) complexes of alkali metal salts journal January 1981
Gold Nanoparticle Monolayers with Tunable Optical and Electrical Properties journal April 2016
Conformation of poly(ethylene oxide) in the solid state, melt and solution measured by Raman scattering journal July 1975
Electrolyte Solvation Structure at Solid–Liquid Interface Probed by Nanogap Surface-Enhanced Raman Spectroscopy journal September 2018
Probing Electrolyte Solvents at Solid/Liquid Interface Using Gap-Mode Surface-Enhanced Raman Spectroscopy journal January 2019
Resolution of the Modulus versus Adhesion Dilemma in Solid Polymer Electrolytes for Rechargeable Lithium Metal Batteries journal January 2012
Li 7 La 3 Zr 2 O 12 Interface Modification for Li Dendrite Prevention journal April 2016