Synthesis of an Original Fluorinated triethylene glycol methacrylate Monomer and its Radical Copolymerisation with Vinylidene Fluoride. Application as Polymer Electrolyte Gel for Li-Ion Batteries

Alaaeddine, Ali;Vergnaud, Jerome;Rolland, Julien;Vlad, Alexandru;Ameduri, Bruno;et.al.
(2015) Polymer Chemistry — Vol. 6, n° 33, p. 6021-6028 (2015)

Files

No attached file found for this publication.

Details

Authors
Show more
Abstract
The synthesis and characterisation of novel poly[VDF-g-oligo(EO)] graft copolymers (where VDF and EO stand for vinylidene fluoride and ethylene oxide, respectively) are presented. First, 2-trifluoromethyl oligo(EO) acrylate, MAFTEG, was prepared by esterification of triethylene glycol monomethyl ether (TEG) with 2-trifluoromethacrylic acid (MAF) catalyzed by methanesulfonic acid, in 50% yields. Then, various radical copolymerisations of such MAFTEG with VDF from different feeds (VDF ranging from 86 to 95 mol.%) led to random poly[VDF-co-MAFTEG] copolymers that bore oligo(OE) side-chains in satisfactory yields (67%). These original graft copolymers were characterised by 1H, 19F and 13C NMR spectroscopy. Their molar masses reached 7,000 g∙mol-1 and their thermal properties were investigated while their glass transition temperatures ranged between -31 and -19 °C. Their thermogravimetric analyses under air showed decomposition temperatures from 235 to 325 °C with 10 % weight loss (Td,10%). Gel polymer electrolytes were achieved at room temperature by blending ionic liquid electrolyte (RTIL), poly[VDF-g-oligo(EO)] graft copolymers, and silica nanoparticles, the ionic liquid being made of 1-propyl-1-methyl pyrrolidinium bis(fluorosulfonyl)imide (PyrFSI) dissolving lithium bis(trifluoromethanesulfonyl)imide (LiTFSI). These novel copolymers are of potential interest as gel polymer electrolytes in lithium ion batteries, showing competitive ambient conductivities of 0.2 mS.cm-1 that increased up to 0.5 mS.cm-1 with the content of silica nanoparticles at 20 wt%. In addition, the electrolyte gel appeared to be electrochemically stable in a wide range of potentials varying from 1.5 V to 4 V vs. Li+/Li, compatible with 4 V class lithium ion batteries.
Affiliations

Citations

  • APA
  • Chicago
  • FWB

Alaaeddine, A., Vergnaud, J., Rolland, J., Vlad, A., Gohy, J.-F., & Ameduri, B. (2015). Synthesis of an Original Fluorinated triethylene glycol methacrylate Monomer and its Radical Copolymerisation with Vinylidene Fluoride. Application as Polymer Electrolyte Gel for Li-Ion Batteries. Polymer Chemistry, 6(33), 6021-6028. https://doi.org/10.1039/C5PY00732A (Original work published 2015)