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EnglishModern life style depends on energy storage systems in which the role of Li-ion batteries (LiBs) is peerless. However, state-of-the-art LiBs are approaching the verge of possible technological imagination in energy density. Some researchers argue that next-gen secondary batteries should switch to heavier elements. Indeed, when it comes to energy storage systems for electricity grid, electric transportation or other non-portable applications, Na-ion (NiB) and Lithium Sulphur (Li-S) batteries can be an intelligent choice. These devices are still at an early stage of advancement and research must necessarily focus on the development of novel types of materials: safe polymer electrolytes, high-energy electrodes and novel production processes thereof. Here, an overview is provided on both solid/quasi-solid polymer electrolytes and nanostructured electrodes specifically conceived for NiB and Li-S secondary cells. Polymer electrolytes are based on polyethylene oxide (PEO), methacrylates and/or their mixtures; eventually, pyranose ring based natural additives and/or low volatile plasticizers are added along with supporting sodium salts to improve specifically defined characteristics. Both standard casting and smart free radical polymerization techniques are explored, thus producing multiphase electrode-electrolyte composites. In this process, an appropriate liquid reactive mixture comprising monomers, salts and eventually additives, which constitutes the polymer electrolyte precursor, is in-situ polymerised to form, in a single step, a self-standing electrode intimately connected to the ion conducting electrolyte membrane, with an efficient interpenetration of the two surfaces. Lab-scale Na-ion and Li-S polymer cells are assembled with different nanostructured electrode materials (e.g., LiFePO4, TiO2 nanotubes, sulphur–activated carbon) and tested for their long-term cycling ability and rate capability, demonstrating that safe, durable and high energy density post-lithium devices operating at ambient temperatures can be a reality in the near future.
Innovative and functional electrode/electrolyte materials for green and safe post-lithium batteries / Colò, F.; Bella, F.; Nair, J. R.; Destro, M.; Fiorilli, S.; Meligrana, G.; Gerbaldi, C.. - STAMPA. - (2017), pp. 489-489. ((Intervento presentato al convegno 21st International Conference of Solid State Ionics (SSI-21) tenutosi a Padua (Italy) nel June 18-23 2017.
| Titolo: | Innovative and functional electrode/electrolyte materials for green and safe post-lithium batteries | |
| Autori: | ||
| Data di pubblicazione: | 2017 | |
| Abstract: | Modern life style depends on energy storage systems in which the role of Li-ion batteries (LiBs) is peerless. However, state-of-the-art LiBs are approaching the verge of possible technological imagination in energy density. Some researchers argue that next-gen secondary batteries should switch to heavier elements. Indeed, when it comes to energy storage systems for electricity grid, electric transportation or other non-portable applications, Na-ion (NiB) and Lithium Sulphur (Li-S) batteries can be an intelligent choice. These devices are still at an early stage of advancement and research must necessarily focus on the development of novel types of materials: safe polymer electrolytes, high-energy electrodes and novel production processes thereof. Here, an overview is provided on both solid/quasi-solid polymer electrolytes and nanostructured electrodes specifically conceived for NiB and Li-S secondary cells. Polymer electrolytes are based on polyethylene oxide (PEO), methacrylates and/or their mixtures; eventually, pyranose ring based natural additives and/or low volatile plasticizers are added along with supporting sodium salts to improve specifically defined characteristics. Both standard casting and smart free radical polymerization techniques are explored, thus producing multiphase electrode-electrolyte composites. In this process, an appropriate liquid reactive mixture comprising monomers, salts and eventually additives, which constitutes the polymer electrolyte precursor, is in-situ polymerised to form, in a single step, a self-standing electrode intimately connected to the ion conducting electrolyte membrane, with an efficient interpenetration of the two surfaces. Lab-scale Na-ion and Li-S polymer cells are assembled with different nanostructured electrode materials (e.g., LiFePO4, TiO2 nanotubes, sulphur–activated carbon) and tested for their long-term cycling ability and rate capability, demonstrating that safe, durable and high energy density post-lithium devices operating at ambient temperatures can be a reality in the near future. | |
| Appare nelle tipologie: | 4.3 Poster |
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