To fulfill our needs, we all desire a long-lasting, non-explosive and small lithium-ion battery (LIB) for our portable electronic devices and (future) electric vehicles. The use of a solid polymer as electrolyte, instead of a flammable solvent, is currently the most promising solution for thinner and safer LIBs. Poly(ethylene oxyde)-based polymers (PEO) are widely used because of their good ability to transport lithium ions at temperatures over 60 °C. Our work is focused on the structuring of classic −EO− based backbones by photo-polymerization, which is a fast, cost-effective and solvent-free technique. Solid polymer electrolytes (SPEs) based on different monomers/oligomers (methacrylic and/or −EO− based) will be presented. By incorporating high amounts of plasticizers and lithium salts, outstanding ionic conductivities are obtained (σ > 10–4 S cm–1 at 20 °C) along with a wide electrochemical stability window (>5 V vs. Li+/Li) as well as good interfacial stability. Besides, SPEs have remarkable morphological characteristics in terms of homogeneity, flexibility and robustness. All-solid lithium-based polymer cells show very good cycling behavior in terms of rate capability and stability over a wide range of operating temperatures, which make them suitable candidates for future Li-ion polymer batteries working at ambient and/or sub-ambient temperatures.

Photocured electrolytes for lithium batteries / Piana, G.; Colò, F.; Falco, M.; Meligrana, G.; Bella, F.; Gerbaldi, C.. - STAMPA. - (2017), pp. 25-25. ((Intervento presentato al convegno Merck Young Chemists Symposium – XVII Edition tenutosi a Milano Marittima (Italy) nel November 13th-15th, 2017.

Photocured electrolytes for lithium batteries

G. Piana;F. Colò;M. Falco;G. Meligrana;F. Bella;C. Gerbaldi
2017

Abstract

To fulfill our needs, we all desire a long-lasting, non-explosive and small lithium-ion battery (LIB) for our portable electronic devices and (future) electric vehicles. The use of a solid polymer as electrolyte, instead of a flammable solvent, is currently the most promising solution for thinner and safer LIBs. Poly(ethylene oxyde)-based polymers (PEO) are widely used because of their good ability to transport lithium ions at temperatures over 60 °C. Our work is focused on the structuring of classic −EO− based backbones by photo-polymerization, which is a fast, cost-effective and solvent-free technique. Solid polymer electrolytes (SPEs) based on different monomers/oligomers (methacrylic and/or −EO− based) will be presented. By incorporating high amounts of plasticizers and lithium salts, outstanding ionic conductivities are obtained (σ > 10–4 S cm–1 at 20 °C) along with a wide electrochemical stability window (>5 V vs. Li+/Li) as well as good interfacial stability. Besides, SPEs have remarkable morphological characteristics in terms of homogeneity, flexibility and robustness. All-solid lithium-based polymer cells show very good cycling behavior in terms of rate capability and stability over a wide range of operating temperatures, which make them suitable candidates for future Li-ion polymer batteries working at ambient and/or sub-ambient temperatures.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11583/2693643
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