Nowadays, lithium-ion battery (LiB) and, in particular, its cheaper alternative sodium-ion battery (NiB) represent the most widely used energy storage technologies when large-scale energy storage is envisaged. Due to the versatile nature of free radical photo-polymerisation multiphase electrode-electrolyte composites are produced. In this process, an appropriate liquid reactive mixture comprising monomers, salts and eventually additives, which constitutes the polymer electrolyte precursor, is drawn into a thin film over the electrode material. Therefore, the liquid reactive mixture can penetrate into the electrode voids to achieve an intimate contact between the electrode/electrolyte surfaces, during film formation. It is then in-situ polymerised to form, in a single step, a self-standing electrode intimately connected to the Li+/Na+-ion conducting electrolyte membrane, with an efficient interpenetration of the two surfaces. By this one-pot process, we are able to optimize the interfacial properties between electrodes and polymer electrolytes obtaining high performing cells. Lab-scale Li/Na-ion polymer cells are assembled with different nanostructured electrode materials (e.g., LiFePO4, TiO2 nanotubes, Ga2O3 nanorods and graphene-wrapped mixed transition metal oxides) and tested for their long-term cycling ability and rate capability, demonstrating that safe, durable and high energy density devices conceived for green-grid storage and operating at ambient and/or sub-ambient temperatures can be a reality in the near future.

Functional Materials for Green and Safe Large-Scale Li/Na-based Energy Storage / Meligrana, G.; Colò, F.; Falco, M.; Piana, G.; Bella, F.; Gerbaldi, C.. - STAMPA. - (2018), pp. P2-46-P2-46. ((Intervento presentato al convegno 16th International Symposium on Polymer Electrolytes (ISPE-16) tenutosi a Yokohama (Japan) nel June 24-29, 2018.

Functional Materials for Green and Safe Large-Scale Li/Na-based Energy Storage

G. Meligrana;F. Colò;M. Falco;G. Piana;F. Bella;C. Gerbaldi
2018

Abstract

Nowadays, lithium-ion battery (LiB) and, in particular, its cheaper alternative sodium-ion battery (NiB) represent the most widely used energy storage technologies when large-scale energy storage is envisaged. Due to the versatile nature of free radical photo-polymerisation multiphase electrode-electrolyte composites are produced. In this process, an appropriate liquid reactive mixture comprising monomers, salts and eventually additives, which constitutes the polymer electrolyte precursor, is drawn into a thin film over the electrode material. Therefore, the liquid reactive mixture can penetrate into the electrode voids to achieve an intimate contact between the electrode/electrolyte surfaces, during film formation. It is then in-situ polymerised to form, in a single step, a self-standing electrode intimately connected to the Li+/Na+-ion conducting electrolyte membrane, with an efficient interpenetration of the two surfaces. By this one-pot process, we are able to optimize the interfacial properties between electrodes and polymer electrolytes obtaining high performing cells. Lab-scale Li/Na-ion polymer cells are assembled with different nanostructured electrode materials (e.g., LiFePO4, TiO2 nanotubes, Ga2O3 nanorods and graphene-wrapped mixed transition metal oxides) and tested for their long-term cycling ability and rate capability, demonstrating that safe, durable and high energy density devices conceived for green-grid storage and operating at ambient and/or sub-ambient temperatures can be a reality in the near future.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11583/2710878
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