Designing Boron‐Based Single‐Ion Gel Polymer Electrolytes for Lithium Batteries by Photopolymerization. Issue 8 (16th March 2022)

• Record Type: Journal Article
• Authors: Alvarez‐Tirado, Marta; Guzmán‐González, Gregorio; Vauthier, Soline; Cotte, Stéphane; Guéguen, Aurélie; Castro, Laurent; Mecerreyes, David
• Other Names: Cui Guanglei guestEditor.; Tominaga Yoichi guestEditor.
• Is Part Of: Macromolecular chemistry and physics. Volume 223:Issue 8(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-03-16
• Subjects: boron methacrylic monomers -- lithium single‐ion conduction -- polymer electrolytes -- UV‐photopolymerization; Polymers -- Periodicals; Polymerization -- Periodicals; Synthetic products -- Periodicals; Macromolecules -- Periodicals; 547.7
• DOI: 10.1002/macp.202100407
• Languages: English
• ISSNs: 1022-1352

Abstract

Abstract: Single‐ion lithium conducting polymer electrolytes based on delocalized borate groups are designed and synthesized by rapid UV‐photopolymerization. For this purpose, three different functional lithium boron sp 3 anionic monomers, containing fluorinated, ethoxy, or a blend of both functionalities are synthesized. These monomers are photopolymerized in the presence of a poly(ethylene glycol) dimethacrylate crosslinker and tetraglyme as plasticizer. By this method, gel polymer electrolytes endowed with lithium single‐ion conduction are prepared (SIGPEs). The impact generated by the different functionalities of the borate groups and the addition of plasticizer on the electrochemical and ion conducting properties of the synthesized polymer electrolytes are analyzed in detail. These polymer electrolytes show high ionic conductivity (1.71 × 10 −4 S cm −1 at 25 °C) and high lithium transference number values (up to 0.85). Finally, they are investigated as solid electrolytes in lithium metal symmetrical cells showing good performance (<0.85 V at ±0.2 mA cm −2 for 175 h). Abstract : A new set of lithium single‐ion gel polymer electrolytes (SIGPEs) based on three tailored‐made lithium boron sp 3 anionic methacrylic monomers are synthesized by UV‐photopolymerization. The single‐ion monomers and SIGPEs are targeted to improve Li + disassociation and mobility within the polymer electrolyte via fluorinated, ethoxy, or a combination of both functionalities.