Enhanced electrochemical performance of Lithium-ion batteries by conformal coating of polymer electrolyte

Nareerat Plylahan (1) , Sébastien Maria (2) , Trang N. T. Phan (2) , Manon Letiche (1) , Hervé Martinez (3) , Cecile Courreges (3) , Philippe Knauth (1) , Thierry Djenizian (4)

1 MADIREL - Matériaux divisés, interfaces, réactivité, électrochimie
2 ICR - Institut de Chimie Radicalaire
3 IPREM - Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux
4 LP3 - Laboratoire Lasers, Plasmas et Procédés photoniques

This work reports the conformal coating of poly(poly(ethylene glycol) methyl ether methacrylate) (P(MePEGMA)) polymer electrolyte on highly organized titania nanotubes (TiO(2)nts) fabricated by electrochemical anodization of Ti foil. The conformal coating was achieved by electropolymerization using cyclic voltammetry technique. The characterization of the polymer electrolyte by proton nuclear magnetic resonance (H-1 NMR) and size-exclusion chromatography (SEC) shows the formation of short polymer chains, mainly trimers. X-ray photoelectron spectroscopy (XPS) results confirm the presence of the polymer and LiTFSI salt. The galvanostatic tests at 1C show that the performance of the half cell against metallic Li foil is improved by 33% when TiO(2)nts are conformally coated with the polymer electrolyte.

Mots clés: Titania nanotubes; Polymer electrolyte; Electropolymerization; Lithium-ion batteries

Domaines: Autre; Polymères

Nareerat Plylahan, Sébastien Maria, Trang N. T. Phan, Manon Letiche, Hervé Martinez, et al.. Enhanced electrochemical performance of Lithium-ion batteries by conformal coating of polymer electrolyte. Nanoscale Research Letters, 2014, 9, pp.544. ⟨10.1186/1556-276X-9-544⟩. ⟨hal-01418553⟩