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EnglishA binder-free electrode made of polycrystalline carbon-coated silicon nanoparticles encapsulated in few-layer graphene flakes is coupled with a PEO-based crosslinked bilayer polymer electrolyte (BLPE). A soft polymer electrolyte layer enriched with a pyrrolidium-based ionic liquid (Pyr14TFSI) is deposited on top of the electrode and UV cured by an in situ process to achieve optimal interfacial contact. A hard layer consisting of a crosslinked PEO-based polymer electrolyte film with a lower amount of Pyr14TFSI is integrated with the electrode/electrolyte assembly to improve the self-standing and shape-retention abilities. Proof-of-concept lab-scale Si-C||Li-metal polymer cells demonstrate a reversible specific discharge capacity up to 1044 mAh gSi–1 at 80 °C, largely outperforming the one with Pyr14TFSI/LiTFSI liquid electrolyte under the same experimental condition. Our results highlight the beneficial effect of the crosslinked PEO-based polymer matrix on the cycling performance, despite the absence of any SEI-forming agent.
A bilayer polymer electrolyte encompassing pyrrolidinium-based RTIL for binder-free silicon few-layer graphene nanocomposite anodes for Li-ion battery / Falco, M.; Palumbo, S.; Lingua, G.; Silvestri, L.; Winter, M.; Lin, R.; Pellegrini, V.; Bonaccorso, F.; Nair, J. R.; Gerbaldi, C.. - In: ELECTROCHEMISTRY COMMUNICATIONS. - ISSN 1388-2481. - STAMPA. - 118(2020), p. 106807.
| Titolo: | A bilayer polymer electrolyte encompassing pyrrolidinium-based RTIL for binder-free silicon few-layer graphene nanocomposite anodes for Li-ion battery |
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| Data di pubblicazione: | 2020 |
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| Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/j.elecom.2020.106807 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| M. Falco et al. - Electrochem. Commun. 118 (2020) 106807.pdf | Articolo principale in versione editoriale in quanto Gold Open Access | 2a Post-print versione editoriale / Version of Record |  | Visibile a tuttiVisualizza/Apri |
http://hdl.handle.net/11583/2847546
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