Title: Tailored crosslinking of Poly(ethylene oxide) enables mechanical robustness and improved sodium-ion conductivity

Journal Article · · Energy Storage Materials
 [1]; ORCiD logo [2];  [1];  [3]; ORCiD logo [2]; ORCiD logo [2];  [4]; ORCiD logo [1];  [3]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  4. Univ. of Tennessee, Knoxville, TN (United States)

We report that sodium-based energy storage systems are promising candidates for electric vehicles and grid-level energy storage applications. The advancement of sodium-based energy storage systems relies on the development of high performance sodium-ion conducting electrolytes and membranes that exhibit high ionic conductivity and mechanical stability. A crosslinked poly(ethylene oxide) based polymer electrolyte was developed that demonstrates high ionic conductivity, as well as excellent mechanical stability over a wide temperature range. Ionic conductivities up to 2.0 × 10-4 S/cm at 20 °C and 7.1 × 10-4 S/cm at 70 °C are achieved for the plasticized membrane, almost four orders of magnitude greater than that of the non-plasticized membrane. The membranes are mechanically robust, and the storage modulus of the membrane is maintained at ~1 MPa from -20 to 180 °C even with the addition of plasticizer. In conclusion, this study provides a synthesis approach towards the design of highly ion conducting, mechanically robust gel polymer electrolytes for Na-ion batteries, non-aqueous flow batteries, and many other applications.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC05-00OR22725; AC05-76RL01830
OSTI ID:
1558567
Report Number(s):
PNNL-SA-146061
Journal Information:
Energy Storage Materials, Journal Name: Energy Storage Materials Vol. 21; ISSN 2405-8297
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (62)

Photopolymer Electrolytes for Sustainable, Upscalable, Safe, and Ambient-Temperature Sodium-Ion Secondary Batteries journal October 2015
A Raman study of ion solvation and association in polymer electrolytes journal February 1993
Vibrational analysis of molten poly(ethylene glycol) journal October 1969
Raman spectra of poly(ethylene glycols) in solution journal October 1970
Conductivity studies on PEO:NaClO3 electrolyte system with different plasticizers journal January 2001
Effect of plasticizer on structural and electrical properties of nanocomposite solid polymer electrolytes journal December 2010
A Raman study of ion—polymer and ion—ion interactions in low molecular weight polyether—LiCF3SO3 complexes journal January 1992
A new polymer network for ionic conduction journal January 1992
Vibrational spectroscopy and structure of polymer electrolytes, poly(ethylene oxide) complexes of alkali metal salts journal January 1981
Conformation of poly(ethylene oxide) in the solid state, melt and solution measured by Raman scattering journal July 1975
Electrochemical measurement of transference numbers in polymer electrolytes journal December 1987
The structure of associated ionic species in poly(propylene oxide)-alkali metal trifluoromethanesulphonate complexes journal January 1992
Microscopic investigation of ionic conductivity in alkali metal salts-poly(ethylene oxide) adducts journal September 1983
A new Na+ ion conducting polymer electrolyte based on (PEO+NaYF4) and its use as an electrochemical cell journal December 1994
Effects of network structures and incorporated salt species on electrochemical properties of polyether-based polymer electrolytes journal July 1995
Experimental investigations on a sodium-ion-conducting polymer electrolyte based on poly(ethylene oxide) complexed with NaPF6 journal October 1995
Cation–anion and cation–polymer interactions in (PEO)nNaCF3SO3 (n=1–80) journal June 1999
Investigation on solvent-free solid polymer electrolytes for advanced lithium batteries and their performance journal February 2003
A study of cross-linked PEO gel polymer electrolytes using bisphenol A ethoxylate diacrylate: ionic conductivity and mechanical properties journal June 2003
IONIC CONDUCTIVITY AND LITHIUM TRANSFERENCE NUMBER OF POLY(ETHYLENE OXIDE):LiTFSI SYSTEM journal February 2017
Optimizing ionic conduction of poly(oxyethylene) electrolytes through controlling the cross-link density journal June 2017
Energy storage materials: A perspective journal November 2015
Recent advances of electrode materials for low-cost sodium-ion batteries towards practical application for grid energy storage journal April 2017
Polymer electrolyte for lithium batteries based on photochemically crosslinked poly(ethylene oxide) and ionic liquid journal September 2008
Solid-state dye-sensitized solar cell: Improved performance and stability using a plasticized polymer electrolyte journal July 2006
Effect of plasticizer on structure—property relationship in composite polymer electrolytes journal January 2005
UV cross-linked, lithium-conducting ternary polymer electrolytes containing ionic liquids journal September 2010
Thermal runaway caused fire and explosion of lithium ion battery journal June 2012
Composite PEOn:NaTFSI polymer electrolyte: Preparation, thermal and electrochemical characterization journal February 2014
Ionic liquids in a poly ethylene oxide cross-linked gel polymer as an electrolyte for electrical double layer capacitor journal February 2017
Light-cured polymer electrolytes for safe, low-cost and sustainable sodium-ion batteries journal October 2017
Facile and scalable fabrication of polymer-ceramic composite electrolyte with high ceramic loadings journal June 2018
Crosslinked poly(acrylonitrile–glycidyl methacrylate) as a novel gel polymer electrolyte journal January 2011
Highly-branched cross-linked poly(ethylene oxide) with enhanced ionic conductivity journal February 2017
All-solid-state lithium metal battery with solid polymer electrolytes based on polysiloxane crosslinked by modified natural gallic acid journal July 2017
Toward Safe Lithium Metal Anode in Rechargeable Batteries: A Review journal July 2017
Relationship between Conductivity, Ion Diffusion, and Transference Number in Perfluoropolyether Electrolytes journal April 2016
Effect of Plasticization on Ionic Conductivity Enhancement in Relation to Glass Transition Temperature of Crosslinked Polymer Electrolyte Membranes journal July 2016
Comparative Study of Ether-Based Electrolytes for Application in Lithium–Sulfur Battery journal June 2015
Stable Lithium Deposition Generated from Ceramic-Cross-Linked Gel Polymer Electrolytes for Lithium Anode journal June 2016
A Highly Reversible Room-Temperature Sodium Metal Anode journal November 2015
Rechargeable Sodium All-Solid-State Battery journal January 2017
Mechanically Robust, Sodium-Ion Conducting Membranes for Nonaqueous Redox Flow Batteries journal June 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
Molecular Dynamics Simulations and Vibrational Spectroscopic Studies of Local Structure in Tetraglyme:Sodium Triflate (CH 3 O(CH 2 CH 2 O) 4 CH 3 :NaCF 3 SO 3 ) Solutions journal May 2002
Crystalline Phases of Poly(Ethylene Oxide) Oligomers and Sodium Triflate:  Changes in Coordination and Conformation with Chain Length journal October 2002
13 C NMR Relaxation and 1 H Diffusion (DOSY) Studies of an Acidic Chloroaluminate Melt journal January 1996
Direct Determination of NMR Correlation Times from Spin−Lattice and Spin−Spin Relaxation Times journal May 1997
Nature and Dynamics of Lithium Ion Coordination in Oligo(ethylene glycol) Dimethacrylate-Solvent Systems:  NMR, Raman, and Quantum Mechanical Study journal September 1999
Synthesis and Characterization of Network Type Single Ion Conductors journal March 2004
A 3.8-V earth-abundant sodium battery electrode journal July 2014
Ultrastructural Characterization of the Lower Motor System in a Mouse Model of Krabbe Disease journal December 2016
A hybrid solid electrolyte for flexible solid-state sodium batteries journal January 2015
Structure–property study of cross-linked hydrocarbon/poly(ethylene oxide) electrolytes with superior conductivity and dendrite resistance journal January 2016
Electrolyte design strategies and research progress for room-temperature sodium-ion batteries journal January 2017
A new Na[(FSO 2 )(n-C 4 F 9 SO 2 )N]-based polymer electrolyte for solid-state sodium batteries journal January 2017
Na-ion batteries, recent advances and present challenges to become low cost energy storage systems journal January 2012
Normal Vibrations of the Polymer Molecules of Helical Conformation. IV. Polyethylene Oxide and Polyethylene‐ d 4 Oxide journal November 1964
Polymer Electrolytes journal July 2013
Electrochemical Behavior of Lithium Electrolytes Based on New Polyether Networks journal July 1994
Dendrite-Free Electrodeposition and Reoxidation of Lithium-Sodium Alloy for Metal-Anode Battery journal January 2011
Polymer and composite electrolytes journal October 2018