Publicação
Solid polymer electrolyte based on poly (vinylidene fluoride) with metal-organic framework and protonic ionic liquid for high-performance solid-state lithium-ion batteries at room temperature
| Resumo: | In recent decades, research into new materials for energy storage has grown exponentially. Solid-state electrolytes have been a key focus for developing safer energy storage systems, though limitations remain before practical deployment. To address this, polymeric matrices comprising poly(vinylidene fluoride) (PVDF) and UiO-66 metal organic framework (MOF) with different loadings of a protic ionic liquid (IL) incorporated in the MOF pore-space, were studied. Analyses were conducted to understand MOF/IL loading properties in the composites and their impact on battery performance. Overall, the results revealed that MOF reinforced sample structures and interacted with IL, leading to a non-linear improvement in the stability of solid polymer electrolytes during charge/discharge cycles, enhancing overall battery performance. In turn, nuclear magnetic resonance experiments allowed to conclude that only weak interactions occur between IL/MOF and IL/PVDF, since a liquid-like behaviour was detected for IL's cation, being the most dynamic element detected, on the contrary to the rest of elements that presented a rigid-like behaviour. Notably, the best battery results were achieved with a MOF/IL ratio of 20/60, exhibiting an ionic conductivity of 4.91 × 10−4 S cm−1 at room temperature, a high lithium transference number, and a stable discharge capacity after 50 cycles at C/10. These findings highlight the potential of this system for high-performance, room temperature solid polymer electrolytes. |
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| Autores principais: | Macedo, Vera |
| Outros Autores: | Gonçalves, Bruna Ferreira; Barbosa, João Carlos Pacheco; Fidalgo-Marijuan, Arkaitz; Larramendi, Idoia Ruiz De; Amo, Juan Miguel López del; Gonçalves, Renato Ferreira; Costa, Carlos Miguel Silva; Martínez-Ibáñez, María; Lanceros-Mendez, S. |
| Assunto: | Solid polymer electrolyte Poly(vinylidene fluoride) Metal-organic frameworks Protic ionic liquid Lithium-ion batteries Ciências Naturais::Ciências Químicas Ciências Naturais::Ciências Físicas Energias renováveis e acessíveis |
| Ano: | 2025 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso restrito |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| Resumo: | In recent decades, research into new materials for energy storage has grown exponentially. Solid-state electrolytes have been a key focus for developing safer energy storage systems, though limitations remain before practical deployment. To address this, polymeric matrices comprising poly(vinylidene fluoride) (PVDF) and UiO-66 metal organic framework (MOF) with different loadings of a protic ionic liquid (IL) incorporated in the MOF pore-space, were studied. Analyses were conducted to understand MOF/IL loading properties in the composites and their impact on battery performance. Overall, the results revealed that MOF reinforced sample structures and interacted with IL, leading to a non-linear improvement in the stability of solid polymer electrolytes during charge/discharge cycles, enhancing overall battery performance. In turn, nuclear magnetic resonance experiments allowed to conclude that only weak interactions occur between IL/MOF and IL/PVDF, since a liquid-like behaviour was detected for IL's cation, being the most dynamic element detected, on the contrary to the rest of elements that presented a rigid-like behaviour. Notably, the best battery results were achieved with a MOF/IL ratio of 20/60, exhibiting an ionic conductivity of 4.91 × 10−4 S cm−1 at room temperature, a high lithium transference number, and a stable discharge capacity after 50 cycles at C/10. These findings highlight the potential of this system for high-performance, room temperature solid polymer electrolytes. |
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