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Anisotropic Lithium Ion Conductivity in Single-Ion Diblock Copolymer Electrolyte Thin Films

Abstract : Well-defined single-ion diblock copolymers consisting of a Li-ion conductive poly(styrenesulfonyllithium(trifluoromethylsulfonyl)imide) (PSLiTFSI) block associated with a glassy polystyrene (PS) block have been synthesized via reversible addition fragmentation chain transfer polymerization. Conductivity anisotropy ratio up to 1000 has been achieved from PS-b-PSLiTFSI thin films by comparing Li-ion conductivities of out-of-plane (aligned) and in-plane (antialigned) cylinder morphologies at 40 degrees C. Blending of PS-b-PSLiTFSI thin films with poly(ethylene oxide) homopolymer (hPEO) enables a substantial improvement of Li-ion transport within aligned cylindrical domains, since hPEO, preferentially located in PSLiTFSI domains, is an excellent lithium-solvating material. Results are also compared with unblended and blended PSLiTFSI homopolymer (hPSLiTFSI) homologues, which reveals that ionic conductivity is improved when thin films are nanostructured.
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https://hal.archives-ouvertes.fr/hal-01369626
Contributor : Dominique Richard <>
Submitted on : Wednesday, September 21, 2016 - 11:53:52 AM
Last modification on : Monday, November 16, 2020 - 11:56:03 AM

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Karim Aissou, Muhammad Mumtaz, Özlem Usluer, Gilles Pecastaings, Giuseppe Portale, et al.. Anisotropic Lithium Ion Conductivity in Single-Ion Diblock Copolymer Electrolyte Thin Films . Macromolecular Rapid Communications, Wiley-VCH Verlag, 2016, 37 (3), pp.221-226. ⟨10.1002/marc.201500562⟩. ⟨hal-01369626⟩

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