Sodium Bis(fluorosulfonyl)imide/Poly(ethylene oxide) Polymer Electrolytes for Sodium‐Ion Batteries

Sodium-ion batteries (SIBs), a promising substitute for lithium-ion batteries (LIBs), are considered to have potential to be employed in large-scale energy storage systems with lower cost and enhanced safety as primary concerns. Solid polymer electrolyte (SPE) based SIBs will better meet these demands because of their good flame-resistance and excellent flexibility, compared with conventional organic liquid electrolyte based SIBs. Here, we describe an SPE composed of sodium bis(fluorosulfonyl)imide (NaFSI) and poly(ethylene oxide) (PEO). The NaFSI/PEO (molar ratio of EO/Na+ = 20) blended polymer electrolyte exhibits a low glass transition temperature (i.e., 37.9 oC), relatively high ionic conductivity (i.e., ~4.1 × 104 S cm1 at 80 oC), and enough electrochemical and thermal stability for application in SIBs. Most importantly, the NaFSI/PEO blended polymer electrolyte displays excellent interfacial stability with Na metal in Na/Na cells and good cycling performance in prototype cells with Na0.67Ni0.33Mn0.67O2 (NNM) as cathode material. All these properties make NaFSI based solid polymer electrolytes promising candidates for use in SIBs.

[1]  M. Armand,et al.  Behavior of polymer electrolyte batteries at 80 – 100 °C and near room temperature , 1985 .

[2]  P. Bruce,et al.  Electrochemical measurement of transference numbers in polymer electrolytes , 1987 .

[3]  T. Jacobsen,et al.  Poly(ethylene oxide)―sodium perchlorate electrolytes in solid-state sodium cells , 1988 .

[4]  Michel Armand,et al.  Large lithium polymer battery development The immobile solvent concept , 1995 .

[5]  K. Abraham,et al.  Highly Conductive PEO-like Polymer Electrolytes , 1997 .

[6]  M. Doeff,et al.  Transport property measurements of polymer electrolytes , 1998 .

[7]  Kazuhiro Ohta,et al.  Year 2000 R&D status of large-scale lithium ion secondary batteries in the national project of Japan , 2001 .

[8]  J. Kerr,et al.  Comb-shaped single ion conductors based on polyacrylate ethers and lithium alkyl sulfonate , 2005 .

[9]  Jou-Hyeon Ahn,et al.  Discharge properties of all-solid sodium–sulfur battery using poly (ethylene oxide) electrolyte , 2007 .

[10]  M. Armand,et al.  Building better batteries , 2008, Nature.

[11]  Bruno Scrosati,et al.  Polymer electrolytes: Present, past and future , 2011 .

[12]  Gerbrand Ceder,et al.  Electrode Materials for Rechargeable Sodium‐Ion Batteries: Potential Alternatives to Current Lithium‐Ion Batteries , 2012 .

[13]  Teófilo Rojo,et al.  Na-ion batteries, recent advances and present challenges to become low cost energy storage systems , 2012 .

[14]  Huilin Pan,et al.  Carbon coated Na3V2(PO4)3 as novel electrode material for sodium ion batteries , 2012 .

[15]  M. Armand,et al.  Single lithium-ion conducting polymer electrolytes based on poly[(4-styrenesulfonyl)(trifluoromethanesulfonyl)imide] anions , 2013 .

[16]  Jing Zhou,et al.  Superior Electrochemical Performance and Storage Mechanism of Na3V2(PO4)3 Cathode for Room‐Temperature Sodium‐Ion Batteries , 2013 .

[17]  M. Armand,et al.  Cation only conduction in new polymer–SiO2 nanohybrids: Na+ electrolytes , 2013 .

[18]  Liquan Chen,et al.  Room-temperature stationary sodium-ion batteries for large-scale electric energy storage , 2013 .

[19]  Synthesis and electrochemical properties of P2-Na2/3Ni1/3Mn2/3O2 , 2015, Ionics.

[20]  Shinichi Komaba,et al.  Negative electrodes for Na-ion batteries. , 2014, Physical chemistry chemical physics : PCCP.

[21]  Heng Zhang,et al.  Lithium bis(fluorosulfonyl)imide/poly(ethylene oxide) polymer electrolyte , 2014 .

[22]  M. Armand,et al.  Composite PEOn:NaTFSI polymer electrolyte: Preparation, thermal and electrochemical characterization , 2014 .

[23]  F. Bella,et al.  Photopolymer Electrolytes for Sustainable, Upscalable, Safe, and Ambient-Temperature Sodium-Ion Secondary Batteries. , 2015, ChemSusChem.

[24]  F. Bella,et al.  Cellulose-based novel hybrid polymer electrolytes for green and efficient Na-ion batteries , 2015 .

[25]  P. Johansson,et al.  Characterization of NaX (X: TFSI, FSI) – PEO based solid polymer electrolytes for sodium batteries , 2015 .

[26]  Xinhong Zhou,et al.  Safety‐Reinforced Poly(Propylene Carbonate)‐Based All‐Solid‐State Polymer Electrolyte for Ambient‐Temperature Solid Polymer Lithium Batteries , 2015 .

[27]  Yan Zhang,et al.  Self-combustion synthesis of Na3V2(PO4)3 nanoparticles coated with carbon shell as cathode materials for sodium-ion batteries , 2015 .

[28]  M. Armand,et al.  Impact of the functional group in the polyanion of single lithium-ion conducting polymer electrolytes on the stability of lithium metal electrodes , 2016 .

[29]  Shalu,et al.  Development of ionic liquid mediated novel polymer electrolyte membranes for application in Na-ion batteries , 2016 .

[30]  Heng Zhang,et al.  Single Lithium-Ion Conducting Polymer Electrolytes Based on a Super-Delocalized Polyanion. , 2016, Angewandte Chemie.

[31]  Yong-Sheng Hu,et al.  Batteries: Getting solid , 2016, Nature Energy.